Model Engine Maker

Engines => From Plans => Topic started by: fumopuc on August 31, 2014, 03:19:45 PM

Title: another Snow engine
Post by: fumopuc on August 31, 2014, 03:19:45 PM
Hello everybody, as already mentioned in an other thread, I have started to build the Snow engine. Due to the availability of stock material in Germany, I have converted some dimensions in metric sizes. In example the piston rod, the crank shaft, the camshaft, all nuts, studs and bolts......
For this it was necessary to do all the drawings new in CAD and to check the fitting with each other part. Specially the situation with metric bolts has to be checked carefully, because at some places is not so much material for dimension changes. The main bore is also slightly modified to 27 mm, because I could get some 27x1,5mm piston rings of the shelve. Due to the piston rod dimension change, it was also necessary to find the right lip seal from FKM (FPM, Viton) for this application, but I have been successful in the Volkswagen, Seat spare part catalog.
It is also my goal, to give this engine a bit more the look from 1900, that will be difficult but lets try.
The first real part I have started with, was the flywheel. I have bought a cheap low quality casting with 240 mm diameter and started my modifications. The result is shown in the following pictures. I will ad the story, how to get there, later.
 



Title: Re: another Snow engine
Post by: tvoght on August 31, 2014, 03:38:21 PM
I will be watching Achim. It will be interesting to see how you got those square pockets in the rim of the flywheel!

--Tim
Title: Re: another Snow engine
Post by: fumopuc on August 31, 2014, 03:39:21 PM
....and now the making of this flywheel. The fixation to the crankshaft is the same as shown in the original drawings, a cone will clamp the wheel and shaft together. After seeing all the pictures of the big Snow engines in the American Museum, I have done the decision, that mainly black for the engine parts and red for the flywheel should be the colors. I have tried to fake the hub a bit, with medium success. The solution with the illusion of the shrink anchors seem to be a bit more successful. And also the 90 rectangle wholes around the rim are O.K. now.
Title: Re: another Snow engine
Post by: Dave Otto on August 31, 2014, 04:51:55 PM
Beautiful work the the flywheel Achim.

I will be following along with your build of this interesting engine. I like the fact that you are going to make it look more like the original engine.

Your work is wonderful, and thanks for taking the time to post your progress.

Dave
Title: Re: another Snow engine
Post by: Kim on August 31, 2014, 04:54:36 PM
That's pretty neat Achim!  Like Tim, I was wondering how you made all those square holes in the rim of the flywheel.  Now I see...

So my next question is, how'd you make the big rim rings to go on either side of the square holes?  I'd love to see a picture or two of how you mounted those while you were turning them.

Thanks for sharing your work Achim!  Your flywheel looks beautiful!
Kim
Title: Re: another Snow engine
Post by: fumopuc on August 31, 2014, 05:08:28 PM
Hi Kim, the rings have been to big for my lathe at home. I am able to machine the flywheel and also the rings but there is no chance  to cut them off. So I have "organized" this job at work and sorry there are no pictures available. The final turning operation, with the glued on rings are made than again on my lathe. 
Title: Re: another Snow engine
Post by: Roger B on August 31, 2014, 05:13:25 PM
Looks good, I will be following along  :popcorn:  :DrinkPint:  I see you like stretching your tools to the limit as much as I do  ;)
Title: Re: another Snow engine
Post by: Kim on August 31, 2014, 05:23:30 PM
Hi Kim, the rings have been to big for my lathe at home. I am able to machine the flywheel and also the rings but there is no chance  to cut them off. So I have "organized" this job at work and sorry there are no pictures available. The final turning operation, with the glued on rings are made than again on my lathe.

Makes sense Achim.  Thanks for sharing.  It looks great even if I don't get to see the pictures of them being made! :)
Kim
Title: Re: another Snow engine
Post by: b.lindsey on August 31, 2014, 05:51:43 PM
Beautiful work Achim...I'm looking forward to more as well.

Bill
Title: Re: another Snow engine
Post by: smfr on August 31, 2014, 06:00:08 PM
Very cool! There isn't much left of the original hub of that flywheel! Out of interest, where did you get the flywheel casting?

Simon
Title: Re: another Snow engine
Post by: fumopuc on August 31, 2014, 06:04:55 PM
Very cool! There isn't much left of the original hub of that flywheel! Out of interest, where did you get the flywheel casting?

Simon

Hi Simon, it is from Luxembourg.
 http://www.rc-machines.com/en/model-engineering/set-of-casting/flying-wheel-cast-iron-o-235-mm  (http://www.rc-machines.com/en/model-engineering/set-of-casting/flying-wheel-cast-iron-o-235-mm)
Title: Re: another Snow engine
Post by: vcutajar on August 31, 2014, 06:23:29 PM
Nice start with the flywheel.  Will be following along.

Vince
Title: Re: another Snow engine
Post by: Coopertje on August 31, 2014, 09:18:55 PM
Very nice work Achim, never tought of making the square holes like that! Like the looks and your creativity, looking forward to the next update.

Jeroen
Title: Re: another Snow engine
Post by: fumopuc on September 01, 2014, 05:31:56 AM
Hi Tim, Dave, Kim, Roger, Bill, Simon, Vince  and Jeroen thanks for looking and all the friendly comments.
Title: Re: another Snow engine
Post by: fumopuc on September 06, 2014, 04:23:47 PM
Hi Everybody, I am just planing the size of the bed plate of my Snow engine. Plan is to glue some tiles on the bed plate to get a nice floor. This time I will use 10x10 mm glass tiles in black and white. My experience from an earlier project is, that is difficult to cut them. So I have  made a draft in CAD about the possible grid and will try to adapt all engine foundations to this grid, that no major tile cutting will be necessary. The next task will be to glue the tiles also in accordance to this grid. I (my CNC) have made a jig to get bigger pieces of this small tiles in one pieces. If at the end everything will match together will be the final question, which will be answered in one or more year if I can start the final tiling. But now I know how to get the dimensions for the aluminum plates, which will be the foundation of the engine..

Title: Re: another Snow engine
Post by: Don1966 on September 06, 2014, 05:08:43 PM
Hi Achim, just catching up on your built because some how I missed it. I just love the work you did on the flywheel a very nice bit of engineering and that came out great from what I see. I will be following you as you progress.  :ThumbsUp:

 :popcorn:

Don
Title: Re: another Snow engine
Post by: vcutajar on September 06, 2014, 05:41:28 PM
Love chequered tiles.  I was thinking of the same pattern of my Corliss.  Most probably I will try a different method.  I will either make a commercial sticker with the pattern or they told me that they can even print direct onto the aluminum base.

Vince
Title: Re: another Snow engine
Post by: b.lindsey on September 06, 2014, 07:45:12 PM
I like it Achim...will make a fine looking base for the Snow.

Bill
Title: Re: another Snow engine
Post by: Dave Otto on September 07, 2014, 01:26:02 AM
I too love the look of the checkered tile floor. Some day I hope to build an engine worthy of this treatment.
I'm curious to watch how this progresses.

Dave
Title: Re: another Snow engine
Post by: fumopuc on September 07, 2014, 07:49:29 AM
Don, Vince, Bill and Dave, thanks for encourage me and the friendly words. The progress will need some time, because shop time is rare at the moment.
Title: Re: another Snow engine
Post by: fumopuc on September 14, 2014, 06:29:43 PM
Hi Everybody, nothing special today, only some small progress with the base for the crankshaft / flywheel bearings.
Starting by a lump of aluminum, oops a broken drill, no real problem was easy possible to drill a hole from the other side and knock him out, some swarf and some more swarf.
Title: Re: another Snow engine
Post by: vcutajar on September 14, 2014, 07:43:45 PM
Lots of swarf.  Could hardly see the rotary table in one of the photos.

Vince
Title: Re: another Snow engine
Post by: ths on September 15, 2014, 03:17:15 AM
Yes, lots of swarf. I just bought a small hand held rechargeable vacuum for dealing with that, it works. Hugh.
Title: Re: another Snow engine
Post by: Roger B on September 15, 2014, 07:25:38 AM
Glad to see you got back in the workshop  :) .
Title: Re: another Snow engine
Post by: fumopuc on October 11, 2014, 06:33:13 AM
Hi everybody, some more little progress with this project. After seeing some pictures and videos of this engine in the net, I have made the decision to make there an additional bearing for the crankshaft. Next step was to make the the big plate where the main components of these engine are assembled. My mill has already 480 mm travelling in x direction, but for this plate not enough. So I had to change my set up several times. If have modified the original design a bit, I will explain the reason later. Now I have been first time in the position to bolt two parts together. Next step will be to finalize the extra bearing support and than I will start with the wooden main plate. Target is, to get everything already in the right position in accordance to my tiling grid.
Title: Re: another Snow engine
Post by: ReFlad on October 12, 2014, 08:26:09 PM
Nice work.  Looking forward to the rest!
Title: Re: another Snow engine
Post by: Don1966 on October 12, 2014, 08:30:49 PM
Achim glad to see you back to making progress. The snow is on my list of engines to build. So I will be taking notes my friend.

 8)
Don
Title: Re: another Snow engine
Post by: b.lindsey on October 13, 2014, 12:29:14 AM
I saw Doug Kelley at our show this weekend. He now has his roughly 60% version of his original Snow running, but unfortunately it wasn't one of the models her brought this year. These are mesmerizing engines to see running. Nice to see your progress Achim!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on October 14, 2014, 04:03:52 PM
Nice work.  Looking forward to the rest!
Hi ReFlad, thanks for commenting. The "rest" will take some time.
 
Achim glad to see you back to making progress. The snow is on my list of engines to build. So I will be taking notes my friend.

 8)
Don

Hi Don, o.k. take some notes but be aware of my failures. I have get my wooden base last weekend, may be I will have some time to prepare it tomorrow. I am also just preparing my first home made sandblasting box.


 
I saw Doug Kelley at our show this weekend. He now has his roughly 60% version of his original Snow running, but unfortunately it wasn't one of the models her brought this year. These are mesmerizing engines to see running. Nice to see your progress Achim!!

Bill

 Hi Bill, thanks for commenting. I have started also some efforts to copy this mesmerizing effect. Basic is sure the possibility to get it run in low revs. One thing I have already done, was to increase the diameter of the flywheel. My one is 240 mm, so I hope to store some more energy in the bigger mass. Of course the mixture control will be the main thing to get it run slowly. 


Title: Re: another Snow engine
Post by: Roger B on October 14, 2014, 06:40:49 PM
Still following along and enjoying  :ThumbsUp:  :ThumbsUp: Maybe one day I'll get to München and see it working  :)
Title: Re: another Snow engine
Post by: fumopuc on October 14, 2014, 06:46:01 PM
Still following along and enjoying  :ThumbsUp:  :ThumbsUp: Maybe one day I'll get to München and see it working  :)
Hi Roger, let me know when, you are welcome.
Title: Re: another Snow engine
Post by: Roger B on October 14, 2014, 06:56:29 PM
I was planning to come this summer to meet an old colleague and visit the Deutsches Museum  but work (in China) and the weather got in the way. Hopefully next year  :)
Title: Re: another Snow engine
Post by: fumopuc on October 15, 2014, 05:49:18 PM
Hi everybody, we have a wooden base plate. After checking with some sample tiling, it seems that my aluminum sub base plates are in the grid of the tiles.

Title: Re: another Snow engine
Post by: Don1966 on October 16, 2014, 12:08:27 AM
Achim I love your tile work, simply stunning.

Don
Title: Re: another Snow engine
Post by: b.lindsey on October 16, 2014, 01:00:47 AM
Very nice looking base Achim!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on October 17, 2014, 07:21:27 PM
Hi Don,
Hi Bill,
thanks for following along.
Some extra shop time and some progress. I have made this tiny bushes for the later fixation of the crank shaft bearing blocks.
To train my skills, I have also made some plates/dummy bearing blocks for each sub base. I have one more than the original drawing shows.
These plates have been used for masking during sand blasting and powder coating.
Here my EUR 20,00 sand blasting cabinet.
Finally one sub base in position, waiting for the bearing block.




Title: Re: another Snow engine
Post by: Kim on October 17, 2014, 08:53:45 PM
Love your sand blasting cabinet Achim!

And the tile work is beautiful too :)
Kim

Title: Re: another Snow engine
Post by: vcutajar on October 17, 2014, 09:13:38 PM
Hi Achim

I love these homemade tools.  So, in your homemade blasting cabinet, is that an airbrush you are using and if so, do you put your blasting material in the airbrush reservoir?

Vince.
Title: Re: another Snow engine
Post by: fumopuc on October 17, 2014, 09:32:28 PM
Hi Vince, it is a special sand blasting gun.
 http://www.ebay.co.uk/itm/HS-178-Fine-Spray-Mini-Sandblaster-Air-Eraser-/110835382330?pt=UK_Crafts_DrawingSupplies_EH&hash=item19ce4db83a  (http://www.ebay.co.uk/itm/HS-178-Fine-Spray-Mini-Sandblaster-Air-Eraser-/110835382330?pt=UK_Crafts_DrawingSupplies_EH&hash=item19ce4db83a)
You can get it from the UK or China or may be also in Malta.
Title: Re: another Snow engine
Post by: vcutajar on October 17, 2014, 09:48:14 PM
Thanks for the info.  Everyday I learn new things about this hobby.

Quote
or may be also in Malta.

At that price I would not even bother to look for that here because it will surely be more expensive.

Vince
Title: Re: another Snow engine
Post by: fumopuc on October 26, 2014, 04:34:26 PM
Hi everybody, looking out of the window in the rooftop I can see the mountains (Alps) and there is a lot of snow since last week already. My Snow engine has some bearing blocks in the meantime. Nothing special so I will attach some pictures only.

Title: Re: another Snow engine
Post by: fumopuc on October 26, 2014, 04:37:47 PM
and next load.....

Title: Re: another Snow engine
Post by: fumopuc on October 26, 2014, 04:39:21 PM
and the rest of this shop session.

Title: Re: another Snow engine
Post by: Roger B on October 26, 2014, 06:49:32 PM
Shrink fitting bearings in the domestic oven, a brave man!

Coming along  :ThumbsUp: Snow is not quite down to our level yet.

Title: Re: another Snow engine
Post by: Don1966 on October 26, 2014, 08:37:12 PM
Achim I like the way you made all three pillar blocks and using your toaster oven for a bearing warmer is awesome. Nice work all the way around.

Don
Title: Re: another Snow engine
Post by: fumopuc on October 28, 2014, 06:57:26 PM
Hi Roger, Hi Don, thanks for watching and commenting. Since I have this discounter toaster oven in my shop, the relationship to my "First Lady" is more relaxed, because I do not use the kitchen oven anymore.
Title: Re: another Snow engine
Post by: fumopuc on November 02, 2014, 03:41:25 PM
Hi everybody, again some progress is done.
First I have reamed the second crankshaft bearing and done a first assembly with a simple shaft.
After fixing all the bolts of the bearing blocks, I took a deep breath and tried to turn the shaft.
Expecting that it will not be possible, I was totally surprised, that the shaft could easily turned. So the first reason for a happy dance like the pink elephant.
Next step is to give the final coating to the bearing blocks. Preparation as usual, all important faces are masked.
First time I have used my new toy, an airbrush spray booth. After the first usage it took me 2 Minutes to clean everything. A really very good investment. Found by accident at ebay. After usage it can be reduced to the size of a briefcase for storage.
So at the end of this day there are  really some part of this build collected and finally a short video of the first motion.


http://www.youtube.com/watch?v=BGKBqyp1EIo
Title: Re: another Snow engine
Post by: arnoldb on November 02, 2014, 04:09:33 PM
That looks great Achim  :ThumbsUp:

Nice find on the spray booth as well!

Kind regards, Arnold
Title: Re: another Snow engine
Post by: Roger B on November 02, 2014, 04:31:04 PM
I think that you would have definitely been in trouble for baking on the paint in the 'First Ladies' oven  ;)

Good progress  :ThumbsUp:
Title: Re: another Snow engine
Post by: Don1966 on November 02, 2014, 04:48:41 PM
Nice work Achim and I also like you spray booth. Isn't it great when all you hard work pays off. The brearing block came out great, nice and smooth.

 :popcorn:
Don
Title: Re: another Snow engine
Post by: fumopuc on November 04, 2014, 05:49:31 AM
Hi Arnold, Roger and Don, thanks for watching and the kind words. Next to be made, the crankshaft, but I think it will take some time. Comming weekend I have to do  some show preparation, because some members of our German Steam Forum (Dampfforum) will celebrate the 10th anniversary at this exhibition
 http://www.industriemuseum-lauf.de/noflash/Page2264.html  (http://www.industriemuseum-lauf.de/noflash/Page2264.html).
Most of us will be there at the secound weekend. It is a nice place, close to Nürnberg. An old factory building, close to the river.
Also on display in this museum  http://www.industriemuseum-lauf.de/noflash/Page1938.html  (http://www.industriemuseum-lauf.de/noflash/Page1938.html)
Title: Re: another Snow engine
Post by: fumopuc on December 21, 2014, 04:14:52 PM
Hi everybody, back to the Snow build.
I have started the crank shaft now.
Here quick and dirty some pictures, nothing special.
Title: Re: another Snow engine
Post by: vcutajar on December 21, 2014, 04:25:25 PM
What's the reason for heating the crank webs?

Vince
Title: Re: another Snow engine
Post by: crankshafter on December 21, 2014, 05:00:12 PM
What's the reason for heating the crank webs?

Vince
Vince.?
I think Achim heated them to get them separated from the glue. Se the third picture.
CS



Title: Re: another Snow engine
Post by: vcutajar on December 21, 2014, 05:12:01 PM
Yes.  That makes a lot of sense.

Vince
Title: Re: another Snow engine
Post by: fumopuc on December 21, 2014, 06:10:20 PM
Hi Vince, there are different possibilities to connect two single part for machining. One is soft soldering, let's say the old fashion way. Another one is epoxy glue. After gluing it together, I have put it into the oven, 180°C for 10 Minutes. You can start the machining immediately.
For the later separating after machining you need something around 250°C the glue will die and you have single parts again.
Title: Re: another Snow engine
Post by: Roger B on December 21, 2014, 06:42:25 PM
Hi Achim, glad you are back in the workshop. I don't think that that crank would fit in a Keats in my lathe  ::) Interesting idea using epoxy adhesives  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on December 24, 2014, 04:17:41 PM
Some days off, some progress. I have started with the further preparation of the crank shaft for the soldering.
Unfortunately, my marking in the material stock was wrong, I have expected to have a bar of 10 mm silver steel in stock, but in reality I have had only two bars of 9 mm, and the wholes in the crank webs are already prepared for a 10 mm crank pin. In the picture you can see a dummy from normal steel.
A quick call at my dealer was successful but the German Post (DHL) failed, so I have to wait until, may be Saturday, to get the silver steel.
I have been also lucky, that I have done a sample assembly, which shows me that the crank webs has been a bit to large, so there was a contact between the webs and the sub base.
In this stage it was easy to adapt that. The next pictures are showing the set up for the later soldering operation.
In the meantime I have started already the gear and distributor bracket.
In accordance to the latest version of the S/S Machine & Engineering ignition system some modifications are here necessary, which I have drawn first in the CAD.
Merry Christmas
Title: Re: another Snow engine
Post by: b.lindsey on December 25, 2014, 12:11:16 AM
Achim, nice to see you back in the shop and working on the Snow. Nice work on the crankshaft!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on December 25, 2014, 05:11:27 PM
Hi Bill, thanks for the friendly words.
It is Christmas now, but still no snow outside,  perhaps tonight.
There is only the snow engine build inside growing a bit.
I have made a dummy camshaft (a short one only) and a crankshaft dummy to check the gear train.
Also the distributor is already where it should be.
This collet blocks a doing really a nice job, specially if you need two worm screws for the shaft connection.
Finally everything in place and some "dummy" motion.   
Yq5T_PmEtR4
Title: Re: another Snow engine
Post by: vcutajar on December 25, 2014, 06:19:20 PM
What, Munich and no snow!  Usually it would be covered by now.

Vince
Title: Re: another Snow engine
Post by: Don1966 on December 25, 2014, 06:49:54 PM
The gears look nice Achim. Did you make them and the distributor?

Don
Title: Re: another Snow engine
Post by: fumopuc on December 25, 2014, 07:33:36 PM
Hi Don, the gears are available at Boston Gear via Amazon. They have shipped it to Germany for $ 7.
I have bought the complete ignition system from http://www.cncengines.com/snowengine.html including the  distributor.
Title: Re: another Snow engine
Post by: fumopuc on December 26, 2014, 01:29:55 PM
Hi everybody, now we have some snow in Munich, 3/4 of an inch and it is more geled water than snow.
Today I have worked at the distributor again. The distributor finger has a hole for the shaft only but now kind of dog. So I have decided to make one. First I have flatted the end of the shaft. Second I have made a small key (? do not know if the right word for it).
The intention was now to get this tiny part into the hole of the finger.I thing it is the smallest part I have ever made, 1,5 mm by 3 mm.
Epoxy glue should be the right answer for this job. To fix it in position I used the distributor shaft.
The candle in picture 04 is not there because it is Christmas, I have used the wax to give the shaft a thin coating.
My hope was, that after positioning the key (?) in the finger, I can pull the shaft out without taking this small part out again.
It worked in the  expected way, now I have to wait 24 h and we will see, if it still fits together than.
The gear/distributor bracket is also coated in the meantime.
Merry Christmas




 
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 08:59:31 AM
Still no silversteel for the crank shaft pin arrived on Saturday, so we will proceed with the ignition system.
I have made the magnet disk.
Fixed the magnets by some epoyx glue.
Cross Check if every south pole is facing to the sensor.
Final assembly and "opps", I need a special prepared allen key. In my case 1,3 mm, because the set screw in my version is M 2,5 mm.
Now I know, why Roy from S/S has added an allen key and a #3-48 set screw in his delivery of the ignition system, good guy, even if it was for my metric version useless.
Next to do, complete wiring and test of the ignition system, but have to make a bracket for the four plugs first.
Title: Re: another Snow engine
Post by: ogaryd on December 28, 2014, 12:40:38 PM
Have you checked your ignition system for spark? Mine wouldn't spark. I had to move the hall sensor from the side to the bottom of the distributer housing.
Gary
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 12:48:57 PM
Hi Gary, I am in the lucky position to say, yes we have sparks. Half an hour ago, I have made the test. Here is documentation of the result.
GH2eLATDuisWhat we need now, are only 4 combustion chambers and some valves.......
Title: Re: another Snow engine
Post by: b.lindsey on December 28, 2014, 01:05:44 PM
That is looking great Achim and with a good spark, half the battle is won!!  One question I have pondered though...given that opposites attract magnetically, and given the earth's North pole...doesn't the compass needle pointing North have to have a South pole characteristic on order to be attracted to the Earth's North pole. And if that is the case, wouldn't the pole of the Hall magnet attracting the compass needle therefore have to be North as well?  Obviously this isn't the case because yours worked and I have used the CDI ignition also and oriented the magnet the same as you did, but why?  Maybe someone can help me wrap my head around this question.

Bill
Title: Re: another Snow engine
Post by: ogaryd on December 28, 2014, 01:17:46 PM
I'm happy your ignition system sparked, :cartwheel: I have no idea why I had a problem. Continue the beautiful work, you'll have a runner soon. Thanks for taking the time to post your step by step build. Gary
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 01:21:54 PM
One question I have pondered though...given that opposites attract magnetically, and given the earth's North pole...doesn't the compass needle pointing North have to have a South pole characteristic on order to be attracted to the Earth's North pole. And if that is the case, wouldn't the pole of the Hall magnet attracting the compass needle therefore have to be North as well?  Obviously this isn't the case because yours worked and I have used the CDI ignition also and oriented the magnet the same as you did, but why?  Maybe someone can help me wrap my head around this question.

Bill


Hi Bill, your thoughts may be right. I have be not looking in this direction. I have done only, what Roy has written in his documentation:
"An important note is, that a South pole only triggers the sensor. An easy way to test this with a small compass. The South Pole of the magnet will attract the north needle of the compass."
That is exactly what I have done.
May be the reason is, that we are beside the north/south line of the magnetic field of the earth and not above or under ?


 
Title: Re: another Snow engine
Post by: vcutajar on December 28, 2014, 01:28:56 PM
Great job on getting the ignition working Achim.

Are those spark plugs homemade or did you buy them.

Vince
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 02:00:09 PM
Great job on getting the ignition working Achim.

Are those spark plugs homemade or did you make them.

Vince


Hi Vince, these are Rimfire VR2  spark plugs. You can by all over the world, i.e. here http://minimagneto.co.uk (http://minimagneto.co.uk)
Title: Re: another Snow engine
Post by: vcutajar on December 28, 2014, 02:09:34 PM
Guess you had to get an imperial tap for them.

Vince
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 02:14:49 PM
Guess you had to get an imperial tap for them.

Vince


Yes, it is 1/4 UNEF, very common in all RC engines with glow plugs, also all over the world. So no problem to get the taps.
Title: Re: another Snow engine
Post by: Don1966 on December 28, 2014, 04:30:25 PM
Cool Achim and bet your glad to get that out the way.   :ThumbsUp:


 :popcorn:
Don
Title: Re: another Snow engine
Post by: Roger B on December 28, 2014, 05:39:23 PM
Hi Achim, yet another step completed  :ThumbsUp:  :ThumbsUp: I don't know if I have missed something in the thread but where does the ignition distributor come from?

We now have around 30cm of snow and it's still falling.
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 07:10:48 PM
Cool Achim and bet your glad to get that out the way.   :ThumbsUp:


 :popcorn:
Don

Hi Don, yes I am very happy  that this test was successful. I have sent a lot of money to the states for this ignition system and I am very satisfied with what I have got.
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2014, 07:21:21 PM
Hi Achim, yet another step completed  :ThumbsUp:  :ThumbsUp: I don't know if I have missed something in the thread but where does the ignition distributor come from?

We now have around 30cm of snow and it's still falling.

Hi Roger, this afternoon I went Into the cellar to fetch my electrical little snow blower. It is his time now, we also getting more snow and the temperature is going down to minus 13° C.
The CDI system, including the distributor is from the states.
http://www.cncengines.com/snowengine.html
Title: Re: another Snow engine
Post by: fumopuc on December 30, 2014, 07:51:57 AM
Still waiting for the delivery of 10 mm silver steel for the crank pin. So some other work has to be done.
First thing was to increase the baseplate and to give the rotating flywheel a kind of protection.
Next job, the pulley for the water pump. If bought a suitable belt some week ago.
One picture shows the powder coated pulley at its final position already.
The very last picture is from the lump of aluminium, which I have squared last night. This should be the water pump housing later.
Title: Re: another Snow engine
Post by: Tonyr on December 30, 2014, 03:49:29 PM
You are making good progress Achim.
Looking really nice, superb quality.
Tony
Title: Re: another Snow engine
Post by: fumopuc on December 30, 2014, 07:35:54 PM
You are making good progress Achim.
Looking really nice, superb quality.
Tony
Thanks Tony, but  I am far away from your stage of the Snow build.
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 10:00:39 AM
Hi everybody and a Happy New Year.
Some progress with the parts for the water pump. The housing is nearly finished (with its functional dimensions) and the impeller is also nearly finished.
Here arwe some pictures of the progress.
I have tried first time a "furnace soft soldering process" in my discounter oven, with success, using normal plumber soldering paste.
Any kind of questions are welcome.
I will put all pictures in line into several postings.


 
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 10:02:52 AM
......and part #2
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 10:05:06 AM
....and part #3


next to do, the side cover with water inlet.
Title: Re: another Snow engine
Post by: vcutajar on January 01, 2015, 10:46:13 AM
Happy new year Achim.

Good idea of using the oven and solder paste for the impeller.  I have to remember that.

Vince
Title: Re: another Snow engine
Post by: b.lindsey on January 01, 2015, 02:45:43 PM
That turned out great Achim!  What kind of clearance is there between the impeller and the wall of the pump cavity?

