Author Topic: Old Style Oscillator  (Read 10732 times)

Offline Jasonb

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Old Style Oscillator
« on: December 24, 2017, 04:08:57 PM »
Some of you may have seen the thread discussing the pivot details of an old oscillating engien that I was thinking of building

http://www.modelenginemaker.com/index.php/topic,7715.0.html

Well I've made a start. I'm just going to put up the odd photo as the bits are done then when I know everything works will do a more detailed build together with drawings.

Sole Plate


Offline b.lindsey

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Re: Old Style Oscillator
« Reply #1 on: December 24, 2017, 07:27:24 PM »
Nice start Jason. You have been busy these last few days. Are you also putting that new Mill through it's paces?

Bill

Offline Jasonb

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Re: Old Style Oscillator
« Reply #2 on: December 24, 2017, 07:51:22 PM »
Bill I did use the new mill for some of it, the main reason being that the table is about 5" lower than my X3 and the switches are also easier to reach when sitting as my back is playing up so I can't stand for long. Also tried out the 6" rotary table, being 72:1 rather than the usual 90:1 it is quiet nice for rounding parts as you don't have to crank the handle quite so many times. 12mm Carbide 2-flute cutter with aluminium specific geometry chomped through the 14mm thick plate at 1800rpm.





J


Online Dave Otto

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Re: Old Style Oscillator
« Reply #3 on: December 24, 2017, 11:30:06 PM »
Nice start Jason, I'm looking forward to seeing more of this one.

Dave

Offline Jasonb

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Re: Old Style Oscillator
« Reply #4 on: December 26, 2017, 06:50:24 PM »
Bit more done today, not quite as much as I had hoped for but it is progressing. maybe if I had not stopped to watch the latest round of the Cyclocross World Cup that was live streaming I would have had the bearings done too :thinking:


Offline b.lindsey

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Re: Old Style Oscillator
« Reply #5 on: December 26, 2017, 07:47:20 PM »
Yeah but that is still some nice progress. Looking good too!!

Bill

Offline Jasonb

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Re: Old Style Oscillator
« Reply #6 on: December 27, 2017, 05:03:59 PM »
Today I partly reworked the bearing caps as I was not happy with the way the looked and have also added bosses under the fixings rather than the counterbores I had originally drawn. Also made the bearings and got the crankshaft together, when the Loctite has set I will cut out the middle of the main shaft and file the ends flush.


Offline b.lindsey

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Re: Old Style Oscillator
« Reply #7 on: December 27, 2017, 06:00:19 PM »
Will you pin the joints as well Jason or rely just on the Loctite?

Bill

Offline Jasonb

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Re: Old Style Oscillator
« Reply #8 on: December 27, 2017, 06:19:11 PM »
Bill, on these little ones that won't really be expected to do any work I just use Loctite on its own.

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #9 on: December 27, 2017, 07:03:22 PM »
Looks great Jason   :)

Are the bearing block sides a circular profile?  They look like an elliptical shape so I was wondering how you managed to cut the curve  :headscratch:

Offline Jasonb

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Re: Old Style Oscillator
« Reply #10 on: December 27, 2017, 07:09:03 PM »
There is a short straight vertical section down to the center line of the bearing and from there it is a 40mm radius but as the C/L of the bearing is only 25mm tall you only get part of the circle making up the side.


Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #11 on: December 27, 2017, 07:22:33 PM »
Thanks I see it now.

It makes for an attractive profile.

Offline Jasonb

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Re: Old Style Oscillator
« Reply #12 on: December 28, 2017, 04:43:32 PM »
I started off by machining the two flywheels this morning. You hear a lot of people saying recent Stuart castings are not as good as the old ones but these two were very good, little flash between the spokes which tool less than 5mins each to fettle with a couple of files and near zero mould shift between the two halves. Ran true in the 3 jaw and went from tool just touching surface to cleaned up with a single 15thou cut on both sides and face of the rim. Bored out the 8.0mm hole for a firm fit on the shaft which was tighter and truer than if I had used a reamer.

Then set to and made the various bits that will make up the cylinder "casting" I will leave soldering that until the morning.



