Model Engine Maker

Engines => From Kits/Castings => Topic started by: simplyloco on July 01, 2020, 05:28:56 PM

Title: Yet Another Stuart Major Beam Engine
Post by: simplyloco on July 01, 2020, 05:28:56 PM
Hi folks. I've been absent for a while since I finished all those engines. I've just bought an unfinished Stuart Major that will keep me busy after I've finished my current locomotive, and I see that there is an excellent thread by Chipmaster to follow!

(https://i.imgur.com/Va1PQWE.jpg)

 I've been distracted by this which will be finished shortly...

(https://i.imgur.com/79tiAuY.jpg)

I look forward to posting on here again.
John

Title: Re: Yet Another Stuart Major Beam Engine
Post by: Jo on July 01, 2020, 06:55:18 PM
Is this a second Major Beam after that one you beat me to in 2017  :stickpoke:

And how's the Britannia coming on  ::)

Jo
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on July 01, 2020, 07:29:12 PM
No, it isn't, as it is is my first Major beam, and the Britannia is just how I want it thank you.  Its condition is my business, not yours, and if you want to criticise or score points may I suggest you do it on the MECH forum?
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Jasonb on July 02, 2020, 07:30:08 AM
Loco in the photo (don't think it is a Brit) looks good and does not look like it will need much more work before you get onto the beam at least to my non loco eyes.

Looks like someone had all the fun of machining the castings and has left you with the fiddly bits at least you won't have the problem of fitting the flywheel onto a lathe. What's the previous workmanship like?
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on July 02, 2020, 08:47:27 AM
Hi Jason. Yes, the 'major' work has been done, and I quite like doing the fiddly bits! What small bits that have been done are not done well, so there's a winter's work for me!
The loco is a Stirling 8 foot Single, circa 1870.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Mcgyver on July 02, 2020, 01:16:49 PM
That locomotive looks fantastic.  I've a set of major beam castings still aging away....nice to see one where things are getting done!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on July 02, 2020, 06:31:15 PM
I've done an initial inspection today, just to give me an idea of that which I have bought. Even though the main casting work looks reasonable, there is much to rectify or replace. In summary, if I offered it to my two Shi-Tzus for breakfast they would relish it!
A few examples;
Entablature is two mm too fat against the main column. It ill have to be machined properly to size.
(https://i.imgur.com/8GgGdb8.jpg)

I would be ashamed of these parallel motion links!
(https://i.imgur.com/eBrUEoD.jpg)

As I would these!
(https://i.imgur.com/5UBudIt.jpg)

This piston rod gland is well oversized and would not grip the packing if it tried!
(https://i.imgur.com/q4xMqrq.jpg)

Here's the porting. BTW the apertures are huge!
(https://i.imgur.com/VbN2Bmi.jpg)

Here's the cylinder now that I have marked it out. I hope that he was going to machine the ports to size...
(https://i.imgur.com/EjKggjo.jpg)

I'll put it all away and finish the Stirling.
Thanks for looking in.
John

Title: Re: Yet Another Stuart Major Beam Engine
Post by: gary.a.ayres on July 06, 2020, 10:01:54 AM
The loco looks amazing.

The Stuart Major will be quite some project - enjoy!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on November 27, 2020, 06:22:12 PM
Back onto the Stuart Major as the Stirling Single is now 'resting' on the sideboard in the conservatory! I want to get the major components finished before I attack the detail, so I made a start on the cylinder porting. I haven't used the FB2 mill attachment for yonks, so it was nice to feel a 'real' mill at work rather than my Proxxon BF40. I used a 7/32 3 flute cutter, and just split the scribed lines by eye. The ball end cutter eased the flow in the bottom of the ports. Measuring up afterwards I'm only a a couple of tenths of a millimetre out so that is fine. I'm in two minds as to whether I should 'square up' the port ends. This is a plodding engine, and as I'm getting lazy in my old age I might just leave things as they are!
More tomorrow.
John

(https://i.imgur.com/arSTJba.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 15, 2020, 06:22:04 PM
Mating the base plate to the cylinder casting.