Bill
Title: Re: another Snow engine
Post by: Don1966 on January 01, 2015, 03:10:43 PM
That came out great Achim and I will file that one away for later. I seen you seal, which I persume was the green object and can I ask where you found it? As the pump is just a volume pump I don't thing the impeller clearance has to be that good.

Don
Title: Re: another Snow engine
Post by: smfr on January 01, 2015, 06:08:35 PM
Very nice, Achim. I like the soldering in the oven!

Simon
Title: Re: another Snow engine
Post by: Kim on January 01, 2015, 06:32:15 PM
Nice work Achim.  Your impeller pump is looking very good.  Can't wait to see it work :)
Kim
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 06:42:19 PM
That turned out great Achim!  What kind of clearance is there between the impeller and the wall of the pump cavity?

Bill
Hi Bill, the axial clearens of the pump should be made by the impeller against the bronze bush in the pump body, adjusted by the later fitted pulley. If the impeller is in the requiered position, a small piece of paper, clamped between the impeller and the body could not be moved. So my estimation is, the gap is then less 1/10 mm. On the other side, I have marked the impeller with a blue Edding and turned around (picture impeller 4.0) and no cratches are visible.
So I must be at the right point.
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 06:54:34 PM
That came out great Achim and I will file that one away for later. I seen you seal, which I persume was the green object and can I ask where you found it? As the pump is just a volume pump I don't thing the impeller clearance has to be that good.

Don
Hi Don, the green object is a metric lipp seal with the dimension 8x14x4 millimeters. It is a"Volkswagen" spare part. I have choosen this because it is very close to the recommendation of Doug Kelley, who has used a 5/16" ID X 9/16" OD X 1/8" WIDE. This imperial lipp seal is also offered by S/S Machine & Engineering.
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2015, 08:09:38 PM
Simon, Kim, thanks for watching and the friendly comments.
Title: Re: another Snow engine
Post by: fumopuc on January 02, 2015, 05:40:16 PM
Water pump, the final stage. Nothing special, making the sidecover, some gaskets and the final machining of the body.
For a trial I have made an arbor to set the lip seal. I am still waiting for the delivery of this lipp seal, same dimension, but the "BA" type, completely covered with NBR material.
The last two shots are from the pump after powder coating, assembly and first successful trial in the bathroom.

Title: Re: another Snow engine
Post by: vcutajar on January 02, 2015, 06:26:16 PM
That looks really great Achim.  You are really moving forward at a fast pace.

Vince
Title: Re: another Snow engine
Post by: Kim on January 02, 2015, 06:50:29 PM
That's pretty sharp looking Achim!  And you've got it painted already and everything. You don't waste any time :)
Kim
Title: Re: another Snow engine
Post by: Roger B on January 02, 2015, 06:52:35 PM
Looking great Achim  :ThumbsUp:  :ThumbsUp: Do you do your own powder coating?
Title: Re: another Snow engine
Post by: fumopuc on January 02, 2015, 07:42:18 PM
Looking great Achim  :ThumbsUp:  :ThumbsUp: Do you do your own powder coating?
Hi Roger, yes. I am still using the WAI system.
http://www.nationsautoelectric.com/powdercoat.html
Title: Re: another Snow engine
Post by: fumopuc on January 02, 2015, 07:48:32 PM
Vince, Kim thanks for your friendly comments. Don't worry, my holidays will be over this weekend and I will slow down  immediately again.
Title: Re: another Snow engine
Post by: Roger B on January 02, 2015, 07:54:18 PM
Thank you for the link Achim, something else to understand, learn, buy  ::)
Title: Re: another Snow engine
Post by: Tonyr on January 02, 2015, 08:03:13 PM
Hi Achim,
Where did you get the powder coating kit from.
I cannot see it for sale in uk, did you buy it in Germany.
I am looking forward to seeing the engine finished, but please slow down you are starting to make me look bad.  :)
Tony
Title: Re: another Snow engine
Post by: fumopuc on January 02, 2015, 08:25:20 PM
Hi Tony, the WAI system was available in Germany some years ago in a 220 Volt version, but the American company has stopped the delievery 1 year ago. At the moment it is only possible to by an American 110 Volt System in the States and to use additionally a 220 to 110 Volt converter.
Or, may be this could be an option http://www.electrostaticmagic.co.uk/products/powder-coating-system-1

PS: Hi Tony, just looking into the German ebay and seeing sombody offers a 220 Volt version again.
http://www.ebay.de/itm/G-coat-Pulverbeschichtungssystem-Pulverpistole-Pulverbeschichtung-/191465158959?pt=DE_Haus_Garten_Heimwerker_Druckluftwerkzeuge&hash=item2c9436792f
Title: Re: another Snow engine
Post by: Tonyr on January 03, 2015, 10:28:32 AM
Hi Achim,

Thank you, I will look into it.

Tony
Title: Re: another Snow engine
Post by: fumopuc on January 04, 2015, 05:39:38 PM
Crankshaft final stage, hopefully. Today I have soldered the crankshaft. For me a massive job, but finally it seems to come to a good result. I will add some pictures and a short video in several postings again.
The green fluid, after the soldering is citric acid, water with nearly 5% of the acid.
I have done a pre heating in the oven up to 220°C more was not possible.

As usual feel free to give any comments or ask whatever you like.
Title: Re: another Snow engine
Post by: fumopuc on January 04, 2015, 05:41:02 PM
crankshaft final stage part 2.....

Title: Re: another Snow engine
Post by: fumopuc on January 04, 2015, 05:43:05 PM
and part 3...
Some motion, hopefully the crankshaft pin will be also O.K. I canīt check it at the moment.
Thanks for watching.


FGiWPlIE5xo
Title: Re: another Snow engine
Post by: smfr on January 04, 2015, 05:47:00 PM
Great job on the crankshaft soldering, Achim! The preheating is a good idea.

Simon
Title: Re: another Snow engine
Post by: Don1966 on January 04, 2015, 06:51:46 PM
Nice solder job On the crank Achim. Did you also make the bevel gear?

Don
Title: Re: another Snow engine
Post by: Roger B on January 04, 2015, 07:21:26 PM
Good work on the crankshaft  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Coopertje on January 04, 2015, 08:08:57 PM
Nice progress Achim, seems like a holiday well spend!

Regards Jeroen
Title: Re: another Snow engine
Post by: fumopuc on January 04, 2015, 08:09:08 PM
Nice solder job On the crank Achim. Did you also make the bevel gear?

Don
Hi Don, no, the gears are not a product of my home shop.
But generally, gear cutting is on my list of items to learn in near future.
Title: Re: another Snow engine
Post by: fumopuc on January 04, 2015, 08:12:34 PM
Simon, Don, Roger, Jeroen, thanks for looking and the kind words.
Title: Re: another Snow engine
Post by: Dave Otto on January 05, 2015, 12:21:55 AM
Nice work on the crankshaft Achim!

I have been enjoying your work on this project.

Dave
Title: Re: another Snow engine
Post by: Kim on January 05, 2015, 07:02:38 AM
Your crankshaft looks very nice Achim.  Still finding you're oven soldering technique pretty interesting!
Kim
Title: Re: another Snow engine
Post by: fumopuc on January 05, 2015, 03:42:18 PM
Hi evreybody, here a short video of my Snow engine, with an animated crank mechanism, as it is at the moment.
My days off are over now and I will slow done now again.
PvSv6pQFDCc
Title: Re: another Snow engine
Post by: Dave Otto on January 05, 2015, 03:56:21 PM
Nice!


Dave
Title: Re: another Snow engine
Post by: vcutajar on January 05, 2015, 06:57:18 PM
Smooth.

Vince
Title: Re: another Snow engine
Post by: b.lindsey on January 05, 2015, 06:59:23 PM
Oh that looks fantastic, glad you included the pump too in the video.

Bill
Title: Re: another Snow engine
Post by: Don1966 on January 06, 2015, 01:22:23 AM
Awesome Achim it looks fantastic.

Don
Title: Re: another Snow engine
Post by: fumopuc on January 06, 2015, 04:55:40 AM
Dave, Kim, Vince, Bill, Don thanks for watching and all your kind words.
It encourage me in getting  new ideas for further details.
I am just thinking about a kind of electrical cabinet to hide the ignition system.
Title: Re: another Snow engine
Post by: Roger B on January 06, 2015, 10:54:55 AM
Thank you for posting the video  :ThumbsUp: looks great  :praise2:  :praise2:
Title: Re: another Snow engine
Post by: Tonyr on January 07, 2015, 06:02:11 PM
Hi Achim,

I am having the same thoughts about the ignition system.
I am trying to think of a suitable looking box to hide it in.
The ignition is next on my list to fit to the engine.

Tony
Title: Re: another Snow engine
Post by: fumopuc on January 18, 2015, 05:40:13 AM
Project hidden CDI system
Hi everybody, I have found a solution for the electrical cabinet. Basis is a rectangle aluminium tube 60x40x2 mm.
The sub base is in accordance to the other parts of my Snow build.
If this engine hopefully will run some day, it could be useful to know if the CDI is switched on or not, So I have added an "ignition on control light".
This is a red LED, integrated in the top of the cabinet.
The accu pack has found a suitable place under the basement, directly under the electrical cabinet.


Title: Re: another Snow engine
Post by: b.lindsey on January 18, 2015, 03:17:54 PM
Nice solution Achim. It fits in well with the engine and hides the electronics while still giving you access when needed. I like it!

Bill
Title: Re: another Snow engine
Post by: Don1966 on January 18, 2015, 03:20:32 PM
Now Achim that is just too cool. I like..................... :praise2:


 8)
Don
Title: Re: another Snow engine
Post by: Dave Otto on January 18, 2015, 07:08:19 PM
Nice solution Achim :ThumbsUp:


Dave
Title: Re: another Snow engine
Post by: fumopuc on January 19, 2015, 07:07:26 PM
Bill, Don, Dave thanks for your positive comments. I appreciate it very much that you are still following along. It encouraged me to add more details to this engine build. Next to do the barring rack for turning the flywheel into the start position.
Title: Re: another Snow engine
Post by: Roger B on January 19, 2015, 07:30:19 PM
That's a really nice looking solution  :praise2:  :praise2: It reminds me of the old style electrical distribution cabinets you used to see on the streets and in factories  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on January 25, 2015, 04:42:51 PM
 Hi Roger, thanks for your kind comments.


I had to train  my skills with CNC and CAM again. So the decision was to make some drip oil pans, which will be positioned under the cams and rocker arms.
For this reason I have already modified the size of the aluminium basement against the original drawing.
The last picture is the start of my next job, the barring rack.
Title: Re: another Snow engine
Post by: vcutajar on January 25, 2015, 04:47:45 PM
Really love these small details you are doing Achim. :NotWorthy: :NotWorthy:

Vince
Title: Re: another Snow engine
Post by: Don1966 on January 25, 2015, 04:54:51 PM
Every details adds to the already beauty of the engine Achim, I love it.

Don
Title: Re: another Snow engine
Post by: Roger B on January 25, 2015, 05:32:58 PM
Very neat drip trays  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: b.lindsey on January 25, 2015, 06:40:15 PM
The drip pans are a very nice touch Achim. A great detail and functional ass well :)

Bill
Title: Re: another Snow engine
Post by: fumopuc on January 31, 2015, 10:29:44 AM
Vince, Don, Roger, Bill, thanks for watching and given kind comments. I have tried to fulfil all requirements of the "occupational safety". I know typical German.


Title: Re: another Snow engine
Post by: gbritnell on January 31, 2015, 01:20:46 PM
Fantastic detail as usual Achim. It's little touches like the ignition box that make a project stand out from the rest. I have seen quite a few of these engines built over the years and I must say that they were all built very well but none have the finishing touches of yours.
gbritnell
Title: Re: another Snow engine
Post by: Dave Otto on January 31, 2015, 03:43:31 PM
Hi Achim

Lots of little details going into this engine; I like the warning sticker you have made for the electrical enclosure. Can you tell us a little about the process that you used to make it and the the cutting machine seen in the picture?

Great Work!

Dave
Title: Re: another Snow engine
Post by: fumopuc on January 31, 2015, 05:17:34 PM
Hi Achim

Lots of little details going into this engine; I like the warning sticker you have made for the electrical enclosure. Can you tell us a little about the process that you used to make it and the the cutting machine seen in the picture?

Great Work!

Dave


Hi Dave,
this is the simple secret behind the stickers. I think a Chinese product, but offered and marketed in the US.
http://www.silhouetteamerica.com/shop/machines/portrait (http://www.silhouetteamerica.com/shop/machines/portrait)
The included software is able to import dxf files from the CAD.
The flash (picture) was found anywhere in the net, imported into the CAD and redrawn. Finally a dxf file was made.
In the plotter software any kind of scaling is possible, so I have cut to the size of 12 x 5 mm.
The plotter was bought 3 years ago, mainly for the purpose to cut any kind of gaskets.
Thanks for the compliment.
Title: Re: another Snow engine
Post by: fumopuc on January 31, 2015, 05:27:48 PM
Fantastic detail as usual Achim. It's little touches like the ignition box that make a project stand out from the rest. I have seen quite a few of these engines built over the years and I must say that they were all built very well but none have the finishing touches of yours.
gbritnell


Hi George, thank you very much for your compliment. It honours me of course very much if an experienced model engine maker like you is writing these kind words. I am always looking into your builds and I  recognize immediately that I will have a long way to go to reach your level. 
Title: Re: another Snow engine
Post by: fumopuc on February 08, 2015, 06:51:25 PM
Hi everybody, a little progress at this project. I have found some shop time and did some work with the brown stuff.
Also the barring rack has got more shape now.
Here some pictures at the end of the day.
Title: Re: another Snow engine
Post by: Roger B on February 08, 2015, 06:53:32 PM
It's coming along well  :ThumbsUp:  :ThumbsUp: Maybe I'll get to Munich this summer to see it in the metal  :)
Title: Re: another Snow engine
Post by: vcutajar on February 08, 2015, 07:28:23 PM
Good progress Achim.  Could you tell me the purpose of the top part of the barring rack?

Vince
Title: Re: another Snow engine
Post by: fumopuc on February 08, 2015, 07:57:38 PM
Good progress Achim.  Could you tell me the purpose of the top part of the barring rack?

Vince

Hi Vince, yes I can explane the purpose now, because I have been in contact with the guys at the Coolspring Power Museum, where such an engine is still running. This box at the real engine contains a weight preloaded electrical switch.
In one of the rectangle wholes in the fly wheel is a spring preloaded pin which will be moved by centrifugal force at 120 RPM. This pin get in contact with a lever of the switch and the ignition will be cut  off. So we have a kind of rev limiter with emergency cut off. In my case, it will be a fake only, but I was impressed by the system, so I am trying to show it.
Title: Re: another Snow engine
Post by: fumopuc on February 08, 2015, 08:10:28 PM
It's coming along well  :ThumbsUp:  :ThumbsUp: Maybe I'll get to Munich this summer to see it in the metal  :)

Hi Roger, as already mentioned earlier, you are welcome.
Title: Re: another Snow engine
Post by: vcutajar on February 08, 2015, 08:15:56 PM
Thanks for the info Achim.

Vince
Title: Re: another Snow engine
Post by: Don1966 on February 09, 2015, 12:11:27 AM
Nice to see you back at Achim and I do like the barring rack nice touch to an already great engine. On day I will tackle this project, as I have always loved the snow engine.

Don
Title: Re: another Snow engine
Post by: Dave Otto on February 09, 2015, 01:24:25 AM
Nice update Achim

I got to see two of the 6, 400hp Snow engines run at Heath Station PA one summer evening while attending the Coolspring show. This was before they were decommissioned (about ten years ago) and were still able to pump gas and did when the Waukeisha was down for maintenance; wow what a sight!

You are making great progress on your Snow.
Dave
Title: Re: another Snow engine
Post by: fumopuc on February 09, 2015, 05:50:36 AM
Nice update Achim

I got to see two of the 6, 400hp Snow engines run at Heath Station PA one summer evening while attending the Coolspring show. This was before they were decommissioned (about ten years ago) and were still able to pump gas and did when the Waukeisha was down for maintenance; wow what a sight!

You are making great progress on your Snow.
Dave


Hi Dave, I can imagine, that seeing one of this engines running directly in front of your eyes must be a really extraordinary show. May be one day I will get it managed to visit the Coolspring Power Museum and this at the same time when Cabin Fever or Names will be held so I can combine some special events.
Title: Re: another Snow engine
Post by: fumopuc on February 09, 2015, 05:55:44 AM
.... On day I will tackle this project, as I have always loved the snow engine.

Don


Hi Don, I am sure you will really do it, so I am waiting for your version of the Snow. If I go ahead with the same speed at this build I have done until now, you will have finished yours earlier. 
Title: Re: another Snow engine
Post by: fumopuc on February 22, 2015, 04:23:21 PM
Hi everybody, another small step is done.
The barring rack is finished now.
I have added a fake "ignition emergency cut lever" similar to the original one.
Next to do, the water cooling system should be finalised. So I have started with the water tank.
The side plates are milled from a 15 mm aluminium plate, the body is made from a rectangle aluminium tube.
Everything glued together with some epoxy glue. The first filling with water did not show any leakage.
Unfortunately my shop time is already over again for this weekend.


Title: Re: another Snow engine
Post by: Don1966 on February 22, 2015, 06:09:26 PM
Achim I like the way your water tank came out. Can you show more pictures of the fabrication? I would like to see how you did the bottom.

Don
Title: Re: another Snow engine
Post by: b.lindsey on February 22, 2015, 06:15:30 PM
That is looking fantastic achim!! All the little details add so much.

Bill
Title: Re: another Snow engine
Post by: fumopuc on February 28, 2015, 07:24:50 AM
Achim I like the way your water tank came out. Can you show more pictures of the fabrication? I would like to see how you did the bottom.

Don
Hi Don, there is no big secret in the fabrication of this tank. I have cut off a piece of the rectangular tube in the first picture and made some milled side covers in accordance to the tube. Everything glued together and making a successful leakage test,thatīs it. hopefully I will get more done over this weekend.


 
Title: Re: another Snow engine
Post by: fumopuc on March 01, 2015, 12:30:53 PM
Hi Everybody, today the chapter water tank should be nearly finished. Some 2,5 mm fastener are still missing. The tank is black now and the drain cock found his place. I have made some plumbing also and tried the milling operation with the reverse running boring head. Finally everything at the right place now.
Title: Re: another Snow engine
Post by: vcutajar on March 01, 2015, 01:38:25 PM
Good progress Achim.  Still following along.

Vince
Title: Re: another Snow engine
Post by: Don1966 on March 01, 2015, 04:59:30 PM
The water tank rocks Achim, did you also make the globe valve?

Don
Title: Re: another Snow engine
Post by: fumopuc on March 01, 2015, 07:30:00 PM
Hi Don, thanks for the kind words.. The globe valve is bought  at the same source where Vince has got his for the MEM Corliss. I am to lazy to make it by myself at the moment. It was disassembled and got the brass blackening process.
Title: Re: another Snow engine
Post by: fumopuc on March 10, 2015, 05:34:08 AM
Vince, thanks for following along.
Some plumbing was done over the weekend.
Water in and out are nearly finished. My choice for the brass tube made it a bit tricky because I have used a 7x0,3 mm tube for water out.
The holes in this thin tube, made for the matching tubes coming down from each cylinder, were drilled by using some fixtures.
Everything soft soldered, leakage test and powder coated.
Water in is also done, but leakage test and coating are still missing.
Title: Re: another Snow engine
Post by: fumopuc on March 15, 2015, 06:13:41 PM
Hi and Good Evening. Last week I have had a funny idea. I thought this engine model needs a operator stand. Similar to what I have seen in the different videos at CPM or at the Florida Fly wheelers. Next to do a design and finally some parts. Not finished yet but on a good way.


Title: Re: another Snow engine
Post by: Roger B on March 15, 2015, 06:33:10 PM
That's a very neat detail  :praise2:  :praise2: Still following and enjoying  :wine1:
Title: Re: another Snow engine
Post by: vcutajar on March 15, 2015, 10:52:26 PM
Quote
Last week I have had a funny idea.

I know the feeling and that is why I take so long to finish anything.  The extra details you are putting in your engine are really good.  I like.

Vince
Title: Re: another Snow engine
Post by: b.lindsey on March 15, 2015, 11:35:43 PM
Yet another nice detail Achim. It will all come together in the end to make an exceptional model!!

Bill
Title: Re: another Snow engine
Post by: Don1966 on March 15, 2015, 11:49:11 PM
Wooooo! Brass and a nice addition to a awesome engine built. Every detail makes it stand out that much more Achim.  :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: Dave Otto on March 16, 2015, 12:31:38 AM
Very nice Achim!

I completely missed the plumbing update; you are making good progress. How did you blacken the brass plumbing parts?

Dave
Title: Re: another Snow engine
Post by: fumopuc on March 16, 2015, 05:17:09 AM
Roger, Vince, Bill and Don thanks for looking and your always friendly comments.

Very nice Achim!

I completely missed the plumbing update; you are making good progress. How did you blacken the brass plumbing parts?

Dave

Hi Dave, the brass tubes are powder coated. The usual process with one exception. Due to the size I had to go into complicated negotiations with my First Lady, because of the need to use here kitchen oven for this operation.
Title: Re: another Snow engine
Post by: fumopuc on March 22, 2015, 12:09:58 PM
Operator stand, final stage.
I have made the switch box and also the big lever for what ever it will be used.
Special picture for Don, nearly everything in brass, last time.
This morning I have done the powder coating, all parts at the "clothes line" for cooling down.
There are some really tiny bits, i.e. the small red hand wheel (d=6mm), I have lost it to the shop gnome, but after offering him an other piece of brass, I got it back from him.
It took me 5 Minutes searching in the chips pan under the lathe.
Finally everything assembled and a view from the operators place.
 
Title: Re: another Snow engine
Post by: Don1966 on March 22, 2015, 02:11:54 PM
Achim that has added a real nice touch to an already exceptional engine. Pity to paint the brass.......... :stickpoke:

Don
Title: Re: another Snow engine
Post by: Roger B on March 22, 2015, 06:24:05 PM
Splendid  :praise2:  :praise2: (Just my 10 Cents worth to match the picture  :) )
Title: Re: another Snow engine
Post by: gldavison on March 23, 2015, 02:08:42 AM
Excellent job on the Snow Achim. You have inspried me to get onto powder coating. I hope to do the tubing on my Snow. This brings up a question.
 
What temperature are you using to to cure the powder? The instructions I have use 400F degrees (204.4C) .  I would have thought soft solder would melt at that temp.

Gary
Title: Re: another Snow engine
Post by: fumopuc on March 23, 2015, 05:42:08 AM
Hi Gary, thanks for the compliment.
The oven temperature is always adjusted to 180° C.
For checking the right temperature I am using a cheap Chinese Laser Pyrometer. So I am able to measure the temperature of the part during the process. Between 160°C and 180 °C is always a good range  to burn it into the surface. Melting of the powder starts already at around 100°C to 120°C.
For the soft soldering I have used some tin-solder with 220°C melting point, so I am out of the critical range.
If you are not sure with your soft solder, try it with only, i.e. 150°C, to get the powder on a sample part with your used soft solder.
Title: Re: another Snow engine
Post by: fumopuc on April 06, 2015, 04:03:16 PM
Roger, Don thanks for the always kind comments.
At the moment I am just fiddling around and making some bits and pieces for the fuel tank.
Mostly in accordance with the drawings, only the baseplate is a little bit different.
Time to train my CNC skills again a bit.
At the moment I am missing some Lucite/Plexiglass for the one side cover of the tank, but it is ordered.
Title: Re: another Snow engine
Post by: fumopuc on April 19, 2015, 05:01:11 PM
Hi everybody. Fuel tank, next step. A fuel nipple was made, some powder coating, and an emergency fuel drip pan. I had to do something, what covers the two ugly studs and nuts, which fitted the base plate to the wooden base.
Still missing the coating at the drip pan, the fuel filler cap and the final assembly of everything.
Title: Re: another Snow engine
Post by: vcutajar on April 19, 2015, 07:25:30 PM
Hi Achim

Still following your progress and missing my build.

That hex block in the chuck in your first photo reminded me that I need to get something like that whilst here in the UK.  I believe there is a set with a hex and square block.  Now if I can just remember what they are called!

Vince
Title: Re: another Snow engine
Post by: fumopuc on April 19, 2015, 07:53:25 PM
Hi Vince, may be this will guide you.
http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Fixtures
Concernig missing your build, unfortunately I can't help.
Title: Re: another Snow engine
Post by: vcutajar on April 19, 2015, 08:05:52 PM
Thanks Achim for the link. Those are the ones.

Vince
Title: Re: another Snow engine
Post by: Roger B on April 19, 2015, 08:14:23 PM
Some more nice looking details as ever  :ThumbsUp:  :ThumbsUp: Still following along  :wine1:
Title: Re: another Snow engine
Post by: Don1966 on April 19, 2015, 11:13:35 PM
Achim the tank came out great. What was it made of and did you loctite both end and the inlet and outlet?

Don
Title: Re: another Snow engine
Post by: b.lindsey on April 20, 2015, 01:06:42 AM
Beautiful work as always Achim. The tank turned out very well!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on April 20, 2015, 05:17:32 AM
Achim the tank came out great. What was it made of and did you loctite both end and the inlet and outlet?

Don

Hi Roger, Don and Bill thanks for the friendly words.
Don, the tank is made from a 40x2 mm aluminum tube, was available in my scrap box.
To glue everythink together a 2 component epoxy glue was used.
http://www.uhu.com/en/products/epoxy-adhesives-2-component/detail/uhu-plus-endfest-3002-k-epoxidharzkleber-1.html?cHash=af94212bcfe4015a4922aafc50591775&step=0
If it will be heated in the oven, 150°C, 10 minutes than it is connected in a very short time.
The fuel nipple and plexiglass cover was glued in place after powder coating, normal setting time at room temperature.
Title: Re: another Snow engine
Post by: fumopuc on May 03, 2015, 02:39:52 PM
wood, tiling and electrical gremlins......
Hi everybody, after some gardening some further progress at the snow build.
First I have finished the drip pan under the fuel tank and the tank itself, now hopefully final assembled, the pressure test was fine.
I didnīt forgot the breather hole in the filler cap. It has eaten the half of my 1mm drill bit and I had to sacrifice on side of a 2mm centre drill to get it out again.
I have drilled from the other side with the centre drill until I could feel a light resistance, than I took the rest of the broken 1mm drill bit and used it as a pin to kick the broken rest out. See picture 01.

Next step, a wooden cover for the water tank. I thought in reality it is not good, that the tank has no cover. On the other side it needs some surface to cool the water down. So I have made a cover on some beams, that there is still the possibility of air flow between water surface and cover. Picture 02 and 03.

All additional sub bases are done, so I could start with the final tiling (glueing). Nearly everything is done, with the exception of the area with my temporary belt drive and electrical motor. The earlier made jig for the tiling was a big help to collect some small pieces and make new bigger customised ones.The grouting will be done later. Pictures 05, 06, 07, 08.

Next on my schedule, a final check of the modified CDI sytem. Unfortunately it failed, no sparks any more.
After playing around and trying different adjustments, I have had a cup of coffee and was thinking that may be I have killed the hall sensor for any reason.
Than if tried to remember what I have changed since last Christmas, when the system was running perfect in the first test.
The major change was the red LED which I have put into the power circle behind the switch, which are indicating that power is switched on. This was done by an Y cable with the LED and a resistor. I took it of, going back to the original layout from S/S Machine & Engineering and the sparks have been back.
I didnīt understand why, so I have sent a mail to Roy, may be he will find the time to explain me the reason, or may be somebody of you guys has any idea what I could have done wrong with the LED in the power circle. Picture 09.
Finally I have done all the surroundings now, so I can start with the cylinder unit.
Title: Re: another Snow engine
Post by: mike mott on May 03, 2015, 02:59:34 PM
Achim, the tiles look really neat as does the rest of the model.

Mike
Title: Re: another Snow engine
Post by: Dave Otto on May 03, 2015, 04:06:57 PM
Hi Achim

I'm still following along with your beautiful work on your Snow engine. It is interesting to see the parts finished as you go; it seems that most people wait until the end (me included) to do the finish work on their models.