J


Online Jo

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Re: Old Style Oscillator
« Reply #13 on: December 28, 2017, 05:47:31 PM »
The Bridgenorth Stuart castings are very good, it was the dregs from the previous foundry that left a bit to be desired  ::)

That looks very Brassy. Are you not worried with the Ali base that the engine is going to jump around a bit when it gets swinging around?  :thinking:

Jo
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Online crueby

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Re: Old Style Oscillator
« Reply #14 on: December 28, 2017, 06:32:38 PM »
The Bridgenorth Stuart castings are very good, it was the dregs from the previous foundry that left a bit to be desired  ::)

That looks very Brassy. Are you not worried with the Ali base that the engine is going to jump around a bit when it gets swinging around?  :thinking:

Jo
How do you know when ordering castings if you are getting the ones from the new or old foundry? Did they use up or toss the old stock?

And for the base, wouldn't it be fine once bolted down on a display base?

 :popcorn:

Offline Jasonb

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Re: Old Style Oscillator
« Reply #15 on: December 28, 2017, 06:34:45 PM »
Bridgenorth? where is that, these ones came from Bridport. ;)

Should not jump about too much, that is why it has a counterbalanced crank just like the old one, combined with an ali piston I don't see it being an issue. Though if i did not run it then jumping about would not come into it :LittleDevil:

Online Jo

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Re: Old Style Oscillator
« Reply #16 on: December 28, 2017, 06:48:30 PM »
Bridgenorth? where is that, these ones came from Bridport. ;)

End of the Severn valley Railway: It has a very nice cliff Railway and some excellent pubs :DrinkPint: Martin and I were discussing them the other night  ::)

Yes Bridport Foundry  :facepalm: .. but the stuff they have cast themselves is excellent quality. Early on they were selling the old Channel Island stuff that was not of the same quality.

Jo
Usus est optimum magister

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #17 on: December 28, 2017, 07:52:53 PM »
It's an attractive little engine, do you know if it is based on a full size working engine ?

Offline Jasonb

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Re: Old Style Oscillator
« Reply #18 on: December 28, 2017, 08:37:05 PM »
I suppose the one in the other thread ma have been used as a very small "workshop" engine but as it is of such a simple design I have my doubts.

Should be quite attractive when complete, not sure what colour I will go with, maybe a similar green to the original or possibly something else, quite fancy a cream but more yellower than what I used one the Muncaster which should set off the wood lagging quite nicely.

J

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #19 on: December 28, 2017, 08:56:14 PM »
I quite like the look of little ocillators.

I guess when you make a lot of engines you start to run out of new colours, it seems like once you exhaust the green, black, red and blue there isn't must else left ;-)

Offline philjoe5

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Re: Old Style Oscillator
« Reply #20 on: December 28, 2017, 10:14:10 PM »
Well there might be others  :cartwheel:

Phil
If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.  - Mark Twain

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #21 on: December 28, 2017, 10:15:47 PM »
You ought to link them up as a throaty V10  ;)

Online crueby

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Re: Old Style Oscillator
« Reply #22 on: December 28, 2017, 10:16:07 PM »
Well there might be others  :cartwheel:

Phil

Thats what happens when you feed the engines after midnight, they start to breed!

 :ROFL:

Offline Jasonb

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Re: Old Style Oscillator
« Reply #23 on: December 29, 2017, 04:55:22 PM »
The last complicated bit of work on the cylinder was sticking it all together with a few blobs of Silver solder which went quite well and I'm liking the new Sievert torch that Santa gave me. Half hour in the pickle had it looking clean even if the bronze was a bit pink



That left me with what was essentially a simple cylinder  "casting" that could be treated like any other and machined on the surfaces that matter followed by poking some holes in where needed.



Cylinder end covers next I think.

J

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #24 on: December 29, 2017, 05:26:52 PM »
I like that cylinder fabrication, it looks just like a casting  :)

Is it entirely bronze ? I've never worked with bronze but presumably it silver solders well ?

Online crueby

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Re: Old Style Oscillator
« Reply #25 on: December 29, 2017, 05:39:49 PM »
That came out excellent!  How did you hold the parts to the main body for soldering? Are there pins or screws?

Offline Jasonb

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Re: Old Style Oscillator
« Reply #26 on: December 29, 2017, 05:43:41 PM »
The two end flanges are brass and so is the rectangular bar that has the steam passages milled into it. Main cylinder was cut from hollow SA660 bronze, cross rod that forms the pivot from the same and the valve block from LB4 which is another leaded bronze. But it all solders up very easily and is nice to machine being harder than the typical gun metal castings you get.