I've got the seasonal activities out of the way so time to crack on! I was very unhappy with the plate/cylinder mating faces, so unhappy that I was seriously thinking of moving the whole thing on! However, I gave myself a shake and told myself "You are a precision engineer! Fix it!" so here are a few pics.

The problem: wrong base screw fixing pcd puts the cylinder 3mm out of position. The only solution was to machine the base plate boss to suit.

(https://i.imgur.com/eSZtgaP.jpg)

I knew that I was pushing my luck with this little boring head...

(https://i.imgur.com/9te8XKA.jpg)

I removed the tailstock and got stuck in. Lowest revs and a gentle feel on the quill sufficed.

(https://i.imgur.com/yOhdgcH.jpg)

Gently does it until the tool touched the base plate surface.

(https://i.imgur.com/LsUAKFj.jpg)

I call this a result! I'll get rid of the chatter marks with a round file. V. Happy to move on.
(https://i.imgur.com/n15hpqa.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipmaster on December 15, 2020, 09:21:14 PM
Hi John,

it was fortunate the cylinder mounting pad on the bedplate was sufficient to move the cylinder along, looks like an effective recovery.

Andy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 15, 2020, 11:10:19 PM
Yes, I was quite lucky there! I found this archived ad from Station Road Steam. I love the black theme and I rather like the simplified drop links and I might just adopt them!
John
https://www.stationroadsteam.com/stuart-major-beam-engine-stock-code-5274/
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 16, 2020, 06:26:26 PM
There's no Valve Chest in the box! :Mad:

A new CI casting from Stuart Turner is £50 plus postage, which I am not prepared to pay, so I found a bit of flat MS and started work this afternoon.
First job: slit it to size.

(https://i.imgur.com/h7XQdVb.jpg)

Chain drill and chisel it out the old fashioned way. I'm getting used to the new DRO now: that's a 5.8 mm drill being shifted 6.00 mm each time. No dramatic incursions into adjacent holes!
(https://i.imgur.com/3B17YDa.jpg)

Hacked out with a 10mm 4 flute end mill.
(https://i.imgur.com/HzDAXOi.jpg)

Corners finished off with a 6mm end mill.
(https://i.imgur.com/tqcgD9F.jpg)

Tomorrow I'll make the gland boss and silver solder it in.
(https://i.imgur.com/ncHtgJ8.jpg)




Title: Re: Yet Another Stuart Major Beam Engine
Post by: Admiral_dk on December 16, 2020, 10:13:59 PM
In the end you will be very satisfied with the replacement you made  :ThumbsUp:
But that might not completely remove the annoyance of not getting what you paid for to begin with ....

Best wishes

Per
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 16, 2020, 10:27:32 PM
It's OK Per, I bought it from a deceased estate at very little money. It's just a bit of fun!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on December 16, 2020, 10:54:46 PM
Nice work on the valve chest. At least you didnt find it missing after paying for a brand new kit though!

Your stirling single looks brilliant too
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 16, 2020, 11:01:43 PM
Nice work on the valve chest. At least you didnt find it missing after paying for a brand new kit though!

Your stirling single looks brilliant too
Agreed, a new set of castings is £1250.00!
Thanks for the kind words.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 17, 2020, 04:41:23 PM
More Horror Stories!

Well, I've got a half decent valve chest with a screwed in gland boss that I can remove to drill the pcd holes. However, the cylinder cap edge is not circumferential to the cylinder, so if I want 'perfection' then I'm going to have to mount the cylinder in the rotary table and do the necessary on the mill: carefully...  :censored:
In addition, whoever made the cap forgot that the gland has to have a tapered  seat, so I will make a suitable insert. Luckily there is just enough of a lip at the bottom to hold the new seat in place. I will also either counterbore the stud holes or turn the domed upstand back a little to accommodate the nuts!
All good fun!