Dave
Title: Re: another Snow engine
Post by: Kim on May 03, 2015, 04:08:31 PM
Wow, that is beautiful Achim!  You have a work of art here.
Kim
Title: Re: another Snow engine
Post by: Don1966 on May 03, 2015, 04:51:43 PM
Hi Achim,
The snow is turning into a thing of beauty. You have done some amazing work on this already beautiful engine to make it stand out. Thanks for taking us along................I like.................... :praise2:

By the way the LED should not effect the operation of the ignition circuit. Maybe it was a loos connection and when you removed the LED the circuit started working. You did connect the LED in parallel with the power?

Regards Don
Title: Re: another Snow engine
Post by: vcutajar on May 03, 2015, 05:05:21 PM
That is really looking great Achim.  Can you remind me, what's the size of the base?

Vince
Title: Re: another Snow engine
Post by: fumopuc on May 03, 2015, 05:17:31 PM
Mike, Dave, Kim, Don thanks for your friendly comments.


Dave, it is the first time that I do it in this way. Last time when I have built the 16 valve engine, the engine was running and I had to do all the tiling and cosmetics.
The first parts like gears, piston rings and ignition system for the Snow engine already ordered. In my brain I was doing the Snow already and my hands had to do all the remaining work for the 16 valve engine. I want to avoid that felling this time so I have done it opposite way this time and to be honest I like it.
In real life, i.e., if you build an race engine, than normally it will be assembled, dyno check and than ready to use, nobody will disassemble this engine again before it will be used.


Don, may be your are right and I have to the check the Y cable. The LED is working, could be seen in the last picture right down in the corner, but I have never checked until today if power is at the remaining Futuba connector. I will do that. Here a picture of my simple add on.




 
Title: Re: another Snow engine
Post by: Roger B on May 03, 2015, 07:27:37 PM
Looking excellent  :praise2:  :praise2:

I don't understand your ignition problems either unless there is a problem with the Y cable  :headscratch:
Title: Re: another Snow engine
Post by: fumopuc on May 03, 2015, 07:37:04 PM
That is really looking great Achim.  Can you remind me, what's the size of the base?

Vince

Vince, the base is 829 x 288 mm. Fly wheel diameter is 240 mm.
Thanks for the friendly words.
Title: Re: another Snow engine
Post by: b.lindsey on May 03, 2015, 08:26:18 PM
More beautiful work achim. Still following along here.

Bill
Title: Re: another Snow engine
Post by: tvoght on May 03, 2015, 10:05:57 PM
The detail work on this machine is spectacular, Achim.

--Tim
Title: Re: another Snow engine
Post by: fumopuc on May 04, 2015, 08:23:54 PM
Roger, Bill, Tim thanks for following along and the friendly comments. It encouraged me to go ahead with own ideas. Now I have started with the cylinder units. The first liner is raw turned  and the following modifications  will be driven by metric availability of stock material and fasteners only. May be I will modify  the cylinder pedestals a bit.
Title: Re: another Snow engine
Post by: fumopuc on May 09, 2015, 02:07:18 PM
My CDI system is back in business now, with the power indicating LED. I have made a new Y cable, the old one has had a lose contact in one socket.
So Don and Roger your analysis was absolutely right. It was also the recommendation from Roy at S/S to check this issue.
The new cable has a 900 Ohm resistor now, so the LED is not so bright any more.
We have the indicated power "on" now, and we have sparks.
Ie4K9w6_0ig
Title: Re: another Snow engine
Post by: Roger B on May 09, 2015, 02:19:32 PM
 :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Don1966 on May 09, 2015, 02:49:04 PM
Excellent Achim!   :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: vcutajar on May 09, 2015, 08:39:59 PM
Thumbs up from Nuremberg.  Nice weather you are having in Bavaria.

Vince
Title: Re: another Snow engine
Post by: Art K on May 09, 2015, 08:54:26 PM
Achim,
I got all caught up with your build, what can I say but wow!
Art
Title: Re: another Snow engine
Post by: fumopuc on May 17, 2015, 11:57:51 AM
Roger, Don, Vince and Art thanks for your always friendly comments.


I have made a little progress, but nothing special.
All the jobs, I am sure, you have see several times at this engine build.
The liners and cylinder cases are made on the lathe.
On extra case is scrap, because I have to learn again to read the hand wheel scale correct.
Everything soldered together, same procedure as usual, a lot of flux, preheated in the toaster oven and than two flames and some patience, finally the bath in citric acid.
After cleaning the cylinders at the lathe, a pressure test with air in a water bucket was made, it seems to be fine until now, letīs wait until final machining is done.
I will start the final machining of the line bore now, in accordance to my 27 mm piston rings.




Title: Re: another Snow engine
Post by: fumopuc on May 17, 2015, 06:39:02 PM
Sunday, step two.....
The liners are machined to final diameter, 27 mm in my case.
The honing operation was successful.
One piston ring in position. The gap looks reasonable.
The mandrel/arbor is already finished, which will be used for some of the following operations.
Finally the status of the late afternoon, next steps will follow soon.




Title: Re: another Snow engine
Post by: ICEpeter on May 17, 2015, 08:30:03 PM
Hello Achim,
I have been following your posts and really like what I am seeing. Great stuff and excellent workmanship.

On another subject and since I know you know Mueller, Nick outside of Munich, I was wondering what Nick is up to these days since I can't find any recent postings from him on any of the sites he posted on earlier (Peter's CNC Ecke, for example) Do you know what is going on there? Also, are you familiar with "SpureinsAchim" also from Peter's CNC Ecke? He is also very quiet recently? Would appreciate a little feed back if you have any info.

Enjoy the rest of Sunday!

Peter J.
Title: Re: another Snow engine
Post by: fumopuc on May 17, 2015, 09:10:51 PM
Hi Peter,  just sent a PM.
Title: Re: another Snow engine
Post by: Don1966 on May 17, 2015, 10:11:13 PM
Nice to see some progress Achim and it looks great so far. Still with you my friend.

Don
Title: Re: another Snow engine
Post by: Dave Otto on May 18, 2015, 01:06:05 AM
Great progress Achim.

This is a lot of work in those cylinders and they are shaping up nicely.

Dave
Title: Re: another Snow engine
Post by: fumopuc on May 23, 2015, 04:46:40 PM
Peter, Don, Dave thanks for watching and commenting positive about my build log.


Cylinder shaping up next steps.
I am sure you all know about this, so only some pictures about my progress.
To mill the recess, I have been encouraged and I took the assumed middle of my collet block as a reference, I have never checked before if it is true.
So I have milled both cylinders at the bottom surface  without changing anything at the mill, except changing the cylinder with the arbor into the collet block.
We will see later how accurate and equal they are now.
 





Title: Re: another Snow engine
Post by: Kim on May 23, 2015, 05:28:26 PM
You're cylinders look very nice to me Achim!
Kim
Title: Re: another Snow engine
Post by: sco on May 23, 2015, 07:30:31 PM
Thats quite an overhang from the chuck Achim - couldn't you get some tailstock support in there?

Simon.
Title: Re: another Snow engine
Post by: b.lindsey on May 23, 2015, 11:48:24 PM
Those look great Achim. Nice to see an update on this project.

Bill
Title: Re: another Snow engine
Post by: Dave Otto on May 24, 2015, 12:50:07 AM
Nicely done Achim!

Dave
Title: Re: another Snow engine
Post by: fumopuc on May 24, 2015, 04:41:51 AM
Thats quite an overhang from the chuck Achim - couldn't you get some tailstock support in there?

Simon.

Hi Simon, I was worried a bit also. To feel better I have put a clock at the outer diameter and tried to push by my hands.
There was no real movement visible, so I decided to go for it without any additional support.
Title: Re: another Snow engine
Post by: fumopuc on May 24, 2015, 06:38:25 PM
Kim, Bill, Dave thanks for watching and the friendly words.


We have a long weekend here in Germany, some extra shop time is available.
The cylinders are nearly finished now. The final machining went well.
Had to make the holes for fitting, the holes for water inlet  and the holes for the outlet flanges.
For the hole pattern of the cylinder heads I made a CNC program, it will be used 16 times for all following components.
To be sure that everything is fine, I have used my scrapped extra cylinder case as a sample part at the CNC.
Tomorrow I will check the CNC master with a fresh brain before I will start to machine the real cylinders.
Title: Re: another Snow engine
Post by: fumopuc on May 25, 2015, 11:42:04 AM
The final status for this long weekend.
Yesterday I have made a short video of my CNC milling machine doing the hole pattern at the sample part.
I thought it is funny to watch with eightfold speed.


Xd5__WDF42w
This morning, after checking my drawing and CAM data again I have machined my cylinders.
I was worried very much about the 2,5 mm drilling in steel with the CNC, so I have set the drill program to a complete pull-back at every 1,2 mm.
The holes are 12 mm deep so I had the opportunity to give 10 times some coolant/cutting fluid into the hole by a brush.
The brush nearly lost all its bristles, but I didnīt lost a part or a drill.
So finally I am happy, also that I have to clear the mess on my mill and bench now.


Title: Re: another Snow engine
Post by: ozzie46 on May 25, 2015, 01:44:49 PM
Nice job. Really looking forward to seeing the completed and running engine.

Ron
Title: Re: another Snow engine
Post by: Don1966 on May 25, 2015, 03:56:58 PM
That came out looking great Achim. The cylinders look a treat.......... I like.......... :ThumbsUp:


 :popcorn:
Title: Re: another Snow engine
Post by: fumopuc on May 27, 2015, 06:49:03 PM
Nice job. Really looking forward to seeing the completed and running engine.

Ron
Hi Ron, thanks for watching and the friendly comments.
Yes, me too. Looking forward to see the engine hopefully running, but that will be a longer way, I am afraid.
Title: Re: another Snow engine
Post by: rarach22 on May 27, 2015, 08:50:01 PM
Realy nice, beautiful work :ThumbsUp: Pavel
Title: Re: another Snow engine
Post by: Roger B on May 28, 2015, 07:45:31 AM
Just catching up during a short break from travelling. Excellent progress with the cylinders  :praise2:  :praise2: That's a lot a lot of parts and holes to drill  ::) I was a little confused as to why the larger holes were so close to the bore on your trial piece, then I realized that it did not have a liner fitted  :headscratch:
Title: Re: another Snow engine
Post by: fumopuc on May 30, 2015, 05:14:51 PM
Don, Pavel, Roger, thanks for watching. I appreciate it very much that you are all still following along.


After cleaning all machines from the steel swarf from cylinder making, I could not leave it clean like it was.
So some new aluminium swarf now.
The pedestal are coming out of a lump of aluminium.
Last picture in front is my dummy sub base, which will be used for all following sample assembling.
Title: Re: another Snow engine
Post by: smfr on May 30, 2015, 07:13:16 PM
Very nice, Achim. I like your lighting arrangement around the spindle; looks very handy.

Simon
Title: Re: another Snow engine
Post by: fumopuc on May 30, 2015, 07:23:18 PM
Hi Simon, easy to make.
http://www.ebay.de/itm/Portable-48-LED-Lantern-UFO-Camping-Tent-Umbrella-Light-C18-/381132266162?pt=LH_DefaultDomain_0&hash=item58bd40dab2

Title: Re: another Snow engine
Post by: fumopuc on June 07, 2015, 05:31:38 PM

Hallo everybody.Some progress as a result of a long weekend. The last one until fall.
The cylinder pedestals allow now also the water in piping.
Next to do was to start with the combustion chambers.
I though the easiest way would be to make an arbor/mandrel , machine them in one set up and they will be parallel.
The rest was done on the mill, so they do have already the four areas around.
We have five pieces now, so one will be the set up part for the CNC mill to check/test all following operations.
Title: Re: another Snow engine
Post by: Don1966 on June 07, 2015, 06:28:01 PM
Good to see more progress Achim. You sure make a lot of swarf................. :ThumbsUp:

 :popcorn:

Don
Title: Re: another Snow engine
Post by: fumopuc on June 09, 2015, 04:49:56 AM
Hi Don, thanks for watching and giving comments. There is really a lot of swarf. The aluminium bar Stock was 60 mm outside diameter and has very big holes inside now. This model anyway is part of the "bigger"  and heavier category.
Title: Re: another Snow engine
Post by: fumopuc on June 13, 2015, 10:54:23 AM
Its plotter time again. This morning I have made some head gaskets for the snow engine, 0,4mm gasket material. It is always fun to see the plotter doing his job.
Mostly  I do a normal copy paper sample first and the adjusting of the blade for the thicker material later.
Title: Re: another Snow engine
Post by: fumopuc on June 13, 2015, 07:00:34 PM
... and the cnc drilling of the combustion chambers. The sample/set up part is still alive. In this case I am very happy to have the CNC milling machine, it is a big help for so much equal operations. Next to do is the final machining of these parts with the holes for the spark plugs, the holes for the valve blocks and the fixation of the camshaft brackets.
Title: Re: another Snow engine
Post by: joe d on June 13, 2015, 09:33:05 PM
Making some good progress, Achim.  I'm enjoying following along.

Cheers, Joe
Title: Re: another Snow engine
Post by: Roger B on June 14, 2015, 07:50:50 AM
Moving along nicely  :ThumbsUp:  :ThumbsUp: CNC certainly seems to make the repetitive parts easier.
Title: Re: another Snow engine
Post by: kvom on June 14, 2015, 02:20:49 PM
For drilling my F&S program specified peck distance equal to the drill diameter.  You were a bit conservative,  but nothing wrong doing that.  What is the rapid speed on your mill?

Title: Re: another Snow engine
Post by: fumopuc on June 14, 2015, 08:21:00 PM
For drilling my F&S program specified peck distance equal to the drill diameter.  You were a bit conservative,  but nothing wrong doing that.  What is the rapid speed on your mill?
Hi Kvom, ( I have tried to remember your first name, but I failed. Bill has mentioned it in the Cabin Fever thread but I could not find it.) yes I am still very conservative with the feed, specially with the small drill bits. My little Proxxon CNC mill has 2300 rev/min as maximum speed.
Today I have tried more than the drill diameter in Aluminium and it was fine, but also added some coolant.
Title: Re: another Snow engine
Post by: Don1966 on June 16, 2015, 12:11:11 AM
Looks like your making a lot of progress Achim. Those cylinders are looking great and love the gasket printer. Still following you and taking notes.

 :popcorn:

Don
Title: Re: another Snow engine
Post by: b.lindsey on June 16, 2015, 12:48:55 AM
That gasket printer is slick Achim!!  Can you provide a few more details on it?

Bill
Title: Re: another Snow engine
Post by: fumopuc on June 16, 2015, 05:15:34 AM
That gasket printer is slick Achim!!  Can you provide a few more details on it?

Bill
Hi Bill, the cutter is a product of your country. I am sure it is made in Asia but the company is based in the US.
http://www.silhouetteamerica.com/shop/machines/portrait
I have spent the money 2 years ago and I have never regret it.
Title: Re: another Snow engine
Post by: fumopuc on June 16, 2015, 07:51:05 PM
Don, Joe, Roger thanks for watching. Good to know that I am still under observation, so I have to be careful with what I show and I write here.
I didnīt find the time to add the pictures from last Sunday here, so here they are.
Mostly my computer and the CNC mill have been busy, I have been watching lazy and only giving some drips of coolant into the holes and on the drill bits.
The swarf is still on the bench I will clean it later. Last thing to do is the tapping of the M3 and M 2,5 threads.

Title: Re: another Snow engine
Post by: Dave Otto on June 16, 2015, 09:33:08 PM
Very nice work Achim, your parts are beautiful!

I remember looking at the cutting machine back when you were making the decals for the power enclosure; I never had given a thought to using if for cutting gaskets. Do you have to use their software or is there a way to import a CAD file (DXF)?

Dave
Title: Re: another Snow engine
Post by: Don1966 on June 17, 2015, 12:05:50 AM
Oooooh! Nice shiny cylinder heads,  :Love: your catch up with me Achim. Seeing the family shot of the cylinder and heads, she's shaping up.  :cartwheel:

 :popcorn:

Don
Title: Re: another Snow engine
Post by: fumopuc on June 17, 2015, 06:11:32 AM
Very nice work Achim, your parts are beautiful!

I remember looking at the cutting machine back when you were making the decals for the power enclosure; I never had given a thought to using if for cutting gaskets. Do you have to use their software or is there a way to import a CAD file (DXF)?

Dave
Hi Dave, their software is necessary to run the plotter. There are a lot of adjustments done by the software, i.e. for the thicker materials like gasket paper, the cutting speed will be reduced and the knife will be leaded twice on all outlines.
There is no need to use the drawing section of their software. With the DXF Import function you will get the CAD prepared gasket drawing direct in their library and into the cutting section. Very easy to handle and to adjust.
My first cut copy paper sample was a bit tight at the dimension for the big inner hole. So an adjustment in CAD was made to that dimension  by increasing the circle with 0,2 mm, a new import and sample cut and the problem was solved.
Title: Re: another Snow engine
Post by: fumopuc on June 27, 2015, 07:21:29 AM
Hi Don, thanks for watching. Sorry I have covered the shine now.
A couple of days ago I have made the powder coating of the cylinders and the pedestals.
The challenge was to coat only the outside visible surface and to keep the seat of the cylinder and the faces to the combustion chambers  free of any coating.
Basic idea was to do some masking with covers and tape. From earlier experience with the powder I have put the masking tape this time on the covers and not to the part itself.
The changeover from part to tape is always critical, because of powder collection at this line.
The masking worked very well in my opinion, but during the degreasing I have done a mistake.
My target was to coat the two water in tubes in the same colour like the cylinders. So they should be in place before coating. I have done this with epoxy glue and as usual, it was heated in the toaster oven.
After this I have been at bit impatient and made the degreasing with a brush and chemical gun degreaser to the part when it was still hot, approximately 50° C.
The result could be seen unfortunately after the coating process. The degreaser was partly vaporised before he has done his complete job, so some rest of oil and cutting fluid was still at the surface. The result is a partly not so well coating surface in some areas and I have learned something for the future.
In this case it is like it is and it will be a special of this build.
Finally it is looking not perfect but I can live with that.
Title: Re: another Snow engine
Post by: Roger B on June 27, 2015, 07:37:03 AM
Looks excellent to me  :praise2:  :praise2: When you make things you notice every little imperfection that no one else will ever see  ::)
Title: Re: another Snow engine
Post by: fumopuc on June 27, 2015, 09:26:37 AM
Looks excellent to me  :praise2: :praise2: When you make things you notice every little imperfection that no one else will ever see  ::)
Hi Roger, thanks for the friendly words.
But you will see, if you look from the right angle.
cylinder #01 is worse.
cylinder #02 is better.
Title: Re: another Snow engine
Post by: fumopuc on July 04, 2015, 01:20:17 PM
Hi everybody, here the up date from last week end.
Shop time is rare at the moment.
The cylinder heads are nearly done now.
To get the faces 100% parallel, I have made them all in one set up.
For the water jacket the accuracy is not so important, so I have made two layout templates and the machining was controlled visuall only.

Title: Re: another Snow engine
Post by: Don1966 on July 04, 2015, 04:18:51 PM
Cylinder heads look good Achim. We should be getting a family shot pretty soon. Nice work!


 :popcorn:
Don
Title: Re: another Snow engine
Post by: fumopuc on July 04, 2015, 08:20:59 PM
Hi Don, thanks for watching. Next to do is the well known hole pattern into the cylinder heads and the final covers for each side.
That will be the point for the next family shot.
Hopefuly tomorrow I will find some shop time again.
Title: Re: another Snow engine
Post by: b.lindsey on July 05, 2015, 12:35:28 AM
Just getting caught up with your progress Achim. It sure is shaping up nicely and you have gotten a lot  done since I last looked.

Bill
Title: Re: another Snow engine
Post by: Dave Otto on July 05, 2015, 01:16:41 AM
Good to see more progress on the Snow Achim.

The heads are coming along nicely.

Dave
Title: Re: another Snow engine
Post by: fumopuc on July 05, 2015, 06:48:30 PM
35°C outside in the shadow, 33°C in my shop this afternoon.
Plan was to feed the CNC milling machine and no further action or motion of myself.
From some remaining parts and fixtures I have made a new fixture for the drilling operation of the cylinder head.
The CNC mill was clocked to the centre of the fixture and the cylinder heads could be fixed easily one after the other.
Later in the afternoon I have made the 30 M2 threads with sweat running over my face.
Finally some more parts are nearly made. The bronze bush, which is guiding the piston rod, is still missing, but this will be done later.
The last picture shows all available cylinder parts assembled on my temporary dummy sub base. 


 
Title: Re: another Snow engine
Post by: Roger B on July 05, 2015, 07:07:29 PM
Coming along well  :ThumbsUp:  :ThumbsUp:  36°C outside, mid 20s in the cellar so that's where I spent my day  :)
Title: Re: another Snow engine
Post by: Admiral_dk on July 05, 2015, 09:19:07 PM
Nice progress again - looking good  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on August 02, 2015, 05:26:54 PM
Thanks Admiral for the kind comment.


Hi everybody,after some weekends being outside, today some further progress in the shop.
I have made the cylinder head covers and the gaskets.
So the water jackets in the cylinder-heads are closed now.
As always,a fixture has to be made to get the parts clamped  at the CNC mill.
Gaskets has been made with the plotter as always.
Next to do the cylinder connector.
Title: Re: another Snow engine
Post by: Don1966 on August 02, 2015, 07:59:02 PM
Achim you been sneaking in some extra post while I wasn't looking. The cylinders and covers are starting to look great. I like....................  :praise2:

 :popcorn:

Don
Title: Re: another Snow engine
Post by: Dave Otto on August 03, 2015, 01:31:14 AM
Very nice Achim!

The cylinder assemblies are coming along nicely.

Thanks for the update,
Daev
Title: Re: another Snow engine
Post by: Roger B on August 03, 2015, 07:56:53 AM
That's some good progress  :ThumbsUp:  :ThumbsUp: Are you using your CNC for drilling the fixing holes?
Title: Re: another Snow engine
Post by: fumopuc on August 03, 2015, 11:18:59 AM
That's some good progress  :ThumbsUp:  :ThumbsUp: Are you using your CNC for drilling the fixing holes?
If I have made a CAM program, yes.
Title: Re: another Snow engine
Post by: fumopuc on August 15, 2015, 05:12:41 PM
Don, Dave thanks for stopping by and the friendly words.
In the meantime I have got it managed to make the cylinder connector.
In my opinion it must be done very accurate, because it is a "kind of heart" of this engine. If here is any kind of not parallel or not in line than it will be a problem for the entire engine.
So I have tried to do it with all my skills and very accurate. Starting from some bar stock of good aluminium.
First the long bore in the middle and than one face side.
After making an arbor it was turned around and checked for concentric run-out.
One picture showing the result of to optimistic machining behaviour during arbor making.
The final machining of the outer shape done in a final step.
Step two will following shortly......


Title: Re: another Snow engine
Post by: fumopuc on August 15, 2015, 05:20:58 PM
...step two of the cylinder connector.
A quick and dirty fixture was made to keep all in position at CNC mill.
First side drilled, turned around and other side drilled.
A first sample assembling was successful so far, easy no piston and piston rods in.
Next to do, was to machine the windows for the later piston rod connection assembly.
Finally the latest assembly of the cylinder unit and time to open a bottle of good and cold Bavarian beer.
 
Title: Re: another Snow engine
Post by: Kim on August 15, 2015, 06:27:21 PM
Very nice work Achim!
Sorry about the saw blade there... I'll bet that was startling  :o

Kim
Title: Re: another Snow engine
Post by: fumopuc on August 15, 2015, 06:53:43 PM
I'll bet that was startling  :o

Kim
Hi Kim, I would say the problem was clearly  located betwen the handle of the mill and the floor of the Workshop. Or with other words, it is no good idea to try to cut with a 0,5 mm saw blade with the same parameters like a 1 mm blade. But now I hope I got it.
Title: Re: another Snow engine
Post by: Roger B on August 15, 2015, 07:05:25 PM
Coming along nicely  :praise2:  :praise2: I have a slitting saw that looks like your one  ::)  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on August 15, 2015, 07:12:45 PM
Coming along nicely  :praise2:  :praise2: I have a slitting saw that looks like your one  ::)  :ThumbsUp:  :ThumbsUp:
Thanks Roger, I have two already now. Time to make a parting off tool for small circlips of these broken saw blades.
Title: Re: another Snow engine
Post by: b.lindsey on August 16, 2015, 12:03:03 AM
Nice progress Achim. I am still following along even if quietly.

Bill
Title: Re: another Snow engine
Post by: Don1966 on August 16, 2015, 02:47:49 AM
Nice to see you moving along Achim and some beautiful work to boot......... :ThumbsUp:


 :popcorn:

Don
Title: Re: another Snow engine
Post by: fumopuc on August 16, 2015, 03:44:24 PM
Bill, Don thanks for watching.
Last night finally, there was more than one empty bottle of beer in the kitchen, so I have made an easy part today, the front guard.
I have put my last piece of 60 mm Alumium bar stock in the chuck and the outer shape was done without any issues.
All the rest was done easily because of not so important accuracy and nearly all processes were well known from the last parts I have made.
To get the final shape I have used my 63mm cutter head.
Title: Re: another Snow engine
Post by: Roger B on August 16, 2015, 03:57:51 PM
Nicely sculpted  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Admiral_dk on August 16, 2015, 08:20:58 PM
Looking really good  :praise2:
Title: Re: another Snow engine
Post by: sco on August 16, 2015, 08:46:09 PM
Achim,

Nice job on the front guard - did you use CNC to form the profile?

Simon.
Title: Re: another Snow engine
Post by: fumopuc on August 17, 2015, 06:40:05 PM
Roger, Per thanks for the friendly comnents.

Achim,

Nice job on the front guard - did you use CNC to form the profile?

Simon.

Simon, the holes have been made by CNC, the outer shape was made by the 63 mm milling head cutter without CNC. It is visible at  picture 06 at the top.
I have started 18 mm out of position in Y and moved in small steps by one millimeter.
The milling operation was done in Z only.
Thanks for the friendly words.
Title: Re: another Snow engine
Post by: sco on August 17, 2015, 07:37:31 PM
Got it - didn't realise that was the cutter at the top of the picture :-)

Simon.
Title: Re: another Snow engine
Post by: Dave Otto on August 17, 2015, 11:22:10 PM
Nice update Achim!

Your parts look great as always.

Dave
Title: Re: another Snow engine
Post by: fumopuc on August 23, 2015, 01:40:32 PM
Dave, thanks for looking and given friendly comments.


Today was my Bummer day. I have started to make the cross head for the Snow engine.
Everything went very well, it is my last piece of this 60 mm aluminium bar stock.
The face to the cylinder and the centre bore was made in one set up so it should be fine.
Next to do the outer and inner taper.
Due to some self made CAD machining drawings it was easy to get all necessary informations for the machining.
When I have made picture  "cross head 05" at the lathe,  I was getting nervous, because it didn't look inside like it should do.
There was nearly no cylindrical flange for the bronze bush any more.
After parting of I have got the confirmation, the expected flange was only  3 to 4 mm and not 18,5 as required.
Taking the swarf of the drawing and also a closer look given the reason for my mishap.
During machining, I have check the big dimension of the taper with a calliper and went step by step to 40,1 mm.
Unfortunately  33,8 mm was the point to stop.
I simply took the wrong dimension when doing this job at the lathe.
And as always in real life, as mentioned already earlier,it was the very last piece of 60 mm round aluminium bar stock in my shop.
So an order was placed and instead of making a new part I have overfilled my swarf box and the floor of the shop is visible all over in its original colour. 
Title: Re: another Snow engine
Post by: sco on August 23, 2015, 01:43:45 PM
Happens to the best of us Achim!

Cross fingers that the next one goes to drawing ;-)

Simon.
Title: Re: another Snow engine
Post by: fumopuc on August 23, 2015, 02:51:35 PM
Simon, I will have a serious word with the guy at the lathe.
Title: Re: another Snow engine
Post by: Dave Otto on August 23, 2015, 03:43:14 PM
Sorry about the part Achim;

We all have our days.