Stood it on end to solder so gravity kept the two end flanges in place, cross rod located and took the weight of the valve block and I just put a twist of wire around it to hole in place

Online Jo

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Re: Old Style Oscillator
« Reply #27 on: December 29, 2017, 06:13:30 PM »
Is that a casting flaw on it?

Jo
Usus est optimum magister

Offline Jasonb

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Re: Old Style Oscillator
« Reply #28 on: December 29, 2017, 06:20:12 PM »
Well you have got to make them look authentic ;)

Offline b.lindsey

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Re: Old Style Oscillator
« Reply #29 on: December 29, 2017, 07:26:49 PM »
That turned out very well Jason!  At this speed, should be running in a few days.

Bill

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Re: Old Style Oscillator
« Reply #30 on: December 29, 2017, 08:22:54 PM »
Well you have got to make them look authentic ;)

You can always hide it with some JB Weld  ::)

Jo
Usus est optimum magister

Online crueby

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Re: Old Style Oscillator
« Reply #31 on: December 29, 2017, 08:25:53 PM »
Well you have got to make them look authentic ;)

You can always hide it with some JB Weld  ::)

Jo

Just put a label over the tube, 'Ye Olde Epoxye'   :Lol:

Offline Brian Rupnow

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Re: Old Style Oscillator
« Reply #32 on: December 29, 2017, 09:13:12 PM »
Jason--Beautiful work, as usual. I've not seen an oscillating engine like that one. All I have seen are the Verbourg style "wobblers".---Brian

Offline ChuckKey

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Re: Old Style Oscillator
« Reply #33 on: December 30, 2017, 12:21:06 AM »

How do you know when ordering castings if you are getting the ones from the new or old foundry? Did they use up or toss the old stock?


I can't remember which they told me, it was either a third or a half of the inherited casting stock that was scrapped.

Online Dave Otto

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Re: Old Style Oscillator
« Reply #34 on: December 30, 2017, 12:59:55 AM »
The cylinder turned out very nice Jason!

Dave

Offline Jasonb

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Re: Old Style Oscillator
« Reply #35 on: December 30, 2017, 04:24:38 PM »
Rather than hide the wayward spot drill hole with JBWeld I decided it would be better off covered up with a bit of cast iron so knocked up the cylinder covers and piston rod gland. I think I will amend my drawings to make the gland flange 1.0mm larger in dia as the holes look a bit close to the edge, good job I have got small nuts.



Piston is also done but just needs skimming to final dia once mounted on the piston rod and some of the studs are also made. I did also do some painting on the Horizontal R&V engine too.

Offline MJM460

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Re: Old Style Oscillator
« Reply #36 on: December 31, 2017, 01:56:29 AM »
Hi Jason, I thought that small spot was deliberate, as a relief landing for the jacking bolts!  Well, perhaps you were coming back to flatten the bottom.

I like the fabrication, how big is that torch?  I would like to try that.

Did you say the rod for the pivot points goes right through?  So it gets cut out when you bore the cylinder to size.   Great way to get. It all lined up.

Thanks for documenting it all so well, very instructive for novice machinists like me.  It is a nice little model.

MJM460
The more I learn, the more I find that I still have to learn!

Offline Jasonb

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Re: Old Style Oscillator
« Reply #37 on: December 31, 2017, 07:28:28 AM »
The smaller of the two spigots on the valve side will just pivot in the valve upright, the larger one on the opposite side will take the pointed adjustment screw and pivot on that.

I spent a while going through various ways to decide how best to hold the work and get the two pivots at right angles to the cylinder and came up with the idea of a well fitted shaft passing right through. I sawed away most of the bar before final boring then just used a collet to drive it while supported at the other end with the tailstock, I drilled ctr holes before soldering.



I got The torch as a kit which worked out quite reasonably for Santa, Hamilton Gas do about the best prices

http://img.photobucket.com/albums/v156/jasonballamy/Engineering/Oscillator/DSC02392_zpsy9qfq1ps.jpg

It is the Pro 3486 handle, 3511 neck Tube and 2941 burner that is 28mm dia and puts out 7.7KW plus hose and 4 bar regulator.

https://gasproducts.co.uk/gas-blow-torches/sievert-torch-handles-and-burners.html?p=1

Offline MJM460

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Re: Old Style Oscillator
« Reply #38 on: December 31, 2017, 09:07:09 AM »
Thanks Jason, an ingenious method to achieve a very tricky lineup.