(https://i.imgur.com/b5RM0AD.jpg)

(https://i.imgur.com/dS5y5Jp.jpg)

(https://i.imgur.com/vHsp79Y.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 18, 2020, 08:03:24 PM
Cylinder Mating Faces Sorted

I took the chuck off the rotary table and on mounting the cylinder I found I had plenty of room to fit a decent end mill. Clocked up the line using the pin and eyeball method, brought the job to the cutter, locked the beds and wanged it round by hand taking great care not to climb mill into the protruding bit.
Worked a treat and I'm happy with it. Not quite perfection but it is good enough!
John

(https://i.imgur.com/xiwu43v.jpg)

(https://i.imgur.com/kTtOXlx.jpg)

There's no Slide Valve casting either...

I found a lump of brass which on which I took some hacksaw exercise!

(https://i.imgur.com/U6WzY44.jpg)

I'll use a ball head cutter to shape the internals: a simple steam way should do fine. Here's a piece I practiced on, I hope this approach will be sufficient as the thing will get tested once on steam and 'electrified' after that! I'll set the DRO dimensions tomorrow.

(https://i.imgur.com/Sb0s0eL.jpg)


Whilst my new vice was clocked up I took the opportunity to run the long series end mill along the back edge. Setting the vice up will be so much easier in future.

 (https://i.imgur.com/exSnCPq.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 19, 2020, 12:57:57 PM
Hi All.
I was looking in the Station Road Steam Archive for relevant material, and I found this modern take on our engine. I quite like it as parts of it are refreshingly different! What do you guys think as it's a Marmite/Peanut Butter question!
https://www.stationroadsteam.com/stuart-major-beam-engine-stock-code-5274/
John

(https://i.imgur.com/wlrDJU5.jpg)

(https://i.imgur.com/YjAAR5p.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipswitheverything on December 19, 2020, 02:59:06 PM
I remember when this engine turned up for sale at SRS a while ago.  Personally, as in the case of my own engine, I favour making the links in the "proper" manner, as Andy has also done, as they have so much more interest and visual appeal in their traditional detailed construction, and are a prominent part of a beam engine. The simplified versions do have a bit of a "cop out" look,and the socket screws are deeply anachronistic, but the choice is with the builder....!  ( And the bits could always be removed later..! )  Dave
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 19, 2020, 04:34:34 PM
Hi Dave, and you are quite right about the anachronisms! I'll stick with the drawing. I also have loads of green gloss 2 pack paint left over from the Stirling Single... 8)

Slide Valve

I know that it can't be seen but it feels good to hew a solid block into a pleasing shape!  I'm catching you up already Alan Andy! :cheers:

(https://i.imgur.com/3MMLjM8.jpg)

(https://i.imgur.com/uj5FlhL.jpg)

(https://i.imgur.com/lEMGbEj.jpg)

Lathe work next week: piston rods etc.... :whoohoo:

Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipmaster on December 19, 2020, 09:34:50 PM
Is 'Alan' me?

Andy

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 19, 2020, 10:24:56 PM
Is 'Alan' me?

Andy
My apologies. Its you!😊
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 20, 2020, 09:04:54 PM
I lied about making the Piston Rods...

I really was going to make some small stuff next, but this large, lumpy, horribly painted non concentric column winked at me and said "Do me next!".  I'm glad I listened as it is starting to look quite nice turned to the correct dimensions, as with the original 1968 H A Taylor build.
 The casting is well oversize, and I can't imagine why the previous builder would want to leave it as it was.  I made an alloy plug for the top end. I don't have a taper turning attachment, so I used the compound slide to good effect. I did the bottom radius with 14"  and 8" files and emery cloth as I have no form tools that size. I'll do the other end tomorrow and bring out the Solvol Autosol!   :)
John

(https://i.imgur.com/tpjFjb9.jpg)

(https://i.imgur.com/24abJEo.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 21, 2020, 04:44:56 PM
I am going to paint it!