Dave
Title: Re: another Snow engine
Post by: b.lindsey on August 23, 2015, 03:56:21 PM
It only hurts for a little while Achim. Once that new aluminum arrives you will be all ready to tackle it again and get it spot on this time.

Bill
Title: Re: another Snow engine
Post by: Don1966 on August 23, 2015, 04:19:41 PM
I know the feeling well Achim. Should be better next time around.

Don
Title: Re: another Snow engine
Post by: Kim on August 23, 2015, 04:45:41 PM
That hurts - to put in all that time and effort... and all that good work!  No machining mistakes, just a reading glitch. And to top it off, no more raw material to make another one!

I agree, that's a hard day.

But I know you'll get it done, and with your usual excellent workmanship.

Kim

PS  Don't be too hard on the guy at the lathe.  Look at all the excellent work he's turned out for you! Make sure to cut him a little slack.  I'm sure he's worth twice what you pay him!  ;)
Title: Re: another Snow engine
Post by: Roger B on August 23, 2015, 05:58:22 PM
Bad time, but no real damage just frustration  ::)

As I was discussing with Stan Shire mistakes are almost always big, its not 0.01 mm too small its 10mm (or 1") too short.
Title: Re: another Snow engine
Post by: gbritnell on August 23, 2015, 06:00:52 PM
Hi Achim,
When I made the drawings for my current project, the flathead V-8 engine, I had the block drawn so when doing the oil pan I took the bottom view of the engine and used that as the starting template for the oil pan. I finished drawing the oil pan and everything looked fine. I had to buy a large rectangular piece of aluminum for the pan, around $24.00 plus shipping as I recall. I started the machining by progressively drilling larger hole to remove the heavy stock. I then started cutting away with ball nosed mills to hollow out the cavity. At this point I had about 8 hours of machining. It wasn't until I started cutting the cavity for the oil pump that things just didn't look right. I double checked the drawing and said "it matches the drawing" so I kept machining. I was now up to about 12 hours. The more I looked at it the more something just didn't seem right so I stopped. I went back to my Autocad drawing of the oil pan just to check. It still seemed ok. I then opened the drawing for the bottom of the block and as soon as I did I realize the mistake. I used the pan rail of the block as the template but never inverted it to it's true position. (symmetrical opposite) Now I had an expensive piece of aluminum that I couldn't use for anything else, a whole floor full of chips and curls, and a lot of wasted hours. Back in my formative years I would have taken a hammer to something to vent my frustration but over the years I learned that it never accomplished anything so I threw the now worthless chunk of aluminum in the scrap box, ordered another one and started over.
I feel your pain but it's part of machining.  I defy anyone to say that they've never made a mistake machining! Some are small and then others are large, and sometimes expensive.
gbritnell
Title: Re: another Snow engine
Post by: fumopuc on August 30, 2015, 12:06:16 PM
Simon, Dave, Bill, Don, Kim, Roger and George first of all, thanks for your always encouraging comments. I have had been sure, that I am not alone with some mishaps, but now I got the confirmation about that. Anyway my story is a small thing, if I read what George has done with his twice made oil pan. George, thanks for telling the whole story.


In the meantime the yellow truck of DHL was her last week and the cross head is nearly finished.
First picture showing right side  the bad one and left side  the new good one up to the same state.
Now the 18,5 mm long cylindrical bore for the later made bronze bush could be clearly recognized.


Next to do is the disassembly of everything and a final machining at all cylinder heads must be made, there is some overstock in the width.
This must be shorten in accordance with my European metric lip seals I will use and the later pressed in bronze bush.




PS: Kim, there was a pure friendly and positive discussion with the guy at the lathe.
Title: Re: another Snow engine
Post by: Dave Otto on August 30, 2015, 04:20:44 PM
Great progress Achim!

The second cross head turned out very nice; its all starting to come together and looking great.

Dave
Title: Re: another Snow engine
Post by: fumopuc on September 06, 2015, 04:48:17 PM
Hi Dave, thanks for checking in.


The aluminium cylinder parts are still at the anodising company, so it was time to make the pistons and piston rods.
My purchased piston rings are 27 mm, so all  is very close to the original design of Doug Kelley.
I have made the pistons 0,05 mm smaller than the dimension of the liner.
The piston rods in the chuck always protected by some can aluminium sheet.
A sample assembly was fine, so I have made finally the rod coupling and the movement can be seen in the 20 sec video.
Waiting for my cylinder parts now.
3REVuJN7zJI
Title: Re: another Snow engine
Post by: Don1966 on September 06, 2015, 04:54:36 PM
Awesome Achim. Your getting closer and I.......Like...................  :Love:


 :drinking-41:

Don
Title: Re: another Snow engine
Post by: Kim on September 06, 2015, 05:30:37 PM
It looks beautiful, as always Achim! Excellent work.

The movement seems really tight.  Is it supposed to be that tight?  I know nothing about this, I'm just trying to follow along and understand.  Just seems like a lot of friction there.  But maybe that's what you have to have for it to work properly?

Kim
Title: Re: another Snow engine
Post by: fumopuc on September 06, 2015, 07:04:40 PM
...
The movement seems really tight.  Is it supposed to be that tight?  I know nothing about this, I'm just trying to follow along and understand.  Just seems like a lot of friction there.  But maybe that's what you have to have for it to work properly?

Kim
Thanks  Kim. At the moment I am quite happy with the friction. There are 4 brand new piston rings running in these two liners and a bit friction must be there. I still have the little electric motor, connected with the crankshaft by a belt and pulley. After a further assembly some " running in program" is scheduled.
Title: Re: another Snow engine
Post by: Kim on September 06, 2015, 11:07:09 PM
OK thanks. I've never done an IC before, and definitely never used CI rings.
Thanks for the explanation,
Kim
Title: Re: another Snow engine
Post by: b.lindsey on September 07, 2015, 03:39:30 AM
More nice progress Achim. Where will you be getting your seals from?

Bill
Title: Re: another Snow engine
Post by: fumopuc on September 07, 2015, 05:22:31 AM
Hi Bill, thanks for watching.
My piston rods are made from 8 mm grinded (ground ?) silver steel. It was a bit difficult to find the right lip seal from FKM (FPM) for it, NBR was easy, but not a good choise. Finally it was found in the Seat/Volkswagen spare parts cataloge. A lip seal from FKM (Viton) 8x14x4mm made by company Elring in Germany. This dimenson is very close to the design of Doug.
Title: Re: another Snow engine
Post by: Ian S C on September 07, 2015, 02:11:45 PM
Ground Silver Steel.
Ian S C
Title: Re: another Snow engine
Post by: fumopuc on September 07, 2015, 04:15:59 PM
Ground Silver Steel.
Ian S C

Thanks Ian, I am struggling sometimes.
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 07:13:29 AM
Some good and some bad news.
On Friday morning I have picked up my black anodised cylinder parts.
Next to do was to make the bronze bushes for the piston rods and to get them into the cylinder heads.
My plan is to heat the aluminium part in the toaster oven to nearly 200°C and to knock the bush in, using a simple arbor and a hammer.
The extension of the hole in the cylinder should be nearly 0,057 mm in diameter at 200°C in theory.
So my first bronze bush was made 0,05 mm bigger in diameter than the hole in my uncoated sample/set up part.
The cylinder head was heated in the oven to 220°C, I have put it on the bench, I took the bush with the arbor, some oil on the bush, some knocking with the hammer and "et viola" job was done.
A sample assembly at the engine with the piston rod was fine.
So I have I started the next one, the first one with black coating at it, my first real cylinder head.
During hammering the second bush into the real black part there was some locking already and I had to increase the force with the hammer already.
A sample assembly with the piston rod at the cylinder has shown the first mess.
The bush is not 100% straight in its bore and during the tightening of the bolts the piston rod will be clamped.
It is only, may be 1° out, but it is enough in this configuration between working and looking.
It took me some time to recognize, but at the end this is the failure.
Because I have been a lazy boy, I have tried to give it another push, cold with a bigger hammer and a more solid underground, an this was the next failure.
Now, the part is slightly bend and I would say this part is nearly dead.
The right option should be to put it on the lathe, remove the oblique set bush, polish or increase the bore, make a new bush and try it again.
This is what I will try first now, to learn and train the rescue of such a part.
May be there is a chance to do an entire rescue, I will report later.
Also a simple fixture will be made to get a better alignment for the first set of the bush over the cylinder head and I will increase the chamfers at the bush and the cylinder head.
A reduction of overlap to 0,03 mm is also in my mind and the bushes will get a 5 or 6 hours stay the deep freezer.
Title: Re: another Snow engine
Post by: Kim on September 13, 2015, 07:18:58 AM
Achim,
So sorry to hear about your troubles getting the bush set properly.  :(  That's got to hurt.  I'll be pulling for you and hope you can salvage the part!  They all look so beautiful!

Kim
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 07:27:08 AM
Achim,
So sorry to hear about your troubles getting the bush set properly.  :(  That's got to hurt.  I'll be pulling for you and hope you can salvage the part!  They all look so beautiful!

Kim
Hi Kim, thanks for your encouraging words.
If my rescue will fail, than I still have the uncoated sample/set up part to replace it.
I am wondering only, why I have not given all parts for black anodising.
But this is the only one I can replace immediately, so I have to  try to improve my shrinkage process anyway.
 
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 08:44:21 AM

Hi everybody.
The result of my destroying Quality Department shows now clearly the reason for my failure.
The initial set of the bush was not in line with the bore, so the bush was pressed in canted.
Good reason to make a fixture what will give a better alignment at the beginning of the process.
Here a some second video, which will show the result of stupid leaded violence against a poor model engine maker Aluminium part.
KM0lc_pBJKYAnd below a picture which is showing what will happen if Achim is to lazy to make a proper fixture.

Title: Re: another Snow engine
Post by: Jo on September 13, 2015, 08:49:36 AM
Morning Achim,

When things like that happen it is so frustrating  :wallbang:.

A question: why did you not use a press to press it in, or maybe use the tailstock on the lathe to press it in?

Jo
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 10:45:00 AM
Morning Jo, thanks for checking in and the consolation.
I should have no real reason to be frustrated, because it is all my own fault.
I should know that a proper guidance  is necessary.
It is 30 years ago, when I have done a couple of Volkswagen cylinder heads monthly with new valve  guides, O.K. but sometimes human beings are forgettable.
I do not own a press and do not trust my Chinese tail stock, so shrinkage on a wooden base was the solution for me and not to lose to much heat shortly before getting the bush in.
Nevertheless I started my rescue program already and half way is gone.
First the bore was cleaned by 0,25 mm.
Next I have made a one off mandrel, suitable for the new bore diameter.
The cylinder head was "cleaned up" on both sides of the relevant faces.
Both sides have lost 0,2 mm, so the width is reduced by 0,4 mm but the rest is fine. Due to losing some width in the overall stack, I can use this cylinder head at the front side of the engine (opposite the crank shaft side ) so it will not have any real influence to the general arrangement.
That`s the plan, and now I will start to make a kind of guidance for my manual arbor and a new bronze bush.
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 02:22:51 PM
Rescue of the cylinder head was successful at the end.
I have made a new bronze bush with 0,03 mm overlapping to the bore.
Some research and development work has shown me, that I get a nearly 230°C hot part coming out of the toaster oven.
If I put it on some wooden base and measure it immediately, the bore is 0,05 mm bigger as at room temperature.
After 15 seconds it is down to nearly 200 °C and an oversize in bore of 0,03 mm only.
So this was the new value for making the diameter of the bronze bush, 0,03 mm bigger than the cold bore of the cylinder head.
The pictures showing also my simple guidance for the arbor, to set it right at the very first beginning.
In my garage I have found a very hard piece of wood, which is normally used in the garden for any kind of terrace building.
The bush was set with two easy made hammer blows and no outline of the part pressed into the wood.
So I would say this will be the way to go for the next three remaining parts.
Title: Re: another Snow engine
Post by: fumopuc on September 13, 2015, 02:28:15 PM
An assembly of the rescued part at the cylinder was made, opposite side with my uncoated sample/set up parts.
After a few movements for adjusting, followed by a soft tightening of all screws given me a comfortable feeling that I am basically on the right way again.
0_OSMVONUVE
Title: Re: another Snow engine
Post by: tvoght on September 13, 2015, 02:36:53 PM
Achim,
You must be feeling very pleased with the rescue. Good work.

--Tim
Title: Re: another Snow engine
Post by: Kim on September 13, 2015, 04:08:48 PM
Congratulations on the success of your rescue mission!  Another one saved  :ThumbsUp: :)
Kim
Title: Re: another Snow engine
Post by: Don1966 on September 13, 2015, 07:30:31 PM
Awesome Achim and a great recovery.

Don
Title: Re: another Snow engine
Post by: Roger B on September 15, 2015, 06:02:59 PM
Another problem overcome  :ThumbsUp:  :ThumbsUp: Looking good so far  :praise2:
Title: Re: another Snow engine
Post by: fumopuc on September 21, 2015, 07:51:16 PM
Tim, Kim, Don and Roger thanks for checking in.
To be honest, I have been very happy to find the right way.
Last weekend another two cylinder heads have been fitted with the bronze bushes.
The sample assembly was sucessfull too, it is possible to move the pistons with rings.
So one remainig cylinder head has to be made next and the set up part is still alive too.
Nothing really new to show in pictures so far.
Title: Re: another Snow engine
Post by: b.lindsey on September 22, 2015, 12:58:09 AM
Nice save Achim. Frustrating for sure, but you won out in the end...nice going.

Bill
Title: Re: another Snow engine
Post by: fumopuc on October 10, 2015, 09:19:41 AM
Hi Bill, thanks for watching.


Time is very rare at the moment, the job is eating all my spare time too.
Here are  some pictures from last week ends progress.
The rod slide was made. To avoid to much deformation, my decision was to give it some overstock material,milling a slot in small steps and than machining to
the right length. My experience is, if you machine a clevis than the slot will open itself like a flower and in this case it is not what I need.
Before the cutting to the right length was made , the wrist pin hole was drilled and reamed and a pin was set into the hole.
This was done only to check if still some deformation will form the clevis during the final machining.
But the pin could be removed after machining with the same force as fitted before.
For me this tiny 1,6 mm thread, deep in on side of the clevis, was a small adventure.
I have hold my breathe during the whole process, having all the time the ugly noise of a breaking tapper in my mind.
But up to here everything was fine.
Finally the bronze bush was made in accordance to the rod and fitted by a slight press fit with some Loctite 648.
Perhaps there will be some spare time tomorrow to do a sample assembly.



Title: Re: another Snow engine
Post by: Don1966 on October 10, 2015, 02:27:34 PM
Progress is progress Achim and I can relate to the pucker factor when taping........ :ThumbsUp:

Don :popcorn:
Title: Re: another Snow engine
Post by: Dave Otto on October 10, 2015, 03:39:48 PM
Good to see progress Achim.
As usual very nice work!

Dave
Title: Re: another Snow engine
Post by: fumopuc on October 18, 2015, 06:12:36 PM
Don, Dave thanks for checking in and giving friendly comments.


Today I have started the conrod and the fixture for soldering.
CI is not my favourite stuff to machine, but the design of this conrod with its self lubricating big and small eyes are an interesting design.
So here are the pictures, starting with a lump of CI, squaring it and giving some nice surfaces.



Title: Re: another Snow engine
Post by: vcutajar on October 18, 2015, 08:20:26 PM
Hi Achim.  Although I have not commented a lot, I still followed all your postings and learned new things. Like today, I did not know that one can find cast iron in square sections. I thought it was only found in round section.

Vince
Title: Re: another Snow engine
Post by: fumopuc on October 18, 2015, 08:56:56 PM
Hi Achim.  Although I have not commented a lot, I still followed all your postings and learned new things. Like today, I did not know that one can find cast iron in square sections. I thought it was only found in round section.

Vince
Hi Vince, I have got it from a supplier in my home town.
http://www.wilmsmetall.de/?page=bin/productview&data=NjhkITY5Mw==
The first time I have bought some CI.
Title: Re: another Snow engine
Post by: rudydubya on October 18, 2015, 09:57:50 PM
Following along quietly with the many others Achim.

Regards,
Rudy
Title: Re: another Snow engine
Post by: Nicolas on October 19, 2015, 09:22:59 AM
Hello Achim, just had a very quick skim through your build. I will definitely take the time to properly read through during the holidays.

I noticed that you are using an Optimum mill (I think). Is it the BF16 or the BF20? and are you happy with it? it is one of few available machines in New Zealand and I've heard mixed opinions about them quality wise .

Apologies for going off topic.
Title: Re: another Snow engine
Post by: Bluechip on October 19, 2015, 09:36:20 AM
Hi Achim.  Although I have not commented a lot, I still followed all your postings and learned new things. Like today, I did not know that one can find cast iron in square sections. I thought it was only found in round section.

Vince

It can be obtained from M-Metals.

http://www.m-machine-metals.co.uk/metals_menu.html

Snip from P10 of their catalogue.

Don't know if it helps for Malta though ....  :headscratch:

Dave

Title: Re: another Snow engine
Post by: fumopuc on October 19, 2015, 08:39:37 PM
Hello Achim, just had a very quick skim through your build. I will definitely take the time to properly read through during the holidays.

I noticed that you are using an Optimum mill (I think). Is it the BF16 or the BF20? and are you happy with it? it is one of few available machines in New Zealand and I've heard mixed opinions about them quality wise .

Apologies for going off topic.
Hi Nicolas, I have this Optimum BF 20 L (with the long table) since 3 years now and l am happy with it.
It is a Chinese production like all the other brands too, same casting, same peel off paint, same smell.....but labeled by a German company.
I could make everything what I want so far and the results are fine for me.
It is a low cost hobby machine and you will get what you have paid for.
My first mill was a German version of a Sieg X2, I have not  been happy with the small table, so I have sold it and bought the Optimum BF20L. I am a lazy boy and now the vice and rotary table are always mounted and I do not have long set up times. A lot of people and members of this forum still using mills like the X2 and they are building beautiful model engines which I admire. A the end the guy (or gal) turning the handwheels, is responsable for the result, not the mill.
With a super, special, high end mill it will be easier to get top results, but also there somebody has to turn the wheels and should know what he is doing.
Title: Re: another Snow engine
Post by: Roger B on October 20, 2015, 01:11:10 PM
Still following along  :ThumbsUp:  :ThumbsUp:  :wine1:

The connecting rod design is interesting using cast iron ends as the bearing material  :headscratch: I suppose as it is a low speed engine the weight is not so important.
Title: Re: another Snow engine
Post by: b.lindsey on October 20, 2015, 06:11:49 PM
Nice to see an update on this project Achim. The conrod is looking good!!

Bill
Title: Re: another Snow engine
Post by: joe d on October 20, 2015, 08:11:57 PM
Hi Achim

Still following along, nice good to see some progress!

Cheers, Joe
Title: Re: another Snow engine
Post by: fumopuc on October 25, 2015, 04:04:46 PM
Joe, Bill, Roger, Nicolas, Dave, Rudy and Vince thankīs for checking in. I appreciate it very much.
Today I have done the conrod soldering. A lot of heat was necessary to get the parts and the fixture to the right temperature.
But at the end I have got it and the final machining between two centres could be done also.
I have made a sample assembly with the first cylinder, only to check if the basics dimensions are O.K.
Title: Re: another Snow engine
Post by: fumopuc on October 25, 2015, 04:06:21 PM
... and if everything is sample assembled, some motion is showing where we are now.
QnLG31rfF_g
Title: Re: another Snow engine
Post by: Don1966 on October 25, 2015, 04:49:55 PM
Excellent work on the Conrod Achim and some great progress.


Don
Title: Re: another Snow engine
Post by: ICEpeter on October 25, 2015, 05:47:20 PM
Achim,
Great job, very impressive! Look forward to see more.

Peter J.
Title: Re: another Snow engine
Post by: b.lindsey on October 25, 2015, 06:44:07 PM
Nice  work Achim, and a very smooth action to it as well.

Bill
Title: Re: another Snow engine
Post by: vcutajar on October 25, 2015, 08:18:36 PM
Nice.  Are there a lot of parts more to do?  Can't wait to see it finished.

Vince
Title: Re: another Snow engine
Post by: Dave Otto on October 26, 2015, 12:04:26 AM
Hi Achim

That is a nice a smooth motion; the rod turned out great! Did you use a special flux to silver solder the cast iron?

Dave
Title: Re: another Snow engine
Post by: Kim on October 26, 2015, 03:06:25 AM
Nice work on fabricating the conrod.  And your soldering looks great!  I'm gaining a much better appreciation for your and everyone's soldering abilities!
Kim
Title: Re: another Snow engine
Post by: fumopuc on October 26, 2015, 05:45:32 AM
Nice.  Are there a lot of parts more to do?  Can't wait to see it finished.

Vince

Hi Vince, there is still a lot do. First I like  to get the cylinder units, related to cylinder, pistons, pistonrods, final assembled with all sealings.
Next I have to shorten the cylinder stands a bit, they are 0,5 mm higher than needed.
I have made them with some overstock material to do a later adjustment in case the two cylinders are not matching at the same hight of pistonrod centre.
So this later is very close and they both are matching at the moment, hopefully they will do after also.
If this is done, bearing brackets for the camshaft are the next parts to machine.
Followed by camshaft,cams, and 4 of these valve units with valves, springs, brackets and rocker arms.
If all this is done, we still  need an inlet and exaust manifold, so it will be interessting for the next dark month here in Munich.
Title: Re: another Snow engine
Post by: fumopuc on October 26, 2015, 05:57:30 AM
Hi Achim

That is a nice a smooth motion; the rod turned out great! Did you use a special flux to silver solder the cast iron?

Dave
Hi Dave, I am using one flux only, for everything.
http://www.goldschmiedebedarf.de/product_info.php?cPath=595_53_563&products_id=7535&language=en
It starts to operate at 550°C what is matching to the different solder I am using.
Title: Re: another Snow engine
Post by: Roger B on October 26, 2015, 07:44:12 AM
Another step forward  :)  Looking good  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on November 22, 2015, 06:52:11 PM
Hi Roger, thanks for watching.

Today I have made some studs, 16 pieces for one cylinder only.
Assemble, disassemble, looking for and finding some issues which are not proper aligned.
Again assembling, test , disassemling.
At the end, cylinder one seems to be o.k.so far with studs and the cylinder connector added.
Every time an additional part will be added to the unit,  the source for possible friction is growing also.
But that is the challenge I have been aware of.
Some pictures will follow soon.
Title: Re: another Snow engine
Post by: fumopuc on November 25, 2015, 04:34:48 AM
Hi everybody, here are the pictures I have promised last Sunday. The drawings of Doug are showing 4-40 Hex Socket Head Cap Screws for the fixation of the cylinder heads and combustion chambers, this was changed to some 3 mm studs, made from SS and nice small 3 mm Nuts. In my opinion it looks much better and matches better with the style of the old technologies. If the function will be equal, it will be seen later.
 
Title: Re: another Snow engine
Post by: joe d on November 25, 2015, 05:17:50 AM
Hi Achim

I like the looks of that, better than cap screws. :ThumbsUp:

Joe
Title: Re: another Snow engine
Post by: vcutajar on November 25, 2015, 06:30:25 AM
Yes, much better with the studs and nuts.

Vince
Title: Re: another Snow engine
Post by: Ian S C on November 25, 2015, 11:20:09 AM
Too many engines spoiled by Allen head cap screws, saw a photo the other day of a beam engine covered in them. :rant:
Ian S C
Title: Re: another Snow engine
Post by: Don1966 on November 26, 2015, 02:33:45 AM
Nicely done Achim and more added to it's looks............ :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: fumopuc on November 29, 2015, 03:16:21 PM
Joe, Vince, Ian and Don, thanks for watching.


Today I have made quick and dirty a mount for my Dremel at the lathe.
Reason was the machining of a hardened pin of the shelf, which I have modified as a wrist pin for the Snow engine.
Also the final hole for the spring pin was drilled and reamed after adjusting everything into the right position.
At the end it looks easy, but all this assembly work is very time consuming.
The wrist pin will be fixed with a 1,6 mm set screw in the cross head, the allen key is 0,7 mm.
Title: Re: another Snow engine
Post by: fumopuc on November 29, 2015, 03:22:32 PM
Second job from this rainy and stormy Sunday was the complete assembly of cylinder one with studs and the cross head unit.
Everything is still moving with nuts tighten, so I am more than happy for the moment.
The e-motor is still running to free everything a bit.
AGHq7NgGDVM
Title: Re: another Snow engine
Post by: Kim on November 29, 2015, 03:34:18 PM
You have achieved very smooth motion there Achim.  It looks very nice!
Kim
Title: Re: another Snow engine
Post by: Roger B on November 29, 2015, 04:00:31 PM
Very smooth  :ThumbsUp:  :ThumbsUp: Another step nearer to the first pops and bangs  :)
Title: Re: another Snow engine
Post by: Don1966 on November 29, 2015, 04:52:44 PM
Smooth as a baby's bottom Achim and looking great..........  :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: vcutajar on November 29, 2015, 05:15:10 PM
That looks really great Achim.

When you mentioned the weather there, you reminded me of Munich.  I guess I will miss the Christmas markets and as my wife told me this week, no Stollen this year for Christmas.

Vince
Title: Re: another Snow engine
Post by: fumopuc on November 29, 2015, 05:50:14 PM
Very smooth  :ThumbsUp:  :ThumbsUp: Another step nearer to the first pops and bangs  :)
Hi Roger, there are a lot of steps necessary for the hopefully first pops and bangs.
First to do, is to connect cylinder number two, another challange.
Title: Re: another Snow engine
Post by: fumopuc on November 29, 2015, 05:59:56 PM
Kim, Vince, Don thanks for giving friendly comments. Motion is one thing, compression and all the other IC engine related issues an other. We will see what is comming next.
Title: Re: another Snow engine
Post by: Dave Otto on November 29, 2015, 10:21:24 PM
Nice progress Achim!

Dave
Title: Re: another Snow engine
Post by: b.lindsey on November 30, 2015, 12:19:48 AM
Looking good Achim, one step at a time and you will get there. The motion looks really nice thus far!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on December 13, 2015, 06:49:43 PM
Bill, Dave thanks for watching and the friendly comments. Shop time is again very rare at the moment. I have got it managed to make some more studs from SS and fitted the second cylinder to the running in program. It is running with nearly 60 rpm and after 15 minutes my poor little Chinese e-motor started some sweating. I have to interrupt the run than for 15 minutes for the next stint. The video are showing only some seconds, the time to archive the the result have been hours of adjustment.
OvojsiVZh04
Title: Re: another Snow engine
Post by: Roger B on December 13, 2015, 07:02:43 PM
Coming along nicely  :ThumbsUp:  :ThumbsUp: That motor should be ok up to 70°C.
Title: Re: another Snow engine
Post by: fumopuc on December 13, 2015, 07:43:08 PM
Coming along nicely  :ThumbsUp:  :ThumbsUp: That motor should be ok up to 70°C.
Hi Roger, may be you are right, but the power loss at 50° C stopped my motion already.
If I see the Brian Rupnow set up, may be a reason to think generally about my installation.
Title: Re: another Snow engine
Post by: Roger B on December 13, 2015, 07:55:51 PM
Hi Achim,

The increasing resistance of the windings as the temperature increases will reduce the power if the supply voltage is constant. Can you find a couple more volts?
Title: Re: another Snow engine
Post by: fumopuc on December 13, 2015, 08:23:25 PM
Hi Achim,

The increasing resistance of the windings as the temperature increases will reduce the power if the supply voltage is constant. Can you find a couple more volts?
Hi Roger,  I am using an old small Sunbattery lead accumulator and an old 12 Volt car charger, so no real chance to increase the voltage.
Title: Re: another Snow engine
Post by: Dave Otto on December 14, 2015, 12:59:33 AM
Hi Achim

The family shot looks great; this is going to be one stunning engine when finished!
Good to see some more progress.

Dave
Title: Re: another Snow engine
Post by: Don1966 on December 14, 2015, 01:03:28 AM
Hi Achim

The family shot looks great; this is going to be one stunning engine when finished!
Good to see some more progress.