That burner selection gives a good idea of just how much heat is required for such a fabrication.  Good to see that it can be done without oxy.

MJM460
The more I learn, the more I find that I still have to learn!

Offline Jasonb

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Re: Old Style Oscillator
« Reply #39 on: December 31, 2017, 04:22:35 PM »
Started off today by making the piston rod which allowed me to mount the piston onto it for final machining. Had a quick test to see how things were working out, not too bad as there are no rings, gland packing , gaskets or even an oil film.


Then made the big end and finished off the cylinder studs, piston rod is a bit over length at the moment a sit is easier to take some off on final assembly than to put it back on. Starting to look like an engine now.


Online crueby

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Re: Old Style Oscillator
« Reply #40 on: December 31, 2017, 04:29:58 PM »
Nice! That is going to be a beaut!

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #41 on: December 31, 2017, 04:37:13 PM »
Looking great Jason  :)

I'm a tad confused about the pivots though  :headscratch:  are you saying the pivot passed right through the cylinder bore which was later rebored ?  I think I'm misunderstanding something here  :facepalm:

Offline Jasonb

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Re: Old Style Oscillator
« Reply #42 on: December 31, 2017, 04:56:35 PM »
These are the bits before soldering, cylinder is over length and 2mm under bore, flanges 1mm over dia and 0.5mm over thickness, valve block has about 1.0mm to come off the face and the round bar passes right through and is also over diameter.



If I had just soldered separate pivots onto either side it would have been a lot harder to make sure they were dead opposite each other and at right angles to the bore. The bar had the middle sawn out after soldering and then the cylinder was bored out to finished size and flanges faced.
« Last Edit: December 31, 2017, 05:00:48 PM by Jasonb »

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #43 on: December 31, 2017, 05:01:41 PM »
Ah ok thanks  :)

The photos on 29/12/17 showing the pivots already in place threw me a bit.

It going to be an attractive little engine.

Offline b.lindsey

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Re: Old Style Oscillator
« Reply #44 on: December 31, 2017, 05:03:44 PM »
Amazing progress Jason. Nice setup on getting the pivots in line too.

Bill

Offline Kim

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Re: Old Style Oscillator
« Reply #45 on: December 31, 2017, 06:16:13 PM »
That's really neat how you did that, Jason.
Kim

Offline Jasonb

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Re: Old Style Oscillator
« Reply #46 on: January 01, 2018, 04:27:59 PM »
 :pinkelephant: :cartwheel: :pinkelephant: :whoohoo:

Offline Jasonb

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Re: Old Style Oscillator
« Reply #47 on: January 01, 2018, 07:17:48 PM »
Well as you may have guessed from the above post New Year + New Runner = Happy

Spent a while doing the two pivot supports, the valve one is quite fiddly as there are a lot of small holes that all have to intersect and not go deeper than they should. There is still a bit of shaping left to be done and two of the drilled passages need blanking off properly but I could not resist giving it a go. so knocked up a temporary pivot screw and quickly assembled it still no gaskets, rings or gland packing and tried a bit of air through it. Started straight away with the lightest of flicks to the flywheel.

Will get the last couple of bits done and then slap some paint on it hopefully all by the weekend, in the mean time here is a quick video.


Online crueby

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Re: Old Style Oscillator
« Reply #48 on: January 01, 2018, 07:31:30 PM »
Wow, I didn't realize that you were so close to a test run!  Excellent!!!


 :pinkelephant:    :cartwheel:

Offline b.lindsey

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Re: Old Style Oscillator
« Reply #49 on: January 01, 2018, 07:36:53 PM »
Very nice Jason, and with the final touches it should run even better, but it looks great and runs smoothly even now.  :ThumbsUp:

Bill

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #50 on: January 01, 2018, 08:12:37 PM »
Nice one, great to see it running.