I know that there are a few Majors out there with a polished column, but the real ones didn't have one, so I'll paint it. If I can achieve a similar paint finish to my Stirling then I will be very happy! I have loads of 2K Gloss Green left, and some POSCA lining wouldn't go amiss either...  :LittleDevil:
This blasted cast iron dust gets in everywhere, and I mean EVERYWHERE!
John

(http://i.imgur.com/iiIFLiC.jpg) (https://imgur.com/iiIFLiC)

(https://i.imgur.com/NtYJvNe.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on December 21, 2020, 05:47:39 PM
Your column is very shiny.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on December 21, 2020, 09:14:40 PM
Looks much better!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipswitheverything on December 22, 2020, 02:18:11 PM
I had rather fancied leaving the column bright, albeit not correct to the prototype, but the casting, wh. was from the original Stuart Turner concern, had areas of minor blowholes, such as i can see just above the base of your column casting:  -  and an overall surface porosity that would not clean up to uniform polished metal, so painting it is for it.  I think that H A Taylor may have hewn his column from stainless...   Dave
Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on December 22, 2020, 02:55:37 PM
 :ThumbsUp: :ThumbsUp: :ThumbsUp: :ThumbsUp:

I would certainly paint it - it's more accurate and what not, but I'm hugely impressed by the quality of finish achieved. Very inspiring for us mediocre builders.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 22, 2020, 09:18:59 PM
I've changed my mind!

This afternoon's job was to finish the column. I was going to paint it, but the casting quality is excellent, and looking at the examples that people seem to admire most it looks like I'm polishing it and painting the contrasting bits 2k Satin Black.

The column top was oversize by 2.5mm on one side, causing the entablature to extend beyond its support strut alignment position. As I said it's a right dog's breakfast...

Successive filing, some emery cloth and finally some Solvol Autosol. On reflection - pun intended- it could be stainless steel!

(https://i.imgur.com/FGv2orf.jpg)

Supporting the column end with a 8mm drill bit to get it level. The EMCO V10P table isn't the biggest but I can usually get away with it!
(https://i.imgur.com/HskM0gw.jpg)

I now have to trim the entablature to size, both in thickness and width, but at least it is in the right place now. However, the supplied strut is too short so I need to make a better one! I have to do something with the cylinder cap as well!

(https://i.imgur.com/ncCUTz7.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on December 22, 2020, 09:43:01 PM
Beautiful finish on that column
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 23, 2020, 02:57:28 PM
Cylinder Cap and Gland

This item was in a pretty sorry state: no attempt had been made to profile the neck, and the gland seats were missing in both bits! The cylinder rim needed reprofiling: you can see the problem!

(http://i.imgur.com/f3OVfrS.jpg) (https://imgur.com/f3OVfrS)

Getting in there to do the neck was a bit tricky, but my recently discovered profile tool made it a lot easier, moving the tool post around to accommodate the cuts. I had to grind some relief on the LHS of the tool, and nearly went too far as it is s**t metal...

(https://i.imgur.com/lFGtqHO.jpg)

This what it now looks like. There are a couple of tiny inclusion marks but some people need little things to pick at!  :stickpoke:
Very happy so far.  :Love:

(https://i.imgur.com/mtoS4AV.jpg)

On the beast, showing off the reprofiled cylinder rim.

(https://i.imgur.com/T90avOW.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 26, 2020, 02:58:31 PM
Entablature is much worse than I thought!

Over width, over height, too thick on one side - beam gap is 25 thou undersize-  and very uneven casting lines.

(https://i.imgur.com/vd2H0mH.jpg)

(https://i.imgur.com/3zxlHeT.jpg)

Clamped directly to the table, machined evenly both sides.

(https://i.imgur.com/2m4vNsI.jpg)

Clamped to the table for the height adjustment on both sides. My vice jaws wouldn't open enough!