Dave
Like Dave said Achim stunning...........I........like......... :praise2:

Don
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2015, 02:20:34 PM
Hi Achim,

The increasing resistance of the windings as the temperature increases will reduce the power if the supply voltage is constant. Can you find a couple more volts?
Hi Roger, I took your advice and have made a new investment at Conrad Electronic this morning.
More voltage, longer running time up to the temp limit.
 
Title: Re: another Snow engine
Post by: zeeprogrammer on December 28, 2015, 06:30:30 PM
Fantastic. I'd completely missed this thread and enjoyed catching up.
Really glad you added the operator stand. Nice detail.

Someone should put a word into Das Deutsches Museum.
Title: Re: another Snow engine
Post by: fumopuc on December 28, 2015, 07:22:13 PM
Dave, Don thanks for the always friendly comments.
The build is a bit on hold currently, I have got my Deckel SO clone and had to bulid some new furniture.


Fantastic. I'd completely missed this thread and enjoyed catching up.
Really glad you added the operator stand. Nice detail.

Someone should put a word into Das Deutsches Museum.

Zee, thanks for watching and the friendly comments. I am followind along with your Monitor bulid also, the plans are in my files since a year or even more, but as Chuck mentioned 'So many projects, so little time............'
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2016, 09:34:36 AM
Hi Everybody and Happy New Year.
Yesterday I have been in the shop again.
First I have made the last studs for the cylinder/cylinder head connection, 32 (plus 2 spares)  pieces over all, these jobs are not my favourites.
After this, nothing special, a gimmick only.
The running in procedure is still ongoing. The day before yesterday I killed my little Chinese e-motor, due to to much voltage supplied by my new variable power supply, operated by a crazy guy. A quick last minute stop in an electronic shop has given a replacement. An the operator has a strictly 14 Volt limit now.
 
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2016, 09:35:09 AM
....here the gimmick in motion.
IRntubvgE1g
Title: Re: another Snow engine
Post by: ths on January 01, 2016, 10:56:38 AM
That's very beautiful, Achim. The smoothest runner I've seen. I turned the volume up, and it still didn't make a sound. Impressive. Cheers, Hugh.
Title: Re: another Snow engine
Post by: vcutajar on January 01, 2016, 11:08:30 AM
Oh, that is smooth. :whoohoo:

Happy new year.

Vince
Title: Re: another Snow engine
Post by: fumopuc on January 01, 2016, 11:16:24 AM
Hi Hugh, this motion is a fake only. It is running, driven by the e-motor with 50 RPM. If it will be fired, as an IC engine (hopefully), than there are 900 RPM expected.
Concerning the sound, this small e-motor, with the gears in it, creates such a horrible noise, that I have deleted the sound in the video complete.
So, donīt trust the shine.
Happy New Year




Title: Re: another Snow engine
Post by: Kim on January 01, 2016, 06:10:58 PM
It's looking great Achim!  :ThumbsUp:
And pretty soon, you'll have it running under its own power!  Then we'll need to hear the audio that goes with the video :)
Kim
Title: Re: another Snow engine
Post by: Don1966 on January 01, 2016, 06:13:52 PM
Looks like your just about ready to finalize this one Achim. Nice and smooth............ :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: Roger B on January 02, 2016, 06:50:59 PM
Looking good Achim  :ThumbsUp:  :ThumbsUp: You need a bigger motor  :) I have been using a 6V accumulator up to now, but Conrad had a free delivery offer so I bought a 12V 7AH one. It will run my horizontal engine up to at least 2000 rpm  ::)
Title: Re: another Snow engine
Post by: fumopuc on January 02, 2016, 08:29:47 PM
Hi Roger, in the meantime, with some patience, the motor is fine for 30 Minutes running time in one stint. The second cylinder is also more "free"now and I have reduced the voltage to 13,5 and the Amp limit to 1,5 max.
Today it was running already 45 minutes in one stint, motor temperature under 30° C. So we are on the right way now.
Title: Re: another Snow engine
Post by: joe d on January 02, 2016, 08:31:43 PM
Sounds like you are getting there.  Still enjoying following along!

Cheers, Joe
Title: Re: another Snow engine
Post by: ths on January 03, 2016, 11:27:47 AM
I'll accept your explanation, but it does move nicely. Hugh.
Title: Re: another Snow engine
Post by: fumopuc on January 03, 2016, 06:30:57 PM
Hi Hugh, I like this smooth motion also very much.


Today was cam shaft bracket day and test assembly of the cam shaft.
I am happy that it is finaly at its right place.
Everything seems to match. The brackets will go for anodising tomorrow, so next to do is a separable shaft connection.
Engine was driven the whole day today by the little e-motor, no further issues.

Title: Re: another Snow engine
Post by: Roger B on January 03, 2016, 06:52:20 PM
 :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Dave Otto on January 04, 2016, 01:05:24 AM
I second what Roger said.

Great progress Achim; are the rocker arms going to give the CNC a work out?

Dave
Title: Re: another Snow engine
Post by: fumopuc on January 04, 2016, 06:04:55 AM
Vince, Kim, Don, Joe, Hugh, Roger and Dave thanks for checking in and given friendly comments.

Yes Dave, my plan is to make the rocker arms, rocker arm brackets and cams with the help of CNC.
Also the drilling operation in the valve cage for the fixation at the combustion camber will be an CNC issue.
First will be the cams. Until today I have never made steel swarf with the little CNC mill, so a new adventure will comming soon.
Title: Re: another Snow engine
Post by: fumopuc on February 07, 2016, 12:06:55 PM
Hi Everybody, life has provided me a few special tasks lately, so I was a little distracted.
But now some little progress at the Snow build again.
I have made a shaft coupling for the cam shaft, so it could be possible later, to disassemble the the cylinder unit from the sub base by disconnecting the the con rod and the cam shaft. Some easy parts, but I have enjoyed my new 5C collet chuck.
And I got a new discounter baking oven thermometer, very low investment but useful.

Title: Re: another Snow engine
Post by: zeeprogrammer on February 07, 2016, 12:49:10 PM
Coming along great.
Love the detail and coloring!
Title: Re: another Snow engine
Post by: Roger B on February 07, 2016, 01:08:19 PM
That's a neat flange  :ThumbsUp:  :ThumbsUp: I expect you will find it very useful when you come to setting the engine up and getting it to run  ::)
Title: Re: another Snow engine
Post by: fumopuc on February 07, 2016, 02:26:16 PM
Coming along great.
Love the detail and coloring!


Hi Zee, thanks.



Title: Re: another Snow engine
Post by: fumopuc on February 07, 2016, 02:40:12 PM
That's a neat flange  :ThumbsUp: :ThumbsUp: I expect you will find it very useful when you come to setting the engine up and getting it to run  ::)
Hi Roger, thanks. Yes I hope all these details will help to get it running.
In the meantime the cams are made. I thought a good job for the little Proxxon CNC mill.
First a simple CAD drawing and than some playing with the CAM program.
Until now I have never used a 6 mm cutter in steel with my CNC, so I have been very carefully. It is moving in 1,1 mm steps into the steel disk when following the outline.(1300 rev/min and 60 mm/min feed rate)
First there is a 6 mm roughing cutter working, leaving 0,035 mm overstock, cutting against the feed.
Next a normal 4 flutes 6 mm cutter, in climb modus, is cleaning the surface in one go around.
To check everything I have started with a sample part from aluminium.
Currently everything is in the tumbler for polishing.
Title: Re: another Snow engine
Post by: Kim on February 07, 2016, 03:41:58 PM
Nice CnC work on the cam Achim!  And I like your powder coating too.  That shaft coupling looks very sharp!
Kim
Title: Re: another Snow engine
Post by: b.lindsey on February 07, 2016, 04:11:49 PM
I am just getting caught up on your thread Achim. You are still making some fine progress on this beautiful engine and the motion does seem very smooth as others have said.

Bill
Title: Re: another Snow engine
Post by: Don1966 on February 07, 2016, 04:25:32 PM
Achim it's good to see more progress on this beauty. The coupling and cam came out great and love the oven. I had bought on a while back to bake out transformers and small motors. It has a convection fan and the thing works great for baking out things and drying paint.

Don
Title: Re: another Snow engine
Post by: Dave Otto on February 07, 2016, 04:26:16 PM
Nice Update Achim,

The shaft coupling and cams turned out great!

Good to see progress.
Dave
Title: Re: another Snow engine
Post by: fumopuc on February 08, 2016, 12:30:21 PM
Kim, Bill, Don and Dave, thanks for checking in.
It is good to have you all still with me. I have some days off, so a good opportunity to finish the cams.
There are two M 2,5 mm grub screws in each cam to fix it at the shaft and to adjust the timing.
Again a good opportunity to use the square collet block with a little self made fixture, because the angle from bore to bore is 90°.
Also some tiny grooves were made to the shaft, exactly where the cams are placed at the shaft.
At the end again a sample assembly.
Title: Re: another Snow engine
Post by: fumopuc on February 08, 2016, 12:33:52 PM
... and the whole story in motion



fODYDxGSi0g
Title: Re: another Snow engine
Post by: vcutajar on February 08, 2016, 01:20:28 PM
Thanks for the update Achim.  Still following along.  Not long now for the first run.

Vince
Title: Re: another Snow engine
Post by: Kim on February 08, 2016, 02:12:48 PM
Thanks for the video Achim, your Snow is looking great!
Kim
Title: Re: another Snow engine
Post by: Roger B on February 10, 2016, 10:08:52 AM
Looking good  :ThumbsUp:  :ThumbsUp: Does the Snow engine use rollers to follow the cam? If it has flat followers the cam flanks could do with a radius.
Title: Re: another Snow engine
Post by: fumopuc on February 10, 2016, 10:43:08 AM
Looking good  :ThumbsUp: :ThumbsUp: Does the Snow engine use rollers to follow the cam? If it has flat followers the cam flanks could do with a radius.
Hi Roger, the model is there close to the original engine.
There are 12 mm rollers in the rocker arms, rolling on the cams.
The attached picture shows it at the big one.

Title: Re: another Snow engine
Post by: Roger B on February 10, 2016, 01:46:33 PM
I don't know if it is the light or the angle but that full size cam seems to have an odd notch in the profile  :headscratch: There's also a flange just like yours  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on February 11, 2016, 08:38:28 PM
Hi Roger, I would say it is my bad picture.
Have a look at 0:40
JKXqm49c1Qg
Title: Re: another Snow engine
Post by: fumopuc on February 14, 2016, 06:53:41 PM
Hi everybody, here a quick up date were we are today. Some impressions of ongoing manufacturing, but no finished parts at the moment.
The cam shaft brackets are outside for black anodising, so I have started with the valve cages already.
I would like to used some studs for the fixation of valve cages to the combustion chambers.
For the inlet side it seems to be useful, for the outlet side, under the cylinder unit, a nightmare.
I have to find there a more handy solution.
Also some gaskets are already made.
 
Title: Re: another Snow engine
Post by: vcutajar on February 14, 2016, 08:50:30 PM
I think the inner two studs will be a bit of a problem to attach a nut to them.

Can you glue a nut to one side of the stud and use it as a bolt.  I do not know if this makes sense to you.

Vince
Title: Re: another Snow engine
Post by: Dave Otto on February 15, 2016, 12:34:57 AM
Nice work as usual Achim.

I see that you are making good use of your cutting machine for the gaskets. I recently purchased a Silhouette Cameo machine and have been learning how to run it.  My first attempt at cutting gaskets was not completely successful. I was cutting a rubber reinforced fiber material about .017" thick; no matter what I did it just wouldn't cut clear through. I think the rubber in the material allows it to push away from the knife. I was able to get usable gaskets by finishing them with a sharp X-acto knife. Maybe I need to start looking for some different gasket material.

Can you remove the cylinder assembly from the base to install the exhaust valve cages?

Dave
Title: Re: another Snow engine
Post by: fumopuc on February 15, 2016, 06:55:03 AM
I think the inner two studs will be a bit of a problem to attach a nut to them.

Can you glue a nut to one side of the stud and use it as a bolt.  I do not know if this makes sense to you.

Vince
Hi Vince, the nuts at the inner studs are not a problem, but to fit the studs is not so easy. Also the length of the hole unit with the valve and spring will be a no go.
I will try to make some bolts with a similar shape of the small  3 mm nuts, may be the best solution.
Title: Re: another Snow engine
Post by: fumopuc on February 15, 2016, 07:17:40 AM
Nice work as usual Achim.

I see that you are making good use of your cutting machine for the gaskets. I recently purchased a Silhouette Cameo machine and have been learning how to run it.  My first attempt at cutting gaskets was not completely successful. I was cutting a rubber reinforced fiber material about .017" thick; no matter what I did it just wouldn't cut clear through. I think the rubber in the material allows it to push away from the knife. I was able to get usable gaskets by finishing them with a sharp X-acto knife. Maybe I need to start looking for some different gasket material.

Can you remove the cylinder assembly from the base to install the exhaust valve cages?

Dave


Hi Dave, thanks.

0,4318 mm (0,017") is thick in my experience. But never the less, it should be possible with the right adjustment.There are different blades available also a so called deep cut blade.
When I have cut some gaskets from 0,25mm (0,0098") material (http://www.ebay.de/itm/like/281318145007?ul_noapp=true&chn=ps&lpid=106) I have choosen a set up of their software for light carton and the knife has been  followed automatically the outline two times. May be you should play around with some lost material like light carton first to find the right set up. As seen in my gasket picture, the correct contour was cut into paper first to check the fit at the real part.
Title: Re: another Snow engine
Post by: Ian S C on February 15, 2016, 01:37:16 PM
Some times cutting rubber can be helped by putting it in the freezer for a while, with thin stuff like that, probably best to put the cutting board in the freezer too. Rubber would be best cut with a wad punch.
Ian S C
Title: Re: another Snow engine
Post by: fumopuc on February 15, 2016, 08:27:20 PM
Some times cutting rubber can be helped by putting it in the freezer for a while, with thin stuff like that, probably best to put the cutting board in the freezer too. Rubber would be best cut with a wad punch.
Ian S C
Hi Ian, good idea, have to try this.
Title: Re: another Snow engine
Post by: Dave Otto on February 15, 2016, 09:30:05 PM
Thanks for the tips Achim.
Ian, the freezer is also a great idea I will give that one a try.

Dave
Title: Re: another Snow engine
Post by: fumopuc on February 16, 2016, 08:14:31 AM
.... some more impressions from the valve cage story. They are all fitted nicely now and getting their individual identification to the fitted place.
Today I should get a hexagon 5c collet in 4mm, so I will try to make some special bolts for the lower ones.
Before the remaining surfaces for brackets and inlet ports will be machined,I have tried a proper valve seat machining at my sample part.
A lot of tools are used for this operation.
To check if it will be OK I do need a valve next.
After reading all the old MEB magazines, I will try the "step method" from Jerry Kieffer first now.
I will let you know what happens.



Title: Re: another Snow engine
Post by: fumopuc on February 16, 2016, 03:08:46 PM

Hi Everybody, some valve attempts has been made. First attempt was with wrong material, I have had a 10mm bar without  any marking and that was not the 1.4305 SS (X8CrNiS18-9 (DIN EN 10088-1)) I do use normally. Second attempt was a small fight with my carbide insert, was no the best any more. But third attempt went fine. The "step method" is generally working fine, sorry for the bad picture.
Additional to Jerry Kieffers method, I have added a grinding process with a Dremel in the tool post.
I have left stem 0,1 - 0,15 mm overstock at the stem and tried to do a grinding, which worked very well.
Finally some manual sanding with 400 grid, still in lathe.
A quick check of the wear pattern, shows that the valve disk should be a bit smaller.
Generally I think to be at the right way.
Title: Re: another Snow engine
Post by: ICEpeter on February 16, 2016, 06:59:34 PM
Achim,
I noticed you were using a, I presume, 90 degree countersink for making the valve seat. How did that work and what was the resulting valve seat surface quality? did the surface require or will require additional treatment i.e. grinding / lapping to be acceptable?

Peter J.
Title: Re: another Snow engine
Post by: Roger B on February 16, 2016, 08:03:06 PM
Looking good  :ThumbsUp:  :ThumbsUp: That's a lot of parts to make  ::)

How big are the valve stems? You could probably use a tailstock center to stop them deflecting when you are turning them (you could also use M5 screws as the raw material to reduce the amount of turning). The center drilling can be cut off when you making the fixing for the spring cap.
Title: Re: another Snow engine
Post by: fumopuc on February 16, 2016, 08:04:57 PM
Achim,
I noticed you were using a, I presume, 90 degree countersink for making the valve seat. How did that work and what was the resulting valve seat surface quality? did the surface require or will require additional treatment i.e. grinding / lapping to be acceptable?

Peter J.
Hi Peter, I have still the same questiones. Today I have been concentrated to the valve stem mostly and that seems to work.
Tomorrow I will make another valve with the additional target to check the leakage of valve cage and valve.
As seen in the above pictures with the blue paint, I am not so far away.
A small vaccuum pump for brake bleeding is ordered as test equipment, and some grinding paste is under the bench.
Until now I have used the 90° countersink for both, making the valve seat and valve chamfer and no additional treatment.
I will let you know what will be the final result.
Title: Re: another Snow engine
Post by: fumopuc on February 16, 2016, 08:17:03 PM
Looking good  :ThumbsUp:  :ThumbsUp: That's a lot of parts to make  ::)

How big are the valve stems? You could probably use a tailstock center to stop them deflecting when you are turning them (you could also use M5 screws as the raw material to reduce the amount of turning). The center drilling can be cut off when you making the fixing for the spring cap.
Hi Roger, thanks.
The stems are 3,1 mm and the valve disc is 9,3 mm. So im startng with 10 mm bar stock.
My target was to avoid this center drilling story and it seems to work.
Thanks to Jerry Kieffer.
Title: Re: another Snow engine
Post by: Don1966 on February 17, 2016, 02:34:51 AM
The valves and guide look good Achim. What did you use the Dremel stone for?

Don
Title: Re: another Snow engine
Post by: Kim on February 17, 2016, 06:30:52 AM
Looking good Achim.  You're out in an area that I've never played in before, but its looking really nice. You do very careful, methodical work.
Kim
Title: Re: another Snow engine
Post by: zeeprogrammer on February 17, 2016, 10:44:52 AM
Still watching Achim. A very fascinating model.
Title: Re: another Snow engine
Post by: fumopuc on February 18, 2016, 07:24:22 AM
Looking good Achim.  You're out in an area that I've never played in before, but its looking really nice. You do very careful, methodical work.
Kim


Hi Kim, thanks.
May be you are closer to that area as you can imagine at the moment.

Still watching Achim. A very fascinating model.

Carl, thanks for watching.

The valves and guide look good Achim. What did you use the Dremel stone for?Don

Don, thanks.
I have ground the last 0,1 mm before polishing off the stem with the stone, see pictures below.

I have written this post yesterday morning already, but than it disappeared in the suddenly interrupted internet connection.
After this I have not been in the mood to repeat it yesterday.

Generally I have been able to repeat and improve my first attempts with the valve machining in accordance with my drawings.
1. Starting from 10 mm bar stock with the Jerry Kieffer step method. This little 15 mm micrometer from Moore & Wright was a very useful tool for all measurements in this case. Very handy.
2. I have left 0,1 to 0,15 mm overstock material.
3. Using the Dremel with the stone and this last 0,1 mm were ground down.
4. Some polishing with 400 grig given a surface like a mirror.
5. Machining the 45° angle as a seat of the valve with the 90° countersink. In my last pictures in the earlier posting it cold be seen, that the contact between valve and valve seat (in the blue area) didnīt match properly. The contact was at an edge only and not at the possible surface. So I have corrected the clamping of the 90° countersink in the tool post very little.
Again, I have tried to make the wear pattern visible with some blue colour. In my opinion it looks much better than the first attempt, because now there is a surface going around on the valve and the valve seat with no paint.
The ordered vacuum pump for brake bleeding arrived yesterday, so at a later point it will let me know if it will leak or not.
I have started to make some more valves.
Title: Re: another Snow engine
Post by: fumopuc on February 19, 2016, 01:15:14 PM
We do have 11 valves now, with a, in my opinion, reasonable wear pattern.
The holes for the pins are made and I am just preparing the first real leakage test.
All valves stems are checked with my sample valve cage.
Title: Re: another Snow engine
Post by: Kim on February 19, 2016, 04:52:59 PM
Very nice looking valves! 
Eleven of them huh?  How many do you need, is it 8?  So you've done 3 for the shop gnomes?
Kim
Title: Re: another Snow engine
Post by: fumopuc on February 19, 2016, 07:20:49 PM
Very nice looking valves! 
Eleven of them huh?  How many do you need, is it 8?  So you've done 3 for the shop gnomes?
Kim

Hi Kim, yes the engine will need 8 valves. I have made 8 valve cages plus one sampe valve cage for any kind of experiments. So minimum 9 valves will be needed. After the final machinng of the valve cages with bore and valve seat I will match the valves to an individual valve cage by best fit. So the remaining ones may be will end as a keyring pendant.
I have told the shop gnomes that valves are not good for them, hopefully they understood.
Today I have done some leakage test already, the first result was not so bad, but improvement is necessary.
The report and pictures will follow soon.
Title: Re: another Snow engine
Post by: crueby on February 19, 2016, 10:19:50 PM
You have shop gnomes too? Still trying to find out where the put my compass and protractor. And the larger dead center too. Pesky buggers! Leaving cookies for them didn't help...

Great looking engine by the way!
Title: Re: another Snow engine
Post by: fumopuc on February 20, 2016, 11:04:39 AM
Hi Chris, thank for checking.


Valve seats next part.
Basically I think I try to be to accurate here, but I am afraid, that at the end at this 4 cylinder engine every single issue, what can be check in advance will decide about running or not.
So I have checked my sample valve cage first, if everything is sealed. First it was not, due to a not proper soft soldering of the flange, I did it in the oven with solder paste, but I think there was not enough paste involved.
Then I have tried a valve like it was coming from the late and did the vacuum test. It toke 5 sec until the vacuum was gone.
Here I do need some help/advice  from the more experienced IC engine builders if this may be is not so bad already ?
The wear pattern is good and if I would build a single cylinder engine, I would try to run it like that, because after some running it will be seated quickly, I could imagine.
But as already said before, in this case with the 8 valves in the engine I would like to go the safer way.
So I made a handle to clamp at the valve stem with a brass plunger and a 3 mm grub screw and did some grinding with a fine automotive valve grinding paste.
Lets say 5 Minutes job.
After this I have got the result, seen in the small video.
8VFQPxGbFuMIt keeps some vacuum for nearly 20 sec now.
Is that enough ?
In my feeling it is more than enough, but I would like to hear the opinion of you guys out there.
Title: Re: another Snow engine
Post by: vcutajar on February 20, 2016, 11:44:20 AM
I did the same thing to check the valves on the Kiwi.  If I am not mistaken, if you can keep some vacuum for 20 seconds than it should be OK.

Vince
Title: Re: another Snow engine
Post by: sco on February 20, 2016, 11:52:06 AM
Looks more than good enough to me Achim.  Still following quietly along,

Simon.
Title: Re: another Snow engine
Post by: Roger B on February 20, 2016, 12:04:20 PM
Good progress Achim  :praise2: A 20 second vacuum sounds ok to me  :ThumbsUp:
Title: Re: another Snow engine
Post by: Don1966 on February 20, 2016, 02:42:37 PM
Cool Achim, I Don't think the valve will stay close that long when running. Nice work......... :ThumbsUp:

 :popcorn:
Don
Title: Re: another Snow engine
Post by: Kim on February 20, 2016, 03:52:13 PM
Very cool, Achim!  I've heard people talk about checking their valves like this, but never really knew how it was done. That's fascinating! Thanks for sharing it.

Kim
Title: Re: another Snow engine
Post by: fumopuc on February 21, 2016, 06:59:29 AM
Vince, Simon, Roger, Don and Kim, thanks for your input.
I will start to machine the valve seats into the inlet valve cages today.

Title: Re: another Snow engine
Post by: fumopuc on February 28, 2016, 06:44:37 PM
Achim,
I noticed you were using a, I presume, 90 degree countersink for making the valve seat. How did that work and what was the resulting valve seat surface quality? did the surface require or will require additional treatment i.e. grinding / lapping to be acceptable?

Peter J.


Hi Peter, today I can answer your question after getting some experience with the inlet valves.
I have finished all inlet valve cages with soldered flanges and did the vacuum test. I have been supervised by myself, but all 4 inlet valves kept the vacuum for 20 seconds or more without any further treatment. So I am very happy with this result, hopefully I can repeat this with the outlet valves and valve cages.


Today I have done the threads at the inlet flanges for the inlet manifold also. M 1.6 mm, not my favourite job, because I always kept my breath during cutting and getting a read head. At the last picture we have a M 1.6 mm bolt and a M 3 mm stud very close together, the stud seams to be huge.
Title: Re: another Snow engine
Post by: Dave Otto on February 29, 2016, 01:08:18 AM
Very nice Achim, I always enjoy seeing progress on this project.

Dave
Title: Re: another Snow engine
Post by: zeeprogrammer on February 29, 2016, 01:14:43 AM
Love those last two pics. Spent some time on them.

Really really nice work. It's a show piece.
Title: Re: another Snow engine
Post by: fumopuc on February 29, 2016, 05:25:39 AM
Dave, Carl thanks for checking in and the friendly comments.
Title: Re: another Snow engine
Post by: Kim on February 29, 2016, 07:16:30 AM
Beautiful work, as always Achim!
Still following along and enjoying your build!   :popcorn:
Kim






Title: Re: another Snow engine
Post by: Roger B on February 29, 2016, 07:49:17 AM
Coming along well  :ThumbsUp:  :ThumbsUp: I also get a little nervous with anything less than M2  ::)
Title: Re: another Snow engine
Post by: gbritnell on February 29, 2016, 12:47:17 PM
Hi Achim,
Quite a masterpiece! The smallest fasteners I have used were 1.0x.25. When tapping I use a very small chuck to hold the taps. That way I can feel how much side pressure I'm putting on the tap.
gbritnell
Title: Re: another Snow engine
Post by: Captain Jerry on February 29, 2016, 01:12:44 PM
Hi Achim,
Quite a masterpiece! The smallest fasteners I have used were 1.0x.25. When tapping I use a very small chuck to hold the taps. That way I can feel how much side pressure I'm putting on the tap.
gbritnell

That is good to know.  I have often used a small hand held chuck for tapping small thread but I was ashamed to say so for fear of ridicule.  It just seems like an amateurish method.  Now I can hold my head high.

Jerry
Title: Re: another Snow engine
Post by: fumopuc on February 29, 2016, 07:24:13 PM
Kim, Roger, George, Jerry thanks for checking in and the friendly words, I appreciate it very much.


For any kind of thread cutting I am using this little stand, made from a normal drill stand.
Not real high tec but functional.

Title: Re: another Snow engine
Post by: Don1966 on February 29, 2016, 08:27:32 PM
Lovely work Achim enjoy following you........ :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: V 45 on March 01, 2016, 11:18:11 PM
Looking VERY nice indeed !! I like the transformed drill press !!
Title: Re: another Snow engine
Post by: fumopuc on March 06, 2016, 12:11:49 PM
Don, V45 thanks for checking in and the friendly words.


Some minor progress only today, the exhaust valve cages have got their drilling for the valve shafts and valve seats.
Some valves are matched and marked with numbers to each valve cage.
Next to do, making flanges for the exhaust manifold, some soldering and leakage test of the valves, followed by setting the holes for the rocker arm brackets.

Title: Re: another Snow engine
Post by: zeeprogrammer on March 23, 2016, 12:14:22 AM
I'm starting to question the title..."Another Snow Engine".