I want one  :)

Online Jo

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Re: Old Style Oscillator
« Reply #51 on: January 01, 2018, 08:24:35 PM »
Seeing that run that has confirmed a couple of my thoughts on the replica engine that you knew I have been planning to build  :thinking:

Spent a while doing the two pivot supports, the valve one is quite fiddly as there are a lot of small holes that all have to intersect and not go deeper than they should.

So why did you change from Munchaster's original design for the port block it is really simple to machine  :noidea:

Jo
« Last Edit: January 01, 2018, 08:27:44 PM by Jo »
Usus est optimum magister

Offline Jasonb

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Re: Old Style Oscillator
« Reply #52 on: January 01, 2018, 09:06:52 PM »
I've not seen Muncaster's original design except from the outside (assuming the one in the photo was Muncaster's) and that was after I had already drawn it up.

Online Dave Otto

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Re: Old Style Oscillator
« Reply #53 on: January 02, 2018, 02:24:49 AM »
Congrats on a runner Jason!

I guess it really doesn’t matter to me who designed the port block.  :lolb: She runs pretty nice.
With some gaskets and running in, it is bound to get even better.

Dave

Offline Jasonb

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Re: Old Style Oscillator
« Reply #54 on: January 02, 2018, 08:00:20 AM »
So Jo does that mean that you have found the Muncaster drawings?

Just found another photos that I have had for a couple of years which I had been looking for, it was not in my usual "future projects" file but just in a PB album so one I have fancied doing for a couple of years as it was taken early 2016 at AP when it was on the Northern Assoc of MEs stand. Mine is not an exact replica just an engine in the same style

You can just see a couple of brass plugs in the valve support which suggests it uses the circular groove with pins to divide the groove into two sections Exhaust and inlet. I opted for two horizontal holes which has the advantage of less "open" area on teh port faces for air/steam to escape as you only have two small slots letting air out rather than a half round groove.


Online Jo

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Re: Old Style Oscillator
« Reply #55 on: January 02, 2018, 08:30:14 AM »
So Jo does that mean that you have found the Muncaster drawings?

Julius redrew the drawings for the Munchaster Vertical oscillator engine for us some time go  8) I am sure you also have the Westbury update from back in 1957 http://www.replicaplans.com/MuncasterModelEngines/muncaster-02.pdf

Yes, the two brass plugs on the engine match the original Munchaster design of the single circular slot plugged on either side with those brass plugs. The port being open to the pressure for a slightly longer angular duration smooths the power output of the engine  :).

Jo
Usus est optimum magister

Offline Jasonb

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Re: Old Style Oscillator
« Reply #56 on: January 02, 2018, 10:14:37 AM »
I though Julius only did his version a couple of months ago at the most. Though I did buy the Muncaster book That Westbury's drawing was taken from when is was 19 or 20 so have had it for some time :-[. It was not until you mentioned the engine was also one of Muncasters that I had thought about it and only noticed the pins when I saw my photo this morning.




Offline Jasonb

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Re: Old Style Oscillator
« Reply #57 on: January 05, 2018, 04:17:43 PM »
Well a couple of days doing the last few little bits to make it look nice plus a lick of paint and that is this one done and dusted.













As you can see I went with the creamy yellow which is in fact U-POL HIGH5 high build primer filler topped off with a clear gloss lacquer. I also kept the wood cleading fairly light too.

A bit of a vid of it running, I did give it some beans at the beginning but despite Jo's worries it shows no signs of jumping about even before I put it onto the wooden base. These 24mm bore engines are quite a nice size - not too small that they become fiddly and not too large that you need to spend a lot on materials or need a big compressor to run them. At a steady speed it will run for about 3mins before the compressor trips in or if I switch it off I can get about 7mins before the tank is too low.



Online crueby

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Re: Old Style Oscillator
« Reply #58 on: January 05, 2018, 04:23:07 PM »
That is just wonderful!!

 :ThumbsUp:

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #59 on: January 05, 2018, 04:39:16 PM »
Looks and runs great  :)


Online Jo

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Re: Old Style Oscillator
« Reply #60 on: January 05, 2018, 04:59:20 PM »
It looks distinctly different to not be confused with Munchaster's original engine. I am guessing that is a 150mm long engine with 100mm flywheels.