(https://i.imgur.com/DnT8reh.jpg)

Leaving the machine settings as they are and moved the clamps. No lumps!

(https://i.imgur.com/IOCdsY7.jpg)

Much better, but I might machine the casting line nearer the join. The cylinder fettled up nicely too!

(https://i.imgur.com/MUjBZDc.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 27, 2020, 05:14:47 PM
2k Satin Black Tryout

Well, I used the hemi carbide 1/4" cutter to clean up the errant casting lines, and it seems to have worked OK. Etch primer and three coats of 2k satin black. It's a bit shiny for my taste, and I might do another well thinned coat to reduce the gloss, but I'm tempted to declare it's a 'Major' improvement over what went before!  :)
John

(https://i.imgur.com/wEO7jXn.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Dave Otto on December 27, 2020, 09:51:23 PM
Looks very nice!
I like the satin black.

Dave
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 27, 2020, 10:35:11 PM
 Hi Dave, and a Happy New Year to you! I'm warming to the colour!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on December 27, 2020, 11:50:22 PM
The black goes really well with the polished parts

Sent from my G3121 using Tapatalk

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 28, 2020, 09:09:44 AM
Thanks for your kind comments, they keep the motivation coming! I see from your avatar that you are a Landy fan. I bought my Mk3 SWB County when I was working in Qatar, and had it shipped home. Sadly it had to go eventually when I needed the money!

(https://i.imgur.com/6dHoyOv.jpg?1)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 28, 2020, 07:46:31 PM
Painting the Baseplate

This baseplate looked like it had never been fettled before painting.  I spent the afternoon improving the baseplate, hopefully as the following pictures will prove! I'll put on the topcoat tomorrow and then I can get on with the fun bits!

Restored all round and all over with a bastard file and the delta power worker.

(https://i.imgur.com/dvU3Dx2.jpg)

Cleaned up with wire brush, gunwash and a dry rag!

(https://i.imgur.com/ykc0BRz.jpg)

Crisp edges and flat surfaces. Well pleased!

(https://i.imgur.com/RdZiQ4K.jpg)

I missed the flash in the LHS of the crank well aperture!  >:(

(https://i.imgur.com/CvQihDR.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Dave Otto on December 29, 2020, 12:25:05 AM
Much better! :ThumbsUp:

Dave
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 30, 2020, 11:19:00 PM
To lag or not to lag, that is the question!

Some tryout pics for you, using 1/8" thick maple battens made on my FET saw.  I was thinking of securing them with stainless bands to match the brightwork. I am still undecided...

(https://i.imgur.com/VFVSU5B.jpg)

(https://i.imgur.com/G9EzSWH.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on December 30, 2020, 11:49:00 PM
If they were stained/oiled darker they would look good. The edges would need to be beveled a little to get a close fit.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: derekwarner on December 30, 2020, 11:56:35 PM
If it were a vote, I would agree the stained/oiled wooden slats would add a prototypical vista......taking it one step further, you could consider adding 3 x horizontal bands of 1/8" cork to the as cast in reduced diameters of the cylinder OD.......


 :noidea: ......a 12" [300 mm] square self-adhesive cork floor tile would be idea...and also provide a sound gluing surface for the wooden slat to cork interface

Looking forward to progress in 2021

Derek  :cheers:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: steam guy willy on December 31, 2020, 02:48:16 AM
Hi You could profile the individual strips by using a scratch plate or a Vernier to give a bit more interest..this is on an Easton and Anderson engine....

Willy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on December 31, 2020, 11:52:27 AM
If they were stained/oiled darker they would look good. The edges would need to be beveled a little to get a close fit.

Many thanks for your inputs. Agreed on the darker finish. Regarding the edges, I have a Proxxon FET saw, so I was able to bevel them at precisely 11 degrees during manufacture. Hopefully you won't see the join (honest!) O:-)
John
(https://i.imgur.com/PstQUYA.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 01, 2021, 03:54:04 PM
I took the plunge!