This one stands on its own.
Title: Re: another Snow engine
Post by: fumopuc on March 23, 2016, 06:08:26 AM
Hi Carl,
thanks for your "question" it honours me.
But we should stay realistic.
Until today, it is not finished.
There is a cross head bearing bush, which must be redone, due to too much clearance between cross head and bronze bush.
There was not a single "pop" given from this engine until today, where others are running on shows already hours and hours.
So I think we should wait until it is realy finished and if it will be a runner, hopefully.
In my understanding there is still a long way to go and  up to this point definitive it will be "another".
Another Snow engine for a vitrine or another runner.
Title: Re: another Snow engine
Post by: Xldevil on March 23, 2016, 02:42:31 PM
Hello,Achim.
I'm pretty sure it will become a runner,which would grace any vitrine.
Cheers,Ralph
Title: Re: another Snow engine
Post by: b.lindsey on March 23, 2016, 04:41:48 PM
I hadn't checked in in a while Achim and the progress is astounding. Really nice work!!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on March 26, 2016, 07:18:46 PM
Ralph, Bill thanks for checking in.
The valve story, seems to come to an end now. All valve cages, inlet and outlet are finished.
The valves are keeping the vacuum for 20 sec without any further grinding.
Drilling and threading for the rocker arm bracket fixation was a missing job, but now also done. A nice job for the CNC.
To get a nice finish and good surface for the black burnish, my tumbler was nearly 4,5 hours busy with parts.
Just now the valve cages are getting the blackening.

Title: Re: another Snow engine
Post by: ICEpeter on March 26, 2016, 07:31:36 PM
Hello Achim,
Following along with great interest and very much like your progress and approach in making the various parts. Great job!

Peter J.
Title: Re: another Snow engine
Post by: Dave Otto on March 26, 2016, 09:30:04 PM
Very nice work as usual Achim.

You continue to make great progress; and I enjoy seeing your great pictures and meticulous attention to detail.

Dave
Title: Re: another Snow engine
Post by: vcutajar on March 26, 2016, 09:41:54 PM
Great progress Achim. That photo with the Euro coin really puts it in perspective.

Vince
Title: Re: another Snow engine
Post by: Don1966 on March 26, 2016, 11:37:07 PM
Nice progress Achim and thanks for showing your blacking process. I think you and Dave are in competition when it comes to swarfless machining...... :lolb:


 :wine1:
Don
Title: Re: another Snow engine
Post by: fumopuc on March 27, 2016, 12:31:44 PM
Peter, Dave, Vince, Don thanks for still following along and the friendly comments.
During the tumbling of the valve cages I have finished the side shaft brackets. The parts have been lost for some weeks at the anodising company, but finally they are back now.
The bearing bushes are made by RG 7 (similar to 660 bronze) in a longer pieces, glued and later cut on the mill.
Finally some pictures were we are at the moment after a sample assembly.

Title: Re: another Snow engine
Post by: cwelkie on March 27, 2016, 02:26:53 PM
Simply a thing of beauty Achim.
Such a treat to watch this engine "come to life" by the hands of one so talented.
Charlie
Title: Re: another Snow engine
Post by: Kim on March 27, 2016, 03:26:00 PM
Wow, Achim... that is simply stunning.  The workmanship is amazing, and the color choices really makes things pop.
Great pictures.
Thanks!
Kim
Title: Re: another Snow engine
Post by: fumopuc on March 27, 2016, 08:50:09 PM
Charlie, Kim thanks for your compliments and hopefully it will come to life some day.
Title: Re: another Snow engine
Post by: Roger B on March 28, 2016, 08:58:09 AM
Looking excellent  :praise2:  :praise2: Not that far to go now  :ThumbsUp:
Title: Re: another Snow engine
Post by: joe d on March 28, 2016, 01:09:40 PM
Hi Achim

Still following along, and I really like what you've done so far :ThumbsUp: :ThumbsUp:

Joe
Title: Re: another Snow engine
Post by: fumopuc on May 01, 2016, 01:40:40 PM
Hi Roger and Joe, thanks for watching.
Last weekend I have started to finalise the rocker arm brackets. Partly a good job for the CNC mill.
Two Aluminium bars from the scrap box have been prepared and in the CAD I have added 5 brackets side to side for the CAM program.
The holes for the bearing pins and the pockets could be made in one set up.
After flipping the bars around the pockets at the others side were made and also the dividing line from the brackets could be engraved in one set up for better later orientation during cutting the brackets of the bar.
The slot in the middle could be milled quit simple without CNC.
After cutting the brackets from the bar, a small fixture was necessary to fix them on the CNC mill for contour cutting.
Currently part number 4 is running at the CNC mill.
Title: Re: another Snow engine
Post by: vcutajar on May 01, 2016, 02:18:36 PM
 :ThumbsUp: :ThumbsUp:

Vince
Title: Re: another Snow engine
Post by: Dave Otto on May 01, 2016, 04:22:39 PM
Nice work on the brackets Achim; fun to see how you went about carving them out.

Dave
Title: Re: another Snow engine
Post by: tvoght on May 01, 2016, 04:46:17 PM
An interesting sequence of machining steps, Achim.

Tim
Title: Re: another Snow engine
Post by: fumopuc on May 03, 2016, 08:09:51 PM
Vince, Dave, Tim thanks for checking in.
Here a quick and dirty sample assembling at the engine.
The set screw bore and thread in  M 1.6 to secure the rocker arm pins are still missing and also the general finish of the parts.

Title: Re: another Snow engine
Post by: Don1966 on May 03, 2016, 08:21:41 PM
Achim just catching up on your progress and it's looking great. Your getting closer to that first pop and I am getting anxious to see it in it's glory. Always excellent work to follow.

 :popcorn: Don
Title: Re: another Snow engine
Post by: zeeprogrammer on May 03, 2016, 08:53:41 PM
Nice shot! Always a pleasure to pop in here.
Title: Re: another Snow engine
Post by: b.lindsey on May 03, 2016, 09:06:36 PM
Getting close now it seems Achim. Inspiring as always.

Bill
Title: Re: another Snow engine
Post by: Kim on May 04, 2016, 05:56:54 AM
Wow, Achim, that's really neat looking.  I like how you made those brackets.  Your work never ceases to amaze me!
Kim
Title: Re: another Snow engine
Post by: kvom on May 04, 2016, 01:30:04 PM
Yours is the first I've seen with the blackened aluminum.  I like the look.
Title: Re: another Snow engine
Post by: Roger B on May 04, 2016, 05:55:51 PM
Almost there  :ThumbsUp:  :ThumbsUp: M1.6  ::)
Title: Re: another Snow engine
Post by: fumopuc on May 16, 2016, 08:32:44 PM
Don, Carl, Bill, Kim, Kirk and Roger thanks for following my long term engine build. I appreceate it very much that there are people all over the world which are sharing my, not always successfully efforts to build this model. I the meantime there was some time to finish the rocker arm brackets.
First to do, was these tiny set screw threads (M 1,6 mm) in the brackets to secure the rocker arm pins.
These 1,6 x 3 mm set screws are really tiny, the coin and the tool looks huge and currently I have one in spare only, donīt tell it the shop gnome, please.
With the rocker arm brackets I have made some trials with the tumbler. After the usual process with the little stones I have tried a long time (20 hours polishing with walnut peelings. The result is fine if your are able to feel it, but not really visible at the pictures. A nice to have only.
Next to do was the making of the rocker arm pins. I have modified some of the shelf dowel pins.
A ground recess for the set screw and cutting to length by a Dremel cutting wheel.
Some scrap material used as a stop inside the collet block made it easy to make 9 parts.
A family shot of all parts and a mock up of it with the shafts and set screws.
Title: Re: another Snow engine
Post by: fumopuc on May 16, 2016, 08:40:22 PM
... also starting with the manifolds already. The flanges are made and drilled by the CNC.
A quick and dirty mock up with the tube bendings, not cut to the right lenght.

A virtual milling of the rocker arms is under construction I am waiting for the ordered aluminium plate.
 
Title: Re: another Snow engine
Post by: crueby on May 16, 2016, 09:53:18 PM
Looking great!   :NotWorthy:

For virtual milling, do you have the computer create virtual swarf?   :Lol:
Title: Re: another Snow engine
Post by: Dave Otto on May 17, 2016, 01:56:49 AM
Great progress Achim!

Looking forward to the rocker arm machining.

Dave
Title: Re: another Snow engine
Post by: fumopuc on May 17, 2016, 09:32:08 AM
Looking great!   :NotWorthy:

For virtual milling, do you have the computer create virtual swarf?   :Lol:

I have run the simulation several times yesterday, a quick check under the monitor shows no swarf.
So may be we should talk to the Vetric guys to improve their simulation by some virtual swarf, collected at the bottom of the screen. :lolb:

I do like this simulation very much, it is good to see what will happen later, but unfortunatley there are no clamps or similar in it, so there is still a possible suprise hidden, which last time has killed my brand new 5 mm milling cutter.
Title: Re: another Snow engine
Post by: fumopuc on May 22, 2016, 08:30:57 PM
Dave thanks for checking in.


Chris we do have real swarf now and a lot of.


I have used my set up plate because there is machining from both sides necessary.
Two plates with 5 rocker arms each are prepared for the CNC operation.
Some plywood and wood screws have been very helpfully  to keep everything in position also.
The contour milling was done with 0,4 mm over stock material as conventional  milling in 1,5 mm steps. The final contour was done as one turn in climb modus.
These rocker arms are still partly machined, some additional fixtures and machining will follow.


 

Title: Re: another Snow engine
Post by: fumopuc on May 26, 2016, 05:25:05 PM
Another bank holiday in Germany and some more rocker arms are made.
My next engine will have less parts, sure.
I need a break.



Title: Re: another Snow engine
Post by: vcutajar on May 26, 2016, 05:38:17 PM
Quote
I need a break.

I know the feeling.  When a model takes a long time to finish, the last few parts seem to take longer to do and never ending. 

Vince
Title: Re: another Snow engine
Post by: Don1966 on May 26, 2016, 06:19:47 PM
Achim I am just catching up, but the parts look great to me. Beautiful work even thought it does take time to produce.......... :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: Roger B on May 26, 2016, 07:13:28 PM
Nice work with the CNC mill  :praise2:  :praise2: So the next project isn't an 18 cylinder radial then  :stir:
Title: Re: another Snow engine
Post by: fumopuc on May 26, 2016, 08:21:52 PM
Vince, Don, Roger thanks for the friendly comments.

Roger, I will definitive not start an 18 cylinder radial in the near future.
Under my bench is a casting set of a simple 1 cylinder IC engine, which was following me home from a German Show a couple of years ago.
For me it will be a challenge, because I have never machined a casting before.
Title: Re: another Snow engine
Post by: Tonyr on May 26, 2016, 08:43:49 PM
Hi Achim,
Don't stop just yet, the engine looks great.
I understand how difficult it is to keep going.
I have twice as many parts in the double Snow I am still building.
I have to admit I haven't touched it for months now.
I got tired of looking at it.
I haven't even been on this site for a while.
When I look at it now it looks good again.
I will get back on it soon.
I have quite recently acquired a 1932 Austin seven car.
This has been a welcome distraction.
I too said I was going to build a single cylinder engine next.
Unfortunately I am weak when it comes to engines.
I have started to build a model of the Austin Seven engine, it looked simple !
Obviously not that simple when you get into the details.
I need to get back to the Snow before I go any further with the Austin.
I only have the ignition and a few minor parts to make.
Tony
Title: Re: another Snow engine
Post by: fumopuc on May 26, 2016, 11:47:47 PM
Hi Tony, thanks for the friendly and encouraging comments. Go to know, that you are still making some progress with your version of the Snow engine. This Austin is an interesting project too and I do understand your thoughts.
Title: Re: another Snow engine
Post by: Dave Otto on May 27, 2016, 01:58:50 AM
The rocker arms are looking great Achim!

Dave
Title: Re: another Snow engine
Post by: fumopuc on May 28, 2016, 08:32:27 AM
Hi Dave, thanks for watching and the friendly comment.


Yesterday  I have tried to give the rocker arms some more shape.
First there was a individual machining/fine tuning of each rocker arm width for a good fit in its individual rocker arm bracket with marking of each set.
This self made fixture/finger plate seems to be a good all round tool.
Than the slots for the rollers are milled into the one end.
A family shot of the sample assembly.
Next to do the holes and threading for the adjustment screw/bolt and the cam rollers.
Title: Re: another Snow engine
Post by: Roger B on May 28, 2016, 08:56:36 AM
 :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Kim on May 28, 2016, 04:30:29 PM
Truly amazing Achim!  I love to see your updates!
Kim
Title: Re: another Snow engine
Post by: Dave Otto on May 28, 2016, 11:39:33 PM
Nice work on the rocker arms Achim; the valve train is looking great!

Dave
Title: Re: another Snow engine
Post by: fumopuc on May 29, 2016, 11:40:56 AM
Roger, Kim, Dave thanks a lot for still watching.


For the last shape of the rocker arms, I have chosen the old fashion way with two bushes and the sander.
The parts are in the tumbler now for polishing.

Title: Re: another Snow engine
Post by: fumopuc on May 29, 2016, 11:44:40 AM
When I have had the first roller in my hand, I could not resist to mount it at the engine and to watch the motion.
XxjgeytWWt0Going back now to make some more cam roller.
Title: Re: another Snow engine
Post by: vcutajar on May 29, 2016, 12:17:38 PM
Great progress Achim.

Vince
Title: Re: another Snow engine
Post by: Don1966 on May 29, 2016, 04:09:56 PM
Awesome Achim, bet your all pumped up about now. Great work....... :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: Kim on May 29, 2016, 04:54:41 PM
That motion looks very smooth to me! :)
Kim
Title: Re: another Snow engine
Post by: Roger B on May 29, 2016, 06:19:00 PM
 :ThumbsUp:  :ThumbsUp: It's always good when things move  :)  :)
Title: Re: another Snow engine
Post by: fumopuc on June 05, 2016, 04:47:02 PM
Vince, Don, Kim, Roger thanks for still following along and giving friendly comments.


The rocker arm brackets and rocker arms have spent some hours in the tumbler and will go out of house tomorrow to the anodising company.
This long time polishing (24 hours) in the tumbler with walnut parings and some additional compound has given a very smooth surface.
Next to do are the manifolds. I have started with the intake manifold, the tube bending was done already some time ago, when I have build my new tube bender.
 http://www.modelenginemaker.com/index.php/topic,4369.0.html
So it was time for some mock upīs.
Getting everything one time in the final position took about one hour or so.
Some fiddling around let me start to think of a simple kind of fixture for a two step manufacturing.
Step one, to soft solder the manifold in the fixture without the flanges.
Step two, to solder the manifold at the engine into the flanges, may be.
Title: Re: another Snow engine
Post by: zeeprogrammer on June 05, 2016, 04:53:42 PM
That looks awesome. The manifolds really sets things off too.

That is a fine looking model.
Title: Re: another Snow engine
Post by: Don1966 on June 07, 2016, 02:49:07 AM
Sounds like a plan to me Achim. The manifold is looking good to me also........ :ThumbsUp:

Don
Title: Re: another Snow engine
Post by: fumopuc on June 12, 2016, 07:36:03 PM
.. everything was written and pictures attached, after sending getting the internal server error......
Title: Re: another Snow engine
Post by: sco on June 12, 2016, 07:59:23 PM
When I get that server error it's usually one of the pictures that is for some reason a problem (could be size).  If I use the back button then the text is usually recovered.

Simon.
Title: Re: another Snow engine
Post by: b.lindsey on June 12, 2016, 11:27:51 PM
Sorry about the latest pictures Achim, but the snow is really progressing well. Hope you can get the latest pics sorted out.

Bill
Title: Re: another Snow engine
Post by: crueby on June 12, 2016, 11:34:31 PM
I had same problem the other day, first time in a long time. Opening the pictures in a editor and resaving them solved the problem. Some sort of bug in the forum picture software.
Title: Re: another Snow engine
Post by: fumopuc on June 13, 2016, 06:14:38 PM
...next attempt.
Title: Re: another Snow engine
Post by: crueby on June 13, 2016, 07:14:47 PM
Very nice!!
Title: Re: another Snow engine
Post by: Roger B on June 13, 2016, 07:22:31 PM
Nicely done  :praise2: I like the wire spacers behind the flanges to reduce the heat transfer  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: sco on June 13, 2016, 07:26:53 PM
Great fabrication skills Achim!

Simon.
Title: Re: another Snow engine
Post by: fumopuc on June 13, 2016, 07:35:04 PM
Thanks everybody.
The up load of the same pictures was fine today.
The last picture is showing a no go.
The fuel level in the tank could be much higher than the needel valve in the carburator, so I have to lower the fuel tank by 1/2 or 3/4 of an inch.
Title: Re: another Snow engine
Post by: Kim on June 14, 2016, 05:36:57 AM
Amazing soldering skills there Achim!  I'd be scared to come anywhere NEAR my finished parts with a torch!  I'd scorch anything in sight, I'm afraid.  But it sure worked well for you!

Kim
Title: Re: another Snow engine
Post by: yogi on June 14, 2016, 11:31:43 PM
That manifold turned out beautiful Achim! Great work!  :ThumbsUp:
Title: Re: another Snow engine
Post by: Dave Otto on June 15, 2016, 01:29:15 AM
Nicely done Achim!

Dave
Title: Re: another Snow engine
Post by: fumopuc on July 02, 2016, 11:09:14 AM
Kim, Yogi, Dave thanks for watching and giving friendly comments.


Some progress with the cosmetics of the rocker arms was made.
Also some pictures of the partly mock up.

Title: Re: another Snow engine
Post by: Steamer5 on July 02, 2016, 11:21:35 AM
Hi Achim,
 That is just eye caddy! The engine is looking awesome!
Given the work you have put in I bet she will run very very sweet!

Cheers Kerrin
Title: Re: another Snow engine
Post by: crueby on July 02, 2016, 02:12:52 PM
I love the color scheme, really sets off the parts.

 :popcorn:
Title: Re: another Snow engine
Post by: Dave Otto on July 02, 2016, 03:27:18 PM
That is really starting to take shape Achim!

Yes, nice contrast with the colors.

Dave
Title: Re: another Snow engine
Post by: cwelkie on July 02, 2016, 03:43:49 PM
Stunningly beautiful Achim!  All the extra thought going into planning and executing the "decoration" is really paying off.
Charlie
Title: Re: another Snow engine
Post by: Don1966 on July 02, 2016, 03:48:58 PM
Just awesome Achim all the detailing is really set it of to be a beauty. Excellent work coming out of your shop and .......I...........like............. :Love:


Don
Title: Re: another Snow engine
Post by: scc on July 02, 2016, 09:08:53 PM
Hi Achim,      As a relative "newbie" I am new to the snow engine and your build thread.I am now addicted and following along. Your work is amazing. Thank you for posting in such detail..                regards.............Terry
Title: Re: another Snow engine
Post by: Kim on July 02, 2016, 10:43:59 PM
Looking better with each post, Achim!  I love the color scheme - the red highlights really make things pop!
Kim
Title: Re: another Snow engine
Post by: fumopuc on July 03, 2016, 06:07:56 AM
Hi Kerrin, Chris, Dave, Charlie, Don, Terry and Kim thanks for watching and the always friendly comments. I appreciate it very much that you guys all over the world are following along.
Title: Re: another Snow engine
Post by: kvom on July 03, 2016, 01:58:29 PM
Great color choice!
Title: Re: another Snow engine
Post by: zeeprogrammer on July 03, 2016, 03:46:37 PM
Beautiful!

Everything is perfect Achim.
Title: Re: another Snow engine
Post by: Roger B on July 05, 2016, 03:27:38 PM
Very good detailing  :praise2:  :praise2: Not long now  :ThumbsUp:  :ThumbsUp:  :wine1:
Title: Re: another Snow engine
Post by: vcutajar on July 05, 2016, 09:35:15 PM
Wow Achim. 

Vince
Title: Re: another Snow engine
Post by: fumopuc on July 17, 2016, 09:36:38 AM
KVOM (Kirk ?), Carl, Roger and Vince, thank you very much for still watching my long term Snow build and of course thanks for your compliments too.


Shop time is rare at the moment and life has given some special tasks to solve, what distracts me a bit from the Snow build.
Never the less, I have found some time to shorten the tank rack by 25 mm. The upper possible fuel level should be same hight like the needle valve in the carburettor now.
Hopefully it is  at the right position now.
Title: Re: another Snow engine
Post by: Kim on July 17, 2016, 03:24:52 PM
I understand how life just keeps coming at you and taking up all your shop time.
That looks beautiful Achim!  Your work on this engine is simply amazing!
Kim
Title: Re: another Snow engine
Post by: fumopuc on July 24, 2016, 07:46:55 PM
Hi Kim, thanks for watching.


The water outlet tubes are nearly made now.
Some flanges made on the lathe, a small fixture for drilling all first and than the later contour milling on the CNC mill.
Another fixture to keep everything in place for the soft soldering.
Title: Re: another Snow engine
Post by: crueby on July 24, 2016, 09:22:25 PM
Very nice, as always!

 :popcorn:
Title: Re: another Snow engine
Post by: b.lindsey on July 24, 2016, 09:23:39 PM
Those look great Achim. You should be getting close now!!

Bill
Title: Re: another Snow engine
Post by: Adiabatic on July 24, 2016, 09:29:53 PM
Achim, I haven't gazed at this thread for a while now. That is some seeeeeeriously high quality workmanship you have done there. :NotWorthy: ...OZ
Title: Re: another Snow engine
Post by: Dave Otto on July 26, 2016, 12:48:53 AM
Hi Achim

Good to see progress; the water piping is a very nice piece of work.

Dave
Title: Re: another Snow engine
Post by: Don1966 on July 26, 2016, 01:34:02 AM
Masterful work Achim and still following you........ :praise2:


Don
Title: Re: another Snow engine
Post by: fumopuc on July 26, 2016, 08:47:58 PM
Chris, Bill, Oz, Dave and Don thanks for still following along. It is a good to know that you are still interested and following this build log. And of course thanks for the compliment.

The very last missing big part is the exhaust pipe now.
But to make it in the same way like the intake manifold I do need the exhaust valve cages mounted.
To mount them I have to make first the last missing studs.
To fix the studs and the valve cages, the cylinder units have to be removed from the  sub base.
If the cylinder units are removed, the sealing between the lower hidden bolts and the water jackets has to be made.
There are still no lip seals at the cylinder ends around the piston rods.
And do I still have a good electrical ground connection from the ignition system to the plugs ?
There are some paper gaskets and  anodised aluminium now between.
But Bill, yes in relationship to what  has been made up to this point , I am close now.
Title: Re: another Snow engine
Post by: Tjark on July 26, 2016, 09:15:24 PM
Achim, I had a little time left today and have looked in your build log off the Snow engine.
Still follow your build and amazed every time I look to your progress.
It’s a superb job.

   Tjark.
Title: Re: another Snow engine
Post by: fumopuc on August 06, 2016, 07:17:00 PM
Hi Tjark, thanks for checking and the friendly comments.


I have had some time to go ahead with the coating of the last made parts.
First the water outlet or top tubes have been coated.
On tube was a bit to hot in the oven, so the soldering came loose and a flange against the tube  was not aligned any more.
For me a signal to check and to control the temperature more accurate..
To fix it again, the tube was mounted at the soldering fixture again heated up to 210 C° and carefully adjusted into the right position by a 3 mm bolt, screwed into the outlet side.
The powder coating at this temperature is so soft and elastic, that is has followed the 10° to 15° turning without any problem.
Next coating object was the carburettor, everything disassembled and plugged.
In a RC shop I have found a nice air filter, which was easy to modify for this purpose.
On the oven thermometer is still 170 C° visible, a good temperature for my soft soldered parts without any damaging risk for my 220 C° soft soldering wire.
The high tec carb with air filter on it, is in my opinion now optical wise much better integrated into the over all picture of the Snow model engine.
Title: Re: another Snow engine
Post by: b.lindsey on August 07, 2016, 12:57:50 AM
Looking better and better Achim. Great pictures also.

Bill
Title: Re: another Snow engine
Post by: Dave Otto on August 07, 2016, 01:21:34 AM
Looks great Achim!

The air cleaner makes the little RC carb look a little more industrial; nice touch.

Dave
Title: Re: another Snow engine
Post by: Rustkolector on August 07, 2016, 03:51:40 AM
Achim,
Often when starting the Snow it is not uncommon for a large air bubble to form at the inside base of one or more of the coolant drain funnels due to the beginning intermittent coolant flow. These bubbles get stuck at the base of the funnels and cause coolant to overflow making a mess of your nice engine before you even notice it. To prevent these overflows solder a single fine strand of copper wire, removed from a piece of #14 electrical wire, to the inside of the outlet tube and extend it down to the bottom of each funnel. This fine wire is hardly noticeable and will prevent the formation of these bubbles. This only happens when flow is beginning, or if flow becomes intermittent for any reason.

I have followed your Snow build from the beginning. Very nice work.
Jeff
Title: Re: another Snow engine
Post by: fumopuc on August 07, 2016, 09:08:30 AM
Bill, Dave thanks for following along.


Jeff, thanks for your suggestion. It is always good to have a plan if something unexpected happens. Good to have a solution already.Thanks for the compliment too.

Title: Re: another Snow engine
Post by: Roger B on August 07, 2016, 08:13:22 PM
Coming along very nicely  :praise2:  :praise2: I like the powder coated carb  :ThumbsUp: :ThumbsUp: Nearly there  :)
Title: Re: another Snow engine
Post by: Don1966 on August 08, 2016, 12:56:13 PM
Another professional addition to a beautiful engine Achim. Your getting closer my friend to a runner...... :praise2:

Don
Title: Re: another Snow engine
Post by: fumopuc on October 09, 2016, 04:42:45 PM
Roger, Don thanks for checking.


I am back in the "Snow" business.
The nearly last item, the exhaust manifold.
It is a challenging part. There is not very much room available around all these pipes.
It will try it step by step.
First the long tube with the bracket to fix it at the sub base.
Than the 4 holes in this long tube will be prepared, followed by a fixture to solder the bended tubes into the long collector tube.
Finally the soldering between the flanges and the rest of the manifold direct at the engine, like done with the inlet manifold.
Thatīs  the plan.....
Title: Re: another Snow engine
Post by: vcutajar on October 09, 2016, 05:06:17 PM
Nice to see you back at the Snow Achim.

Vince
Title: Re: another Snow engine
Post by: Dave Otto on October 09, 2016, 05:57:37 PM
Hi Achim

Good to see you back in the shop. That does appear to be challenging part but I'm sure it will come out great; just like all your other work.

Dave
Title: Re: another Snow engine
Post by: fumopuc on October 30, 2016, 09:10:25 AM
Vince, Dave, good to know that your are still with me in this long term project.


A bit progress with the exhaust system.
At the end of the long collector pipe is a block which will be used for the fixation at the sub base also.
Here is also the interface for any further pipe installation.
In Doug`s drawings is a threaded hole for a discharge elbow.
In my version, there is, as already started in the last posting, a clamp to connect any further tubing with a 2mm bolt.
At the moment I have a strait tube only, but may be later a bending with a silence or something similar can be mounted here either.
The visible drill bit is for marking the missing hole for the water pipe fixation bracket.
These pipes should be fixed in their final position before any further exhaust pipe work will be made.
Room is not so much available in this corner of the model.

Title: Re: another Snow engine
Post by: b.lindsey on October 30, 2016, 12:38:42 PM
Great to see further progress Achim. Shouldn't be too long until we can see this beauty running  :whoohoo:

Bill
Title: Re: another Snow engine
Post by: Kim on October 30, 2016, 02:51:06 PM
Nice pipe work Achim!  Somehow I missed your previous post and wasn't up to date!
I'm glad to see you making progress. Your engine is magnificent!
Thanks,
Kim
Title: Re: another Snow engine
Post by: fumopuc on October 30, 2016, 04:28:48 PM
Hi Bill and Kim thanks for watching.


Today was the day of disassembling so I am far away of any running.
I had to mount all the lower valve cages with the exhaust valves first time.
With my stud and nut concept for the fixation, the only way to do this in a proper way is to take the cylinder unit of.
With the flanges in the camshaft an easy going.
Some studs had to be made and at the end of the day, the lower units are fixed.
But to be honest it looks at bit sad at the base plate.
Title: Re: another Snow engine
Post by: Dave Otto on October 30, 2016, 04:37:07 PM
There is an amazing amount of time consuming work at this stage. I like the exhaust piping and stack base with the clamp; it fits right in with all your other very nice details.