Pleased to see you are beginning to use metric measurements  :ThumbsUp:

Jo
Usus est optimum magister

Offline Jasonb

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Re: Old Style Oscillator
« Reply #61 on: January 05, 2018, 05:09:05 PM »
Bed plate is 150mm long but the flywheels are 76mm Stuart 10 series ones. 75mm would have been more in keeping with metric but I wanted to keep as much weight in the flywheels as possible.

Don't know what you mean "beginning" to use metric, this is the 5th in the "series 24" and all have been drawn and made in proper metric not imperial sizes expressed in metric, 4 aero engines also in metric.

Online Jo

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Re: Old Style Oscillator
« Reply #62 on: January 05, 2018, 05:13:25 PM »
 :headscratch: Does this mean you do all your redrawn engines with 24mm bores?


The original Munchaster engine is 8" long with 4" flywheels and 1" bore. Maybe you have mounted the crank in a different position on the base plate on your model as on the original the flywheels end level with the end of the curve on the base plate  :noidea:

Jo
Usus est optimum magister

Offline b.lindsey

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Re: Old Style Oscillator
« Reply #63 on: January 05, 2018, 05:20:42 PM »
Well it looks and runs great Jason and I fine the color very appealing too. Very nicely done!!!

Bill

Offline Jasonb

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Re: Old Style Oscillator
« Reply #64 on: January 05, 2018, 05:26:19 PM »
:headscratch: Does this mean you do all your redrawn engines with 24mm bores?


The original Munchaster engine is 8" long with 4" flywheels and 1" bore. Maybe you have mounted the crank in a different position on the base plate on your model as on the original the flywheels end level with the end of the curve on the base plate  :noidea:

Jo

No I have done them with 35mm, 16.3, 12, 22 and a few more that I can't be bothered to look up.

As I said before this engine was inspired by the one in the photos and is not meant to be an exact replica and I did not even know it was a Muncaster design until you mentioned it, the Cylinders are more like the ones I linked to that were on e-bay so it's not a redrawn engine as I have never seen the original drawings.

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #65 on: January 05, 2018, 05:44:50 PM »
What are the 'Series 24' ?

Offline Jasonb

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Re: Old Style Oscillator
« Reply #66 on: January 05, 2018, 05:48:22 PM »
All the ones I have done with a 24mm bore - Jowitt, Muncaster, Thompstone, CHUKY and this Oscillator. There are a few more part drawn up that will also have the same bore ;)

Offline Roger B

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Re: Old Style Oscillator
« Reply #67 on: January 05, 2018, 05:48:48 PM »
Excellent  :praise2:  :praise2: I have only just caught up with this thread and it's a runner  ::) I like your technique for keeping the pivots inline and true  :ThumbsUp:  :wine1:
Best regards

Roger

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #68 on: January 05, 2018, 05:53:57 PM »
All the ones I have done with a 24mm bore - Jowitt, Muncaster, Thompstone, CHUKY and this Oscillator. There are a few more part drawn up that will also have the same bore ;)

Are they a set of plans that you are intending to draw up for all comers to have a go at ?  Something the Stews 'Potty' series ?

Offline Jasonb

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Re: Old Style Oscillator
« Reply #69 on: January 05, 2018, 06:00:53 PM »
Yes Similar sort of thing, Jowitt and CHUKY drawings can be downloaded with links in the build thread and I'll probably do the same with this oscillator. Muncaster and Thompstone will go into ME mag and have drawings there.

Offline Gas_mantle

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Re: Old Style Oscillator
« Reply #70 on: January 05, 2018, 06:05:43 PM »
Sounds like an attractive series of relatively simple engines for beginners and people with limited tooling  :)

Offline Kim

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Re: Old Style Oscillator
« Reply #71 on: January 05, 2018, 06:54:29 PM »
Nice little engine Jason!  Very good looking and runs well!
Kim

Online Jo

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Re: Old Style Oscillator
« Reply #72 on: January 19, 2018, 08:17:57 PM »
Someone did me some more pics of the Big-Piggy  :whoohoo:

Jo
« Last Edit: January 19, 2018, 08:21:01 PM by Jo »
Usus est optimum magister

Offline gary.a.ayres

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Re: Old Style Oscillator
« Reply #73 on: August 08, 2018, 10:53:11 PM »
Lovely engine, and expertly built.

There's something very pleasing about oscillators, especially the chunkier ones like this.

Thanks also for all your support and advice on my boiler build - much appreciated.

gary