Thin Balsa is the model engineer's friend. Superglued in two layers to bring it up level with the ribs.

(https://i.imgur.com/ZJ4XfzN.jpg)

As you can see, it made a very nice base for the hardwood planks.

(https://i.imgur.com/yPUrhbX.jpg)

A big, new LARGE file brought everything level pretty quickly!

(https://i.imgur.com/2drgF9E.jpg)

Some sanding time later...

(https://i.imgur.com/77Fk3Xz.jpg)

A tryout with stainless bands. The virgin Maple is a bit too bright methinks.

(https://i.imgur.com/CW9mEj7.jpg)

Mahogany stain is better, but I'm still undecided about the colour. I tried a Dark Oak first of all, but it looked terrible!  I'm tempted to paint it black and keep the bright bands!

(https://i.imgur.com/T8q8thY.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 04, 2021, 07:21:39 PM
I finished the lagging and oiled the wood but painting the bands is still under discussion!

(https://i.imgur.com/TmwFHVX.jpg)

The valve chest cover and the flange on the cylinder looked a bit bulky, even though they had been machined. On checking the drawing the cover needed 2 mm taken off, and the cylinder flange still needs 3.5 mm removed! The castings' dimensions are not up to normal Stuart standards so who knows where they came from...

The bronze boss was left on for a reason: grip it in the tailstock chuck and tighten the chuck jaws around it!

(https://i.imgur.com/qYrZNsb.jpg)

It was only 0.5mm out but I had to clock it!

(https://i.imgur.com/WcVmeEo.jpg)

There was 0.75mm variation in the thickness!

(https://i.imgur.com/9feDbiA.jpg)

Turned around and gripped on the boss. Took off nearly 2mm!

(https://i.imgur.com/IuUfx9P.jpg)

Cover and chest now to size but you can see the fatness of the cylinder flange. I'll machine it off tomorrow.

(https://i.imgur.com/irx68Fm.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 10, 2021, 06:59:32 PM
I remember reading on this forum that it was impossible to fit the valve rod without drilling a hole in the base of the steam chest to insert the thing, which required a plug. As I had to make a new steam chest I made a screw-in boss which makes it easy. The home made slide valve sits well in there too!
(https://i.imgur.com/HK970ZT.jpg)

I have to make some standoff washers the same size as the home made nuts otherwise the paint will be damaged. I'll finish this cylinder sometime soon!!!

(https://i.imgur.com/3H7J0f4.jpg)

It's all coming along nicely.

(https://i.imgur.com/d2cwi4u.jpg)




Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 14, 2021, 05:40:13 PM
Valve Hand Lever

Looking at other people's examples of this awkward little piece led me to consider fabricating it. Here is the story.

(https://i.imgur.com/v8CDHWF.jpg)

I made the wiggly bit first, utilising an extension piece supported by my home made low profile revolving centre.

(https://i.imgur.com/FmqZT74.jpg)

(https://i.imgur.com/u1wbqML.jpg)

Then I made the shank from 1/8" plate,turned the bit with a hole in it and filed the keyway. There is silver solder paste at the joint.
Yes, I know now that the keyway is in the wrong place!

(https://i.imgur.com/dbXXMYJ.jpg)

Silver solder paste costs more than gold, but it's worth it!

(https://i.imgur.com/05gvcp2.jpg)

There's a spigot on the handle base which I used to locate the handle when soldering it on. I'm very please with it. If anyone says they heard it was made from solid like everybody else does I'll tell them it's a complete fabrication! :cheers:

(https://i.imgur.com/uiEFB8M.jpg)



Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 19, 2021, 02:02:28 PM
More Fabricated Bits!

Actuator Arms and Valve Motion Links, all connected with Cupalloy silver solder paste.