Good to see progress Achim.


Dave
Title: Re: another Snow engine
Post by: Don1966 on October 30, 2016, 06:26:22 PM
There is an amazing amount of time consuming work at this stage. I like the exhaust piping and stack base with the clamp; it fits right in with all your other very nice details.

Good to see progress Achim.


Dave
What Dave said and .......I........like.......... :Love:

Don
Title: Re: another Snow engine
Post by: Roger B on October 30, 2016, 06:29:15 PM
That engine has some pretty complicated plumbing  ::) Still following along and awaiting the first trials  :)  :wine1:
Title: Re: another Snow engine
Post by: vcutajar on October 30, 2016, 09:19:46 PM
Thanks for the update Achim.  Still following along.  Why is it that the final parts take so long to make?

Vince
Title: Re: another Snow engine
Post by: fumopuc on October 30, 2016, 11:37:14 PM
Thanks for the update Achim.  Still following along.  Why is it that the final parts take so long to make?

Vince

Hi Vince, may be because we postpone them to the end and we excuse oneself by doing easier or nicer things in advance ?
Title: Re: another Snow engine
Post by: cwelkie on October 31, 2016, 01:03:31 PM
I'm silently watching from the sidelines in great admiration for your work on this engine and its display.  It is coming along beautifully.  I imagine you are savouring every part along the way.
Charlie
Title: Re: another Snow engine
Post by: fumopuc on October 31, 2016, 03:02:17 PM
Roger, Don,  Dave and Charlie, thanks for watching and the friendly words.

This morning the hole for the water plumbing fixation was made.
I have used the little Proxxon drill press for it and made it moveable. Let`s call it Chris (crueby) method.
Also the thread cutting could be done with the chuck of the drill press, turning it by hand and adjusting the lever with the other hand.
So the water plumbing is fixed now at a specified position and the exhaust has to pass it now, hopefully.
Title: Re: another Snow engine
Post by: Roger B on October 31, 2016, 03:11:03 PM
When I use my little Proxxon drill for tapping I always take off the cover, remove the drive belt and turn the pulley by hand.
Title: Re: another Snow engine
Post by: crueby on October 31, 2016, 03:17:46 PM
Its definitely handy to be able to take that drill press to the work for baseplates that would be too hard to hold on a larger floor standing drill press.
Title: Re: another Snow engine
Post by: fumopuc on November 06, 2016, 04:12:20 PM
At the end of a whole day fiddling around I learned a very important lesson, which means that my CAD and my model is very close.
I have tried to go ahead with the exhaust manifold, but I had to recognize and accept, that my bending with r=22 mm for the 7 mm brass tube is working nice, but this pipe bend does not fit in this application. 
The first bending has shown it already and also the attempt to bend 120° instead of 90° was not successful.
Good to know that the CAD does give a confirmation.
I will try it with a smaller bend radius, but that means to make some new tools.
Title: Re: another Snow engine
Post by: vcutajar on November 06, 2016, 08:23:22 PM
Hi Achim.  I don't know if I am going to suggest something stupid, but here goes.  How about making a 90 degree elbow?

Vince
Title: Re: another Snow engine
Post by: fumopuc on November 13, 2016, 04:52:39 PM
Hi Vince, yes a 90° elbow with a radius less than 18mm could solve the problem.
Unfortunately I do not have  the tools for my bending system, so I have to make them.
The bending with the radius of 22 mm is already a challenge for the 7x0,3 mm brass tube so I have change my mind and didnīt try it with the smaller bending radius.


The final and very easy solution is shown in the two pictures now.
"Mr. Doug Kelley, I apologize for not staying with your excellent design, but sometimes a very special task does need an easy solution."
Title: Re: another Snow engine
Post by: crueby on November 13, 2016, 05:32:29 PM
Here is another way of making elbows/tees with no bending, turned parts then soldering:

http://www.modelenginemaker.com/index.php/topic,5980.msg127633.html#msg127633
Title: Re: another Snow engine
Post by: Roger B on November 13, 2016, 07:48:25 PM
A nice solution to the problem  :ThumbsUp:  :ThumbsUp:  :wine1:
Title: Re: another Snow engine
Post by: fumopuc on November 27, 2016, 06:11:55 PM
Hi everybody, a dark and wet day here in Munich so it was shop time.
Some soldering was done and the exhaust manifold is nearly finished.
A hard solder was used to fit the 4 straight short tube pieces into the collector pipe.
First picture shows the final mock up which was made.
The position, length of the single pipes in the flanges, was marked with a scriber followed by the next partly disassembly of the engine.
The already at the intake manifold proofed heat isolation set up was made with the 1 mm SS wire again.
Some heat protection with aluminium sheet, has given enough covering for not melting  the paint/powder again.
The flux is from the local plumber shop and the soft solder has a melting point at 220°C so an easy job for the micro torch.
Finally the manifold polished and again fitted together with the engine.
Next to do, a muffler.

Title: Re: another Snow engine
Post by: fumopuc on November 27, 2016, 06:25:30 PM
... and the muffler.
The rest of a 25 mm brass tube and some fittings from the plumber shop.
The body, 25 mm tube with side plates, was fixed with silver solder, the rest with soft solder.
Title: Re: another Snow engine
Post by: Roger B on November 27, 2016, 07:48:22 PM
Not long now  :ThumbsUp:  :ThumbsUp: I like the way you space the flanges with some lengths of wire to reduce heat transfer  :praise2: I might try your muffler design for my vertical engine  :wine1:
Title: Re: another Snow engine
Post by: Dave Otto on November 27, 2016, 08:55:00 PM
Nice progress and update Achim.

I really like the way the exhaust manifold turned out; I tend to like it better that one stock one with the curved pipes. The muffler also turned out great!
Like Roger said; good idea using the wire to space the flanges; I will file this one away for use in the future.


Dave
Title: Re: another Snow engine
Post by: Don1966 on November 27, 2016, 09:36:49 PM
Very nice progress and some excellent tips learned here..... :NotWorthy:


Don
Title: Re: another Snow engine
Post by: fumopuc on December 11, 2016, 05:43:56 PM
Hi Roger, Dave and Don, thanks for watching and the positive comments.


Today the muffler and exhaust story was nearly finished. The outlet elbow has got a slot and a bush with a 2 mm screw to clamp it at the pipe ends.
Version #1 is the muffler version and version #2 the strait pipe with the elbow also clamped at the end.
Everything is now powder coated already.

Title: Re: another Snow engine
Post by: b.lindsey on December 11, 2016, 03:45:58 PM
Are you doing your own powder coating Achim or having it done.  Which version of the pipe do you prefer?

Bill
Title: Re: another Snow engine
Post by: fumopuc on December 11, 2016, 05:58:42 PM
Hi Bill, it is home made.
A discounter toaster oven is the furnace to burn it in.


To be honest, no favourite pipe until now.
Title: Re: another Snow engine
Post by: b.lindsey on December 11, 2016, 04:07:38 PM
Nice Achim, it is something I have wanted to try.

Bill
Title: Re: another Snow engine
Post by: vcutajar on December 11, 2016, 05:02:16 PM
Both exhaust sytems look good Achim.  My preference would be the one with the muffler.

Vince
Title: Re: another Snow engine
Post by: Tjark on December 11, 2016, 10:15:14 PM
Achim, as always beautiful work.
I like the muffler and would build the outlet strait up as you have in the last picture.

    Tjark
Title: Re: another Snow engine
Post by: Rustkolector on December 11, 2016, 09:13:51 PM
Achim,
It looks like your Snow will be running soon. We are getting anxious to see it run. I first used the original vertical exhaust stack in the Snow drawings for my engine. I quickly changed that to a horizontal exhaust discharge. I didn't like that either. Attached is a photo of the ~40 mm dia. muffler I now use for my Snow. A few other Snow owners use something similar. Mine is large and bottom weighted since it is free standing next to the engine and connects with a flexible vinyl hose. The top flange is slip fit and removable. It was built primarily as a liquid trap to remove the Snow's abundant exhaust condensate that will include some black unburned lube oil. While the Snow is a fun engine to run and very interesting to watch, I think you'll find it gets messy at the exhaust end. This type of muffler/trap contains the mess and gives a dry exhaust. You might want to consider something similar.

Jeff
Title: Re: another Snow engine
Post by: gldavison on December 12, 2016, 05:28:57 AM
Achim,

Like Jeff said, the exhaust  will spit oil. I also built a oil collecting muffler. My first few runs left a string of oil spots across the shop floor.

Absolutely beautiful work you are doing.

Gary

Title: Re: another Snow engine
Post by: fumopuc on December 12, 2016, 07:26:04 PM
Hi Vince, Tjark, Jeff and Gary,
thank you very much for your friendly words and comments. I appreciate it very much.
During the last time I have seen some videos of the model Snow engine running at Names or similar shows.
I have seen also that  there was sometimes a muffler like you have shown near the exhaust or minimum a cleaning cloth with the already mentioned oil on it.
This was the reason why I have had the idea with the muffler.
The below added picture is showing what I have had in my mind, if the engine will spit oil.
Title: Re: another Snow engine
Post by: fumopuc on December 18, 2016, 03:28:59 PM
Hi everybody, the final powder coating is done.
Exhaust, sub base for the exhaust and muffler have got their final colour now.
Everything is fixed now also.
So now excuses any more, I have to disassemble the  cylinder unit now and to put the viton lip seals in place.
Also the flywheel unit needs a further disassembly, because the clamping is not as fixed as it should be.
A hard stopping of the crankshaft lets the flywheel turning on the shaft a bit.
The last picture shows what an operator would see.
Title: Re: another Snow engine
Post by: Don1966 on December 18, 2016, 05:34:12 PM
Achim your work has been outstanding and you have a beautiful engine to show for it. Every detail has added beautiful details to your efforts. Waiting for your first engine pop and it running.........I.........like......  :Love:


Don
Title: Re: another Snow engine
Post by: crueby on December 18, 2016, 04:24:42 PM
The powder coating looks terrific, as does the engine!
Title: Re: another Snow engine
Post by: Kim on December 18, 2016, 07:00:42 PM
Beautiful work, as always Achim!
I love that last shot down the side of the engine, seeing all the rocker arms.
Looking forward to the video! :)
Kim
Title: Re: another Snow engine
Post by: Roger B on December 18, 2016, 10:42:54 PM
Excellent  :praise2:  :praise2: Video next?  :stir:
Title: Re: another Snow engine
Post by: Dave Otto on December 20, 2016, 02:47:08 AM
Very nice Achim!

I hate seeing it coming to an end; but I'm sure you have another project waiting.

Daev
Title: Re: another Snow engine
Post by: fumopuc on May 07, 2017, 02:37:04 PM
Hi Dave,
due to some special circumstances, I had to make a brake with the Snow engine, so we will have some more time to an end.

As mentioned in the Hoglet post already, I try to improve the clamping of the taper in the flywheel.
The machined taper in the cast iron flywheel has not the best surface quality, I have to speak with the guy who has made it.
So after disassembling the flywheel my idea was a kind of grinding or better lapping action to get rid of some friction between taper and flywheel.
The taper and a piece of 12 mm silver steel was quickly and temporary glued together with a 2 component epoxy glue.
My automotive valve grinding paste had to do the job.
At the moment everything seems to be fitted very well but with the wrong bolts, these at the flywheel in the lathe do have the wrong, to big, head.
I will let it like this for some days and will try to swap the bolts step by step without losing any tension hopefully later.
Another very good issue, the ground check from the ignition box to all spark plugs via the entire engine with most of the gaskets in was positive.
Title: Re: another Snow engine
Post by: fumopuc on May 25, 2017, 12:40:48 PM
Hi everybody, another bankholiday in Germany and the final tiling and some grouting is done, not my favourite job.
Always a big mess.

 
Title: Re: another Snow engine
Post by: Admiral_dk on May 25, 2017, 07:41:26 PM
Quote
the final tiling and some grouting is done, not my favourite job.

At least you're moving in the right direction Achim  :ThumbsUp:

Are you planning on a bit of "wear and tear" and other ways of getting some "patina" on those shiny tiles  ;)
Title: Re: another Snow engine
Post by: fumopuc on May 25, 2017, 08:02:31 PM
Quote
the final tiling and some grouting is done, not my favourite job.

At least you're moving in the right direction Achim  :ThumbsUp:

Are you planning on a bit of "wear and tear" and other ways of getting some "patina" on those shiny tiles  ;)


Thanks



Hopefully some splashing oil will do this.
Title: Re: another Snow engine
Post by: Flyboy Jim on May 26, 2017, 04:35:18 AM
Your tile work looks great Achim!  :ThumbsUp: Adds a lot to the scene.

Jim
Title: Re: another Snow engine
Post by: Dave Otto on May 26, 2017, 04:17:49 PM
Yes what Jim said; the tile and grout looks very nice!


Dave
Title: Re: another Snow engine
Post by: fumopuc on May 26, 2017, 07:19:06 PM
Jim, Dave thank you very much.
The last grouting was finished this mornig.
Tomorrow hopefully will be the day, to get the pump, the flywheel, the fuel cell with rack and the water tank back in position.
Title: Re: another Snow engine
Post by: fumopuc on June 06, 2017, 08:19:11 PM
I thought it makes sense to add this link
http://www.modelenginemaker.com/index.php/topic,7142.msg150292.html#new (http://www.modelenginemaker.com/index.php/topic,7142.msg150292.html#new)
here, because in the other thread is my misharpe and descpition about what could be done wrong hidden.
Title: Re: another Snow engine
Post by: fumopuc on June 11, 2017, 03:24:18 PM
Hi everybody, all lip seals are in position now.
The engine is again driven by the e-motor for another 5 hours with the same power input and revs like before the disassembling.
As Doug Kelley recommended, I have made a pressure test unit to check the pressure under compression. This will be done next.
The short adapter was nice to fit without removing the fuel cell rack.
Unfortunately I have done the measurement without the inlet manifold in place, which has caused a collision with the housing of the pressure gage.
So a longer one was made and I will have to remove the fuel cell with its rack for the compression test.
An adjustable timing wheel is also prepared in the meantime.

Title: Re: another Snow engine
Post by: vcutajar on June 11, 2017, 05:56:07 PM
 :ThumbsUp:

Can't wait to see it run.

Vince
Title: Re: another Snow engine
Post by: fumopuc on June 11, 2017, 07:29:30 PM
:ThumbsUp:

Can't wait to see it run.

Vince


Hi Vince, me too.
But I think there it is still a piece of way to go.
Title: Re: another Snow engine
Post by: Roger B on June 12, 2017, 12:00:04 PM
Some more good progress  :ThumbsUp:  :ThumbsUp: I'm still following along and awaiting the first pops and bangs  :wine1:
Title: Re: another Snow engine
Post by: fumopuc on June 12, 2017, 12:20:33 PM
Some more good progress  :ThumbsUp:  :ThumbsUp: I'm still following along and awaiting the first pops and bangs  :wine1:

Thanks Roger.

... may be "banging" my head against a wall, because it doesn`t work the way like expected.
The pressure test, with all valve cages in position, will give more information, hopefully next weekend.
Thanks Roger
Title: Re: another Snow engine
Post by: fumopuc on June 19, 2017, 12:27:37 PM
Hi everybody.
Last weekend I have done the timing in accordance to the intructions of Doug Kelley.
I took the opportunity to catch a bit more of the driven motion in a video.

W1OTz-MJgnY
If this thing will ever run, perhaps, nobody will see this beatiful smooth motion anymore.
Title: Re: another Snow engine
Post by: fumopuc on June 25, 2017, 12:37:03 PM
Hi everybody, today was the day of the final ignition set up. Before I will assemble the inlet valve cage, hopefully finally, there was a good opportunity to see the spark plugs in the combustion chamber and to check the function.
The adjustment, 8° before TDC was easily done, but I have noticed a strange behaviour of the sparks already.
Than the mess started, sparks, no sparks, weak sparks, sometime sparks, two sparks in less than half a second ............I hate it.
Ground check to the socket of the spark plugs was perfect. Power was perfect.
Checking all the wiring and than detecting some copper visible at the hall sensor wires coming out of the adhesive at the lower distribute part.
I have send Roy from S/S some pictures and an order for a new lower distributor with hall sensor.
Has anybody out there seen any similar problem ?
Would be happy about any comments.
Title: Re: another Snow engine
Post by: GordonL on June 25, 2017, 02:23:16 PM
What are you using for the ignition system? TIM 6 or S&S ignition or other?
Title: Re: another Snow engine
Post by: Ye-Ole Steam Dude on June 25, 2017, 02:49:48 PM
Hope to see it running real soon and the beautiful smooth motion.
Title: Re: another Snow engine
Post by: fumopuc on June 25, 2017, 03:39:27 PM
What are you using for the ignition system? TIM 6 or S&S ignition or other?


Hi Gordon, it is a S/S System from Roy Sholl.

Title: Re: another Snow engine
Post by: GordonL on June 25, 2017, 05:29:20 PM
I am also using the S&S system and have a weak spark but I had some other problems and had to disassemble it again so I did not do a lot of testing. I will put it back together again this week and try again.

I am not sure if the contacts in the distributor are actually supposed to make positive contact or if they will bridge a small gap. I have never used a distributor before.
Title: Re: another Snow engine
Post by: fumopuc on June 25, 2017, 05:56:26 PM
Hi Gordon, some time ago the system was sparking without any problem.
https://youtu.be/GH2eLATDuis
https://youtu.be/Ie4K9w6_0ig
So I have made something wrong.
I will ask Roy for his timing light and hall switch tester also, so I hopefully will be able to check the funcition of this in future.
Title: Re: another Snow engine
Post by: fumopuc on June 25, 2017, 06:02:06 PM
I am also using the S&S system and have a weak spark but I had some other problems and had to disassemble it again so I did not do a lot of testing. I will put it back together again this week and try again.

I am not sure if the contacts in the distributor are actually supposed to make positive contact or if they will bridge a small gap. I have never used a distributor before.


The center of the finger should have contact to the center contact in the cap, to each cylinder the small gap will be bridged.
Title: Re: another Snow engine
Post by: fumopuc on June 27, 2017, 05:37:04 PM
As usual I have got a long mail from Roy at S/S with some comments and tipps.
I have ordered his little hall switch tester also, to be able to check the funcition of a hall sensor in future when ever needed.
So now I have to wait for his parcel and than I will replace the hall sensor and do some testing to get the lost sparks back.
Title: Re: another Snow engine
Post by: Tjark on June 28, 2017, 05:15:05 PM
Hello Achim,

I gave it some thoughts about your problem.
Did you had to put the magnet into the housing for the second time?
The HAL sensors are sensible to north and south pole off the magnet.

       Tjark.

Title: Re: another Snow engine
Post by: fumopuc on June 28, 2017, 05:55:24 PM
Hello Achim,

I gave it some thoughts about your problem.
Did you had to put the magnet into the housing for the second time?
The HAL sensors are sensible to north and south pole off the magnet.

       Tjark.


Hi Tjark,
here is the link to that part of this thread where I have done the O.K. test.
http://www.modelenginemaker.com/index.php/topic,4060.60.html
At this time I thougt all is O.K.

Title: Re: another Snow engine
Post by: Tjark on June 29, 2017, 06:50:23 PM
Achim, i have seen your spark test and this was okay.
But I had made a mistake when I disassembled everything and  put back together.
I had put the magnet the wrong way in.
That’s why I put this remark.
When you have made no changes it shut be working okay now also.
Then it’s a shame that it’s not working now.
Hope you soon sorted out the problem.


  Tjark.
Title: Re: another Snow engine
Post by: fumopuc on June 29, 2017, 07:17:42 PM
Hi Tjark, thank you very much for your thoughts and comments.
The disk with the magnets inside, is fixed by a set srew. If I assemble the disc wrong way around, I can not see the flange with the set screw anymore, so it is unlikely to do it the wrong way.
I am waiting now for the little hall switch tester from S/S and than I will be able to check the function of the sensor indipendent from the whole system. This will give the way for further trouble shooting.
Title: Re: another Snow engine
Post by: Roger B on July 05, 2017, 08:39:48 AM
I'm still following along  :wine1: I hope you get your ignition problems sorted out soon   :headscratch:  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on July 22, 2017, 09:56:37 AM
Hi Everybody, this morning was the day to look for the first pops of my Snow engine.
Ignition was checked some days earlier and also the compression test was, in my eyes, fine.
So I have opened the chemical lab to prepare the mystery mixture. I have started with 50:1.

Title: Re: another Snow engine
Post by: fumopuc on July 22, 2017, 10:05:32 AM
... with the help of the power screwdriver I have got the following result.
Y2fIxCm7aQMI do not have the time yet to continue with the experiments, but a quick measurement with the laser thermometer shows cylinder #1 and #2 with nearly 55°C to 45°C and cylinder #3 and #4 with only 30°C to 40°C.
So I should know were to attack tomorrow.
 


Title: Re: another Snow engine
Post by: Ye-Ole Steam Dude on July 22, 2017, 10:39:19 AM
Looking forward to a long video of this engine running.
Title: Re: another Snow engine
Post by: vcutajar on July 22, 2017, 11:07:53 AM
That looks promising Achim. 

Vince
Title: Re: another Snow engine
Post by: Roger B on July 22, 2017, 04:24:33 PM
Excellent  :ThumbsUp:  :ThumbsUp: That will keep you busy tomorrow  ::)  :headscratch:
Title: Re: another Snow engine
Post by: Kim on July 22, 2017, 04:29:38 PM
All I can offer is encouragement, Achim, but I know you will figure it out!
It looks quite exciting, that's for sure! :)
Kim
Title: Re: another Snow engine
Post by: Dave Otto on July 22, 2017, 05:26:08 PM
Congrats on the first pops Achim!
Looking forward to seeing more.

Dave
Title: Re: another Snow engine
Post by: kvom on July 22, 2017, 06:11:47 PM
Won't be long now.  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on July 23, 2017, 02:34:08 PM
Thanks everybody for the encouragement and the friendly comments. Shop time is rare but some further investigation could be done.
I could feel always some knocking in the crank drive, so I have checked the ignition timing again.
And there was already a failure detected. Target was 8° pre-ignition and my adjustment was done to 18°.
The reason was a wrong made temporary mark at my self made angle disc.
All this is fixed now, but a new issue appeared, the fly wheel get loose again.
It started slowly, but than oil or grease has increased the loosening process, it behaves now like a fidget spinner.
I have to fix this first now.
Title: Re: another Snow engine
Post by: Kim on July 23, 2017, 03:37:38 PM
This is an expensive fidget spinner Achim!  ;D
Those flywheels give people real problems don't they?
Maybe you just need to put a key in to hold it in place?
Kim
Title: Re: another Snow engine
Post by: b.lindsey on July 23, 2017, 04:11:24 PM
At least you are getting close Achim. I feel sure you will have it running very soon.

Bill
Title: Re: another Snow engine
Post by: fumopuc on July 23, 2017, 04:53:58 PM
Hi Bill thanks, I will try to do my best.


Kim, I have had something like your proposal in my mind also.


Here are some quick sketches, what is the opinion of the Snow engine experts to this idea ?
All comments are appreciated.
Title: Re: another Snow engine
Post by: crueby on July 23, 2017, 08:28:58 PM
On my Corliss Twin build I used a taper-lock hub, using the design that Chuck Fellows had posted. You can see it made in my Corliss build, posts 263 and 264. I wish I could find the post that Chuck did about them but at least I had saved off the contents with the diagram, here it is:

Title: Re: another Snow engine
Post by: fumopuc on July 23, 2017, 08:46:24 PM
Hi Chris, the design you have shown will clamp much better than the design used in the drawings of the Snow engine.
Your design is much thinner in the taped area so a deformation and clamping will be easier possible.
The taper of the Snow engine is over 30 mm at the big end, the shaft is only 12 mm.
So a lot of force ist necesseray to squeeze it together with the four 4 mm bolts pulling the taper.
May be I will use some Loctite 648 to fix the taper at the shaft and than the fly wheel can be bolted against the taper.
This may be could be the easiest repair solution in this case.
Title: Re: another Snow engine
Post by: Roger B on July 24, 2017, 11:23:10 AM
Hi Achim, what is the taper angle on the Snow design? Does the slit in the taper bushing go through to the other side to give more flexibility? I used quite a shallow angle on the bush for my two stoke diesel, it has held so far  ::)

You could always cheat and buy one of these  :) :

http://www.sigerist.ch/spannzange-schraubenlos-edelstahl-1-4301/?lang=en

Keep up the good work  :ThumbsUp:   :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on July 24, 2017, 01:05:44 PM
Hi Achim, what is the taper angle on the Snow design? Does the slit in the taper bushing go through to the other side to give more flexibility? I used quite a shallow angle on the bush for my two stoke diesel, it has held so far  ::)

You could always cheat and buy one of these  :) :

http://www.sigerist.ch/spannzange-schraubenlos-edelstahl-1-4301/?lang=en

Keep up the good work  :ThumbsUp:   :ThumbsUp:

Hi Roger, thanks for your thoughts.
The angle is 5° and made in one set up at the lathe to both parts, fly wheel and taper.
But as mentioned earlier, it is difficult to get a proper clamping with this thick taper.
 
Title: Re: another Snow engine
Post by: Roger B on July 24, 2017, 01:33:55 PM
Hi Achim,

I used a 3° angle on my bush (there is a PDF of the drawing on my last post). If you split the bush further as in this picture it may clamp better.
Title: Re: another Snow engine
Post by: Hugh Currin on July 24, 2017, 04:21:08 PM
On my Corliss Twin build I used a taper-lock hub, using the design that Chuck Fellows had posted.....

I used a taper lock on my Webster build.  Here, starting with post #67 (http://www.modelenginemaker.com/index.php/topic,2981.60.html) documents my adventure with taper lock and QD type flywheels. Post #73 points to Chuck Fellows' thread. Post #74 gives the difference between "taper lock" and "QD" types.

In the Webster the timing gear is attached to the flywheel. If the flywheel slips it throws off the engine timing. I had problems with this. Further in the thread,  starting with post #171 (http://www.modelenginemaker.com/index.php/topic,2981.165.html) documents my efforts to solve this. I finally went to a shaft key.

Hope this is of interest. Thanks.

Hugh
Title: Re: another Snow engine
Post by: fumopuc on July 30, 2017, 07:28:19 PM
Getting a Snow engine alive, next episode.


First of all thank you very much for all your thoughts and comments.


Next to say, the fidget spinner has left the room.


After getting the 4 mm keybroach last week from arceurotrade I have done the decision not to use it for this problem. So I have marked the gear train and took the crankshaft with flywheel off.
A gauge was made for a proper positioning of the taper on the shaft.
The taper was fixed with Loctite 648.
Next attempt for a fire up, but still heat in cylinder 3 and 4 only, cylinder 1 and 2 cold.
Getting a sneaking suspicion, that the compression is lost.
Loss of compression confirmed by measuring with the pressure gage.
In my opinion, there could be only one reason for this, the piston is not fixed to piston rod any more.
Next decision, to open cylinder #1 at the end of the engine. A view into it confirmed my suspicion.
Taking the piston rod from #1&#2 off carefully, a good opportunity to make the forgotten chamfer at it first.
The set screws were fixed with Loctite 222 now.
Now I had to get it in again without any further disassembly if possible. So a sleeve had to be made, inner diameter same as cylinder, outer diameter a little bit smaller than the inner diameter of the combustion chamber. One side with a big smooth chamfer to help the piston ring gliding into the sleeve.
The next attempt to fire up was not so bad, I could measure the same heat in all four cylinders now, but running without the help of the power screwdriver last only for 2 to 3 seconds an than the engine dies.
I think I cannot find the right carburettor adjustment.
Using an ENYA 09-IV (09430) carburettor, I have seen the recommendation here in forum, should be the right way, but to be safe I will try the little OS carburettor from the Hoglet next, to get any feeling about this things.
I do understand now why some people prefer to build single cylinder engines only.
Title: Re: another Snow engine
Post by: Roger B on July 30, 2017, 08:38:58 PM
More progress  :ThumbsUp:  :ThumbsUp:  A fairly simple carburettor should allow to run at some fixed speed, the problem may be somewhere else. Have you rechecked the ignition timing? Possibly a little more advance may help. Have you rechecked the valve timing? If some other components have come loose maybe so has  part of the valve system. What does the compression feel like, is it 'bouncy'? If you flick the flywheel round by hand does it bounce back from the compression.
Title: Re: another Snow engine
Post by: Rustkolector on July 31, 2017, 04:14:13 AM
Achim,
The Enya 09 carburetor should work. Doug Kelley had good success with this carb, and I did also. I have tried a number of other carbs and found that the smaller they are the better they work on the Snow. I currently use a 3 mm throttle carb now with good results. When attempting to start your Snow make sure the carb throttle setting is near closed. Enough so that the intake air makes a slight hissing sound when cranking. Start with the carb needle valve near closed and slowly open a click at a time while cranking and you should quickly find the setting you need to start.

Jeff
Title: Re: another Snow engine
Post by: fumopuc on August 01, 2017, 12:26:40 PM
More progress  :ThumbsUp:  :ThumbsUp:  A fairly simple carburettor should allow to run at some fixed speed, the problem may be somewhere else. Have you rechecked the ignition timing? Possibly a little more advance may help. Have you rechecked the valve timing? If some other components have come loose maybe so has  part of the valve system. What does the compression feel like, is it 'bouncy'? If you flick the flywheel round by hand does it bounce back from the compression.
Hi Roger, thanks for your thoughts and comments.
Ignition timing rechecked, 8° in advance as recommended. 18° in advance was tested also.
Valve timimg rechecked, starting to open exhaust valve 25° BBDC as recommended.
I will recheck the compression again at each cylinder, I do have this bouncy feeling and all 4 combustion chambers do have the same heating after some driven use of the engine.
May by all 4 are bad ?
Title: Re: another Snow engine
Post by: fumopuc on August 01, 2017, 12:39:22 PM
Achim,
The Enya 09 carburetor should work. Doug Kelley had good success with this carb, and I did also. I have tried a number of other carbs and found that the smaller they are the better they work on the Snow. I currently use a 3 mm throttle carb now with good results. When attempting to start your Snow make sure the carb throttle setting is near closed. Enough so that the intake air makes a slight hissing sound when cranking. Start with the carb needle valve near closed and slowly open a click at a time while cranking and you should quickly find the setting you need to start.

Jeff
Jeff thank you so much for your suggestions. Very good to know that the same basic hardware configuration is working at other places.
This will lead me to another direction I have been until now.
Currently my needle is open by a 3/4 to 1 turn and it fires only if the throttle is nearly full open.
I will try this more sensitive click by click method.
Title: Re: another Snow engine
Post by: Roger B on August 01, 2017, 01:27:20 PM
"Valve timimg rechecked, starting to open exhaust valve 25° BBDC as recommended"

Hi Achim,

Have you checked the complete cycle for inlet and exhaust? The exhaust should close slightly after TDC. The inlet should open slightly before TDC and close a little after BDC. The overlap period at TDC is probably more important than positions around BDC.
Title: Re: another Snow engine
Post by: fumopuc on August 02, 2017, 07:45:08 AM
Hi Roger, I will check the complete circle as you have mentioned.
To be honest I never put Dougs recommendation into question, because it should be a proven system.
Two rockers, one for exhaust the other for inlet, both running on the same CAM, does not give a lot of range.
Title: Re: another Snow engine
Post by: fumopuc on August 02, 2017, 07:48:11 AM
Achim,
The Enya 09 carburetor should work. Doug Kelley had good success with this carb, and I did also. I have tried a number of other carbs and found that the smaller they are the better they work on the Snow. I currently use a 3 mm throttle carb now with good results. When attempting to start your Snow make sure the carb throttle setting is near closed. Enough so that the intake air makes a slight hissing sound when cranking. Start with the carb needle valve near closed and slowly open a click at a time while cranking and you should quickly find the setting you need to start.

Jeff
Jeff thank you so much for your suggestions. Very good to know that the same basic hardware configuration is working at other places.
This will lead me to another direction I have been until now.
Currently my needle is open by a 3/4 to 1 turn and it fires only if the throttle is nearly full open.
I will try this more sensitive click by click method.

Hi Jeff, another question about the ENYA carburator set up, is there any known prefered adjustment for the idle speed needle available ?
Title: Re: another Snow engine
Post by: fumopuc on August 20, 2017, 07:51:19 AM
Hi Jeff, many thanks for your advice.
After checking the timing again, was something of 40° instead of 25° BBDC, I am getting some more pops.
I have tried a more precise method for the measurement of the valve movement this time.
cZaQvjBE3VIBut I am still fighting to get it to a real run.
Title: Re: another Snow engine
Post by: vcutajar on August 20, 2017, 12:16:18 PM
Thanks for the update Achim.

I feel your pain.

Vince
Title: Re: another Snow engine
Post by: sco on August 20, 2017, 12:26:27 PM
Seems so close to running properly - could you relieve the compression somehow and run it in on the drill to bed everything in?

Simon.
Title: Re: another Snow engine
Post by: fumopuc on August 20, 2017, 01:15:01 PM
Vince, thanks.


Simon, I believe there is still an issue with the mixture control.
In the mean time I have made a 3 mm air restrictor for the carburettor.
I have earned 5 to 8 seconds more runtime.
Another one with a 2 mm hole is also made now, but unfortunately the battery of the screw driller is still at the charger. 
Title: Re: another Snow engine
Post by: Kim on August 20, 2017, 03:21:31 PM
Achim, I have no meaningful advice to offer, but it sure looks close to me!  You can hear it trying really hard to keep going...  I know you'll get there soon!

One question - what's beaker for there? Is there oil coming out of the exhaust?

The engine looks beautiful!
Kim
Title: Re: another Snow engine
Post by: fumopuc on August 20, 2017, 03:47:24 PM
Hi Kim, yes it is oil. I have started with Coleman fuel and MMO 50:1, so the exhaust pipe spews some oil and creates a little mess.
Thanks for watching.
Title: Re: another Snow engine
Post by: Chipmaster on August 20, 2017, 05:50:59 PM
Hello Achim, stay with it, don't despair.
Andy
Title: Re: another Snow engine
Post by: Rustkolector on August 21, 2017, 12:23:44 AM
Achim,
You are getting a lot more smoke than I would expect from a 50:1 camp fuel/MMO mix. This could be due to accumulated liquid fuel/oil in the intake manifold which creates a restriction to normal flow and symptoms similar those in your video. I would check the intake manifold for any accumulation. If you find any amount of liquid in there, you might want to build the dry log intake manifold that I mentioned in my "Improved Snow" post to see if it helps.

http://www.modelenginemaker.com/index.php/topic,7090.msg148157.html#msg148157

Also, with this much oil being ingested, the spark plugs will quickly foul. Keep them cleaned and set the spark gap at approx. .020". You are getting close!

Jeff
Title: Re: another Snow engine
Post by: zeeprogrammer on August 21, 2017, 12:40:13 AM
I'd been gone for a while and still catching up.

Very glad to see this. You are so close! No doubt you'll get it.  :ThumbsUp:
Title: Re: another Snow engine
Post by: fumopuc on August 21, 2017, 09:56:25 AM
Andy and Zee (Carl)  thanks for your encouragement, glad to know you are both still following.

Jeff, thanks for all your suggestions and comments I appreciate it very much.
Of course I have followed your post “Improved Snow” with interest already in May.
Main reason for the smoke, should be more my heavy lubrication during the last reassembling.
The very last fuel mixture I have made is 70:1, which is used in the second part of the video.
The intake manifold was empty, when I have done my last visual inspection.
I think next to do, is to get a clear picture about the compression of each cylinder.
I do not own a pressure drop gage similar this Snap On product https://store.snapon.com/Cylinder-Leakage-Tester-Tester-Cylinder-Leakage-P650761.aspx, what in my understanding, would be the right instrument for measurement.
Instead of this I will make a new adapter for the spark plug hole, ready to fit  a small air tube.
I have one compressor with a proper industrial pressure regulator, so a carefully pressurizing of each cylinder should be possible and the instrument for comparison should be my  sense of hearing.
I will let you know the result as soon as possible.

Any further suggestions are always welcome.
Title: Re: another Snow engine
Post by: Stuart on August 21, 2017, 10:15:19 AM
Hi
Regards testing the compression as you outlined that would be a blow by test and is normally done with a air line fitted with a small say 0.5mm restrictor , tee for the pressure gauge and an adapter for the spark plug or injector.

Now for the downside , the situation was a test on a full size Diesel engine v16 6.5 inch bore 9 inch stroke the Cat guys tried to do that very test , you could hear air leaking ,but the test returned result as good from the Cat manual  :shrug: as I was shift eng for the bank I asked them to repeat the test without the rig on the engine , guess what the gauge read the same , so the test gear was useless.

So take care with the readings they can fool you

A cylinder comp tester is a gauge ( say 300 psi would be ok for you) with a non return valve between the gauge and cylinder do say five comp strokes and take a reading

Great build been following along but I only post if I have something to offer

Before it’s asked we had 6 cat v16 engine for standby power for the computer centre each rated at 1000hp or 750kw continuous rating
Title: Re: another Snow engine
Post by: Nick_G on August 21, 2017, 10:28:17 AM
.
Bit of a random suggestion here.

I feel a little embarrassed at suggesting anything to someone who's skill level is far, far beyond my own.  :-[

OK - The engine the way I see it is basically 2 engines combined. Would it be possible to isolate the 2 halves from each other. (removing parts / blocking inlets etc.) and see if one of the sections can be made to run.? Well sort of run.! as there would be big holes in the combustion strokes (2 not 4)

Just an idea to perhaps isolate the issue to which half of the engine needs a tweak.

Nick
Title: Re: another Snow engine
Post by: Roger B on August 21, 2017, 05:56:07 PM
Hi Achim,

Can you put up a video of the valve gear moving when fully assembled? The ones I can see only show the lower (exhaust?) valve being operated. If you can show the piston rod movement as well even better  :) Single cam valve systems are very sensitive to valve clearance. I used to have Triumph Dolomite Sprint with this system  ::)
Title: Re: another Snow engine
Post by: Rustkolector on August 21, 2017, 07:05:04 PM
Achim,
I have never used an automotive compression tester or leak down tester on a model engine. They are not accurate due to the relatively small engine cylinder volume you are trying measure on a model engine. Model IC engines are relatively low compression by design, and I find if I have reasonable flywheel bounce back when rotating the crankshaft over compression and uniform bounce back between cylinders, that a model engine will run. The factors influencing this simple test are ring to cylinder fit, ring to piston side clearance, and valve and valve guide sealing. The first two factors are easy enough to accomplish with good machine practice and visual inspection. Valve sealing is more troublesome. In my opinion the best test for leaky model engine valves is an inexpensive hand vacuum pump made for bleeding automotive brake systems. If you can pump it down to 25" Hg and it leaks down slowly, the valve should be fine. If it leaks down quickly, it needs lapping. Always put grease or 90W oil on the valve guide to check only the valve seat seal. Cut very narrow valve seats in the valve cage. .010"-.015" wide is good.
Jeff
Title: Re: another Snow engine
Post by: fumopuc on August 22, 2017, 09:15:41 AM
Hi
Regards testing the compression as you outlined that would be a blow by test and is normally done with a air line fitted with a small say 0.5mm restrictor , tee for the pressure gauge and an adapter for the spark plug or injector.

Now for the downside , the situation was a test on a full size Diesel engine v16 6.5 inch bore 9 inch stroke the Cat guys tried to do that very test , you could hear air leaking ,but the test returned result as good from the Cat manual  :shrug: as I was shift eng for the bank I asked them to repeat the test without the rig on the engine , guess what the gauge read the same , so the test gear was useless.

So take care with the readings they can fool you

A cylinder comp tester is a gauge ( say 300 psi would be ok for you) with a non return valve between the gauge and cylinder do say five comp strokes and take a reading

Great build been following along but I only post if I have something to offer

Before it’s asked we had 6 cat v16 engine for standby power for the computer centre each rated at 1000hp or 750kw continuous rating
Hi Stuart, thanks for your thoughts and your experience with the CAT guys. The engine analyze process I know from the past is 
•   first you do the compressing test like you mentioned with a pressure gage and a non return valve in the line, because this can be done quick and easy if the gage with a tube and tapered rubber sealing has to pressed into the spark plug thread. If all cylinders behave equal, they are all good or implausible, all bad.
•   If one value is different than the other cylinders, than a leakage test with the above mentioned tester could help to let you know where the leakage is and how much it is.
I can also remember, that it was useful to repeat leakage test up to three times with always cranking the engine between.
After a quick search in the net last night, I have found a Chinese clone of the Snap On tester at ebay for EUR 29,34, so I could not resist to order it.
It was told the tester is already in Germany and will be delivered until end of this week.
If no other experience is known here  about testing a model engine with this leakage tester, so I thought I would be time to get some.
I will let you know about any result soon.

Title: Re: another Snow engine
Post by: fumopuc on August 22, 2017, 09:27:48 AM
.
Bit of a random suggestion here.

I feel a little embarrassed at suggesting anything to someone who's skill level is far, far beyond my own.  :-[

OK - The engine the way I see it is basically 2 engines combined. Would it be possible to isolate the 2 halves from each other. (removing parts / blocking inlets etc.) and see if one of the sections can be made to run.? Well sort of run.! as there would be big holes in the combustion strokes (2 not 4)

Just an idea to perhaps isolate the issue to which half of the engine needs a tweak.

Nick

Hi Nick, first of all I am not sure that we have a different skill level, but I am sure we are sharing the same hobby and this is the most important thing, so many thanks for your suggestion.
Theoretical it should be possible to split the engine in two halves, but it will be difficult to adjust the timing and ignition, so I would like to avoid this effort. It should be possible to detect the failure also without this method. I will let you know about the progress.
Title: Re: another Snow engine
Post by: fumopuc on August 22, 2017, 09:34:22 AM
Hi Achim,

Can you put up a video of the valve gear moving when fully assembled? The ones I can see only show the lower (exhaust?) valve being operated. If you can show the piston rod movement as well even better  :) Single cam valve systems are very sensitive to valve clearance. I used to have Triumph Dolomite Sprint with this system  ::)

Hi Roger, yes the video with the slowly driven engine shows the exhaust valve only. I will make a video of the full valve motion at the next opportunity.
The adjusted valve clearance here is 0,15 to 0,2 mm, normally you will get some setting after a some run time, but there was no real long run until today.

Title: Re: another Snow engine
Post by: fumopuc on August 22, 2017, 09:48:49 AM
Achim,
I have never used an automotive compression tester or leak down tester on a model engine. They are not accurate due to the relatively small engine cylinder volume you are trying measure on a model engine. Model IC engines are relatively low compression by design, and I find if I have reasonable flywheel bounce back when rotating the crankshaft over compression and uniform bounce back between cylinders, that a model engine will run. The factors influencing this simple test are ring to cylinder fit, ring to piston side clearance, and valve and valve guide sealing. The first two factors are easy enough to accomplish with good machine practice and visual inspection. Valve sealing is more troublesome. In my opinion the best test for leaky model engine valves is an inexpensive hand vacuum pump made for bleeding automotive brake systems. If you can pump it down to 25" Hg and it leaks down slowly, the valve should be fine. If it leaks down quickly, it needs lapping. Always put grease or 90W oil on the valve guide to check only the valve seat seal. Cut very narrow valve seats in the valve cage. .010"-.015" wide is good.
Jeff

Hi Jeff, good to know that you are still following and you are also sharing your thoughts.
With the valves I am nearly sure that this is sorted out, have at look at reply #401, please.
http://www.modelenginemaker.com/index.php/topic,4060.390.html
As mentioned above, I will try to get a better feeling about the relationship between the bouncing flywheel and a possible measured value with a leakage tester in combination with audible blow by, wherever it will be. So I will let you know immediately after this experiment was done.
Title: Re: another Snow engine
Post by: Rustkolector on August 22, 2017, 08:54:18 PM
Achim,
When my Snow was first running, Doug tested my compression using a small compression gauge he made up that had very little internal volume between the engine connection and the gauge. All my cylinders were about 22-24 psi. His were a bit higher, but had more run hours. I was very disappointed. However, when the flywheel was spun by hand, the flywheel would stop on compression and rock backwards noticeably. The engine would start by hand and run well so I never paid much attention to compression readings since. I will agree that this is by no means a definitive test of cylinder compression. It is more a GO - NO GO test for slow speed heavy flywheel engines like the Snow.

I read your post regarding valve sealing. I make my valves by brazing SS heads on what we call "drill rod". The drill rod is quite uniform in diameter and stem sealing is never a problem. The valve faces and valve seats are cut on the lathe using the same 45 degree compound angle setting and a pot chuck to hold the valve. I also bore before reaming the valve guide hole in the same setup. Concentricity is everything when it comes to valves. I have found that a very narrow valve seat ring is much easier to seal than a wide seat.

I usually assemble the valve and valve cage, add the valve spring assembly to hold the valve shut, and snap it open and closed a few times then vacuum test it. My own test standard for valves is to pump down to 25" Hg and time the pressure increase to 20" Hg. If it takes more than 5-7 seconds, it is probably a very good valve seat. I usually go for 10 seconds. Many valves will go for 30 seconds, or more. In all fairness, I think my standard is more than is probably needed for a good running engine, but good sealing valves are a great asset to have when attempting to start a model engine. 
Jeff
Title: Re: another Snow engine
Post by: 90LX_Notch on August 22, 2017, 11:31:38 PM
Stay with it Achim.  I look forward to watching it run once you sort it out.


-Bob
Title: Re: another Snow engine
Post by: b.lindsey on August 23, 2017, 01:24:37 AM
It looks like you are very close Achim. Stay with it and you will have it running soon and be doing the happy dance!!

Bill
Title: Re: another Snow engine
Post by: fumopuc on September 03, 2017, 02:17:58 PM
R&D department, section failure analysis, has been busy and has to announce new results.

This was also the opportunity, to make the, since long time scheduled, pressurised air supply to my working place at the window.
Now I was able to pressurize each cylinder with 2,5 bar (35 psi). Starting with the cylinders from the fly wheel side, there was nothing unusual.
No noises could be head when the valves are closed. If the valves started to open, than the air could be heard clearly in the exhaust or inlet manifold.
The other two cylinders are a bit different. It does not matter which side is pressurized, there is always a kind of blow by in the other spark plug hole noticeable.
It can be heard already from the beginning of the video. To make it more clear, I tried to record the noise in the second part by interrupting the air supply.
D_fm1Jo7GpMMy very first assumption is, this is caused by the earlier failure with the loose piston in this cylinder,see reply #601.
It could be, that during my starting attempts with the piston rod moving into the piston, instead of moving the piston in the cylinder, I have created some wear and the connection piston rod to piston is not sealed any more.
So another disassembly of this cylinder will be necessary. May be some epoxy glue or JB Weld will help to close the very small gap.
On the left side are also some bubbles between cylinder and cylinder head visible, but this is not a big mess.
Title: Re: another Snow engine
Post by: Roger B on September 03, 2017, 04:36:37 PM
A leak like that will certainly reduce the output from that cylinder group  :( Hopefully the problem/damage is not too serious  :ThumbsUp:  :ThumbsUp:
Title: Re: another Snow engine
Post by: Art K on September 03, 2017, 07:40:05 PM
Achim,
I just caught up on your trials & tribulations with your Snow engine. I hope you get things sorted out without to much trouble. I think I'll pass on this as my first multi cylinder engine.  :)
Art
Title: Re: another Snow engine
Post by: fumopuc on March 24, 2019, 01:23:31 PM
Hi everybody,
the last picture from 2017 and the last attached one are very similar, showing nearly the same mess at the same place.
The big different, the attached one is from today and yes I have attacked the Snow engine again.
Some weeks ago I have received a friendly e-mai from Jeff (Rustkolector) where he offered some help by reporting about all his long and intensive research and development work with his Snow engine. One important recommendation was to make new cams with 46° angle. The rear one at the CAD picture, front one is the original like the drawing.
I have given the order to Fusion360 and the CNC millling machine.
Title: Re: another Snow engine
Post by: fumopuc on March 24, 2019, 01:37:32 PM
Today was the day of a proper new adjusting of the timing and ignition again.
Some fuel was loaded and after a quick moment my Snow engine was running like a clockwork.
I was so surprised about the smooth running, that I totally forgot that there was no cooling.
So after some watching of the very smooth and slowly motion I had to stop the engine and to fill up the coolant first time.
That ends in a wet mess, but nothing what not could be sealed quickly.
I have had some successfully runnings, but when I have started to make a video, that was unfortunately the moment when the middle connection between the piston rod came loose, which I assume was followed be a loose piston also.
So ignore the strange sound in the video, that will be another issue to fix now.
uPzzU0yKeP8

Jeff (RUSTKOLECTOR) thank you very much.


 
Title: Re: another Snow engine
Post by: vcutajar on March 24, 2019, 08:45:10 PM
Great progress Achim. :ThumbsUp: :ThumbsUp:

Vince
Title: Re: another Snow engine
Post by: Admiral_dk on March 24, 2019, 09:12:12 PM
It is fantastic that after all your work on that engine, it finally is beginning to run as it should - really hope that you solve the last bits too Achim  :cheers:

Title: Re: another Snow engine
Post by: Art K on March 24, 2019, 10:05:13 PM
Achim,
Sounds like a good run. Just a little more sorting out. :cartwheel: Time for the happy dance.
Art
Title: Re: another Snow engine
Post by: fumopuc on March 25, 2019, 03:15:35 AM
Vince, Per, Art thank you for watching and the friendly words.
Indeed it was such a good feeling to see and hear the engine running that way.
Title: Re: another Snow engine
Post by: Kim on March 25, 2019, 04:29:31 AM
Achim, that is so exciting to see your snow run!  Really neat to watch!
Kim
Title: Re: another Snow engine
Post by: MJM460 on March 25, 2019, 06:18:50 AM
Hi Achim, great to see you back on the Snow, it is a very interesting looking engine.  Congratulations on getting it running so well. 

Just a final mechanical issue now. 

MJM460

Title: Re: another Snow engine
Post by: cwelkie on March 25, 2019, 12:46:59 PM
Your perseverance is paying off Achim!  I'm happy for you and the positive result.
Charlie
Title: Re: another Snow engine
Post by: b.lindsey on March 25, 2019, 12:48:14 PM
Just saw the latest video Achim. Very very nice and looks to be running well now.

Bill
Title: Re: another Snow engine
Post by: fumopuc on March 25, 2019, 05:02:05 PM
Kim, MJM460, Charlie and Bill, thanks for watching and giving friendly comments.
It was really a great feeling to see the ongoing motion after such a long time, starting with the first swarf in Juli 2014.
On the other side, I am also very  happy to be part of this MEM community, where a Lady and some Gentlemen are always prepared to offer some very useful help.
Title: Re: another Snow engine
Post by: scc on March 25, 2019, 09:12:52 PM
Excellent progress Achim,  It certainly is an intriguing engine to watch running.  Well Done :ThumbsUp:                Regards       Terry
Title: Re: another Snow engine
Post by: scc on March 25, 2019, 10:03:15 PM
I have had to go to the start of this build and catch up.  My word :o there is a LOT of work in this engine , and all very technical too. I'm blown away with all your added details. An outstanding build. :praise2: :praise2:

Terry
Title: Re: another Snow engine
Post by: d.williams on March 27, 2019, 05:09:30 AM
Hello Achim. I have spent the last three evenings enjoying every word, photo, video, and reader's coments on your most interesting and beautifully executed example of the Snow engine. Thank you for sharing this journey with all of us. I can only dream that some day I might achieve a success that perhaps would just begin to approach what you have accomplished. Your craftsmanship and creativity are an inspiration to me and I'm sure to many others as well. I will continue to follow your progress as you complete this wonderful creation.

Many thanks,
Don Williams
Title: Re: another Snow engine
Post by: kvom on March 27, 2019, 05:37:48 PM
I love seeing these engines, esp. those that run.  I haven't seen a real one running, but the Cooper at Rough and Tumble in PA is quite close.
Title: Re: another Snow engine
Post by: crueby on March 27, 2019, 06:30:39 PM
Very nice! Brings back memories of watching the real one at the Coolspring show running a few years ago, have to get back there again...
Title: Re: another Snow engine
Post by: Chipmaster on March 27, 2019, 07:47:54 PM
Impressive  :ThumbsUp:
Andy
Title: Re: another Snow engine
Post by: flopearedmule on March 28, 2019, 01:41:01 AM
Very nice build!  I'm happy for you getting it running and sounds great!
Title: Re: another Snow engine
Post by: Tjark on March 28, 2019, 07:56:22 AM
Achim, nice to see you back at the Snow.
You made good progress to.
Wil be a smooth runner.


      Tjark.
Title: Re: another Snow engine
Post by: Roger B on March 28, 2019, 01:14:12 PM
Excellent  :praise2:  :praise2:  :wine1:

It's interesting how much difference the cams made on this engine. Were you able to model or measure the actual valve timing before and after?
Title: Re: another Snow engine
Post by: fumopuc on March 28, 2019, 01:53:22 PM

Dear Gentlemen,
first of all thank you so much for your time to watch and giving friendly words and comments.
I do appreciate this very much and it is really a big fun and pleasure to be part of this community here.

Excellent  :praise2: :praise2: :wine1:

It's interesting how much difference the cams made on this engine. Were you able to model or measure the actual valve timing before and after?


Hi Roger,
I have measured the timing situation before swapping the cams.
The original drawing / set up instruction says, outlet beginning opening 25° before BDC with the original 58° cams.
I have measured two times 25° degrees and two times 30/31° degrees.
If I remember well, than I could measure during my last attempts in autumn 2017  at this combustion chambers with 30° a higher temperature.
The recommendation from Jeff was to adjust 40° before BDC with 46° cams.
That seems to be the magic difference.
Title: Re: another Snow engine
Post by: fumopuc on March 31, 2019, 04:13:46 PM
Hi everybody,
spring in Munich, Germany and 18°C outside.
So a good opportunity for some R&D work in front of the open window.
Something what could be nearly called a "long run".
QlKs3LPhU3c
Title: Re: another Snow engine
Post by: Dave Otto on March 31, 2019, 04:24:58 PM
That sounds and runs great Achim!
What a beautiful engine and display.

Dave
Title: Re: another Snow engine
Post by: crueby on March 31, 2019, 05:13:20 PM
That is running wonderfully! Congratulations!!
Title: Re: another Snow engine
Post by: sco on March 31, 2019, 05:59:33 PM
Seems like that is just purring nicely - you must be pleased with how it looks and runs!

Simon.
Title: Re: another Snow engine
Post by: Kim on March 31, 2019, 06:06:25 PM
Wonderful Achim!  Seems you've got it dialled in now!   :ThumbsUp:
Kim
Title: Re: another Snow engine
Post by: rudydubya on March 31, 2019, 08:16:31 PM
Wonderful work, Achim.  Sounds great.

Regards,
Rudy
Title: Re: another Snow engine
Post by: vcutajar on March 31, 2019, 08:26:49 PM
Congratulations.  :praise2: Lovely runner Achim.  :praise2:

Vince
Title: Re: another Snow engine
Post by: Admiral_dk on March 31, 2019, 09:31:25 PM
Wonderful - it looks and sounds the part too  :cheers:
Title: Re: another Snow engine
Post by: MJM460 on March 31, 2019, 10:39:24 PM
Congratulations Achim, a great result for so much beautiful work.

MJM460
Title: Re: another Snow engine
Post by: Don1966 on April 01, 2019, 12:15:44 AM
Awesome Achim and I bet your aesthetic. She’s a nice runner and sounds great!.....did I say .......I........like........  :Love:



  :drinking-41:
Don
Title: Re: another Snow engine
Post by: cwelkie on April 01, 2019, 12:32:05 AM
Congratulations Achim!
Another beautiful build from your workshop.
Charlie