(https://i.imgur.com/jiVcRBv.jpg)

(https://i.imgur.com/uoo8Svr.jpg)

(https://i.imgur.com/JJjUJVO.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: Admiral_dk on January 19, 2021, 10:21:08 PM
Very nice work  :ThumbsUp:

If you still thinks the colour of the wood is too light - how about soaking it in old used motor oil ?

Best wishes

Per
Title: Re: Yet Another Stuart Major Beam Engine
Post by: SkyArcher on January 21, 2021, 12:39:03 AM
More Fabricated Bits!

Actuator Arms and Valve Motion Links, all connected with Cupalloy silver solder paste.

(https://i.imgur.com/jiVcRBv.jpg)

(https://i.imgur.com/uoo8Svr.jpg)

(https://i.imgur.com/JJjUJVO.jpg)

Thanks for showing your work.  I was hung up on making my links and you gave me an idea on fabricating my links. :ThumbsUp:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: steam guy willy on January 21, 2021, 01:54:21 AM
Hi Looking good.  :popcorn: :popcorn: :popcorn:

Willy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 21, 2021, 08:14:21 PM
Valve Crosshead Rod

Once again, I took the fabrication route as this is a horrid little piece to make from solid! I decided that I didn't have to copy the drawing, opting for a tapered cross head profile, incorporating threaded end caps so that I didn't have to slice the bronze bearings. I'm quite happy with the result. I have to solder the centre piece on tomorrow and polish it to the usual standard!
John
(https://i.imgur.com/Lwy83Ve.jpg)

Bronze bushes pressed in and fitting nicely! I turned the taper profile afterwards.

(https://i.imgur.com/z1zHyrP.jpg)

The width had to be 2.5". Close enough...

(https://i.imgur.com/bsIFx3x.jpg)


 I can live with this!

(https://i.imgur.com/8ipilOA.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 22, 2021, 06:19:47 PM
I do like a bit of spit and polish! Soft soldered on and the tiny gap has filled nicely.

(https://i.imgur.com/mr4p8Ix.jpg)

Big nuts or small nuts? Which is nicer? I'm leaning towards small nuts...  ;)

(https://i.imgur.com/GukZOe5.jpg)

(https://i.imgur.com/n8VKmT5.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 24, 2021, 05:22:28 PM
Valve Shaft Bearings

Not difficult, but it turned into a tricky little job as the original owner had played with the castings to their detriment!  Off centre holes and faces, and worst of all, he had part drilled the bearing holes before slicing! Consequently I couldn't just mount them in a four jaw and resorted to the FB2 Milling Machine.

(https://i.imgur.com/YvOteTT.jpg)

You can see the part drilled hole in the LH casting. This meant it was impossible to drill and ream an accurately placed hole in the normal way. To get over this I plunged a 5mm 3 flute end mill through the casting, and followed up with a 5.5mm reamer. It worked!

(https://i.imgur.com/qeBCXwl.jpg)

Now we are getting somewhere! I now have to pretty up the bearings, make the oil cups, and fix the bearings onto the base plate. BTW the slotted screws are only temporary...

(https://i.imgur.com/fqI0PGO.jpg)

(https://i.imgur.com/pfyiru0.jpg)




Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipmaster on January 24, 2021, 07:05:33 PM
At the rate you're going you may finish your Major sooner than I complete mine.
Stating that the slotted screws are temporary is necessary, otherwise you might be criticised ..... :LittleDevil: :popcorn:

Andy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 24, 2021, 07:55:16 PM
At the rate you're going you may finish your Major sooner than I complete mine.
Stating that the slotted screws are temporary is necessary, otherwise you might be criticised ..... :LittleDevil: :popcorn:

Andy

Hi Andy, good to hear from you. I can't help but work fast, it comes from my time looking after a sub-contract machine shop, where time really was money!
I take your point about the slotted screws, but I always ask the rivet counters "How did you do yours..."
You haven't commented on my fabrication methods, I'd be interested in your views. Is it heresy or what?  :stir:
Regards
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipmaster on January 24, 2021, 10:12:09 PM
Well John itís your engine to build as you wish, 'each to his own'.
The Major is my largest model engineering project, Iím not in a hurry to complete it, started mine six years ago!
I usually enjoy taking on the challenge of making the parts as drawn, even though some failed and had to be made twice. The parts you have made look to be effective and nicely finished so thatís ok.
As I am self-taught not a professional engineer like yourself I wouldn't dream of passing judgement on other members methods. 
I find the MEM community is where I pick up so much good practice, advice and encouragement.

Andy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 24, 2021, 10:45:19 PM
SNIP
I find the MEM community is where I pick up so much good practice, advice and encouragement.

Andy

Hi Andy. Even though I'm a time served Fitter/Machinist it doesn't make me a good model engineer. Like you, I've learnt a great deal from following ME forums!
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: scc on January 25, 2021, 10:38:55 AM
John, I couldn't agree more. I too am time served but that was 55 ish years ago. This forum is where I find out how to sort model engineering.          Terry
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 26, 2021, 05:33:40 PM
Valve Chest Cover Beautification

This cover is held on by six huge 4BA studs, and to me it is as ugly as sin! I determined to rectify this, and I spent this afternoon making a 1.6mm thick pierced steel plate, tapped for 20 x M2.5 stainless steel studs. This will be attached to the valve chest cover using four of the M2.5 studs, the cover underneath being held on with six countersunk 4BA screws instead of studs and nuts.
It is just an experiment, but it has to be an improvement!

(https://i.imgur.com/Sv7Qlft.jpg)

A better idea of scale. I'm thinking of chemically blacking it and the nuts, leaving the stainless studs bright. I have to say I like it very much!
(https://i.imgur.com/Ino6cR1.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 27, 2021, 07:20:48 PM
Valve Chest Cover is Now a Little Prettier!

I know that some people will hate this approach, but I love it. The Victorians were very good at what we now call 'Bling'.😱
I blacked the nuts, it's proper cosmetics for blokes!
I haven't bolted it on yet, but I will tomorrow

The cover plate is held on to the original cover in four places. You can see the studs that will be used.

(https://i.imgur.com/4M6phni.jpg)

All the nuts and studs fitted, including the steam inlet flange.

(https://i.imgur.com/f8Ul4PR.jpg)

Victorian Bling methinks!  :D I'll put it together tomorrow and see what it looks like :)

(https://i.imgur.com/E3QXQbb.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on January 27, 2021, 07:21:58 PM
Nice 'Vling'!  How did you do the blackening?
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 27, 2021, 08:23:49 PM
Nice 'Vling'!  How did you do the blackening?

Hello, and thanks for your post. I have a blackening kit from Polly Models in the UK. A four stage cold process which only takes about five minutes if you productionise it! It seems to resist corrosion too, unlike some.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 28, 2021, 07:29:25 PM
I couldn't resist a tryout!

(https://i.imgur.com/FsXCFI8.jpg)


My Choice of Piston Rings.

I see much wailing and gnashing of teeth over the choice of piston ring material: Cast iron, PTFE, Fluorosint etc..
I intend to build this to be run by an electric motor, but with the option of running it on compressed air. Steam is OK on locomotive tracks, but it is hot, smelly and makes an awful mess on the mantlepiece...  :Mad:

I'm no expert on bearings, but Visconite is a self lubricating plastic bearing material which is used for low speed/temperature applications such as marine prop shafts. It also doesn't expand much in the presence of water, and most handy of all, it doesn't go rusty, so this is what I'm using in my engine, mainly because I just happen to have a lump of it in the drawer!

It's lovely stuff to machine, leaving a silky smooth finish.

(https://i.imgur.com/BMyX7V1.jpg)

Scarfed joint made with a thin saw blade. It fits just fine in the cylinder!

(https://i.imgur.com/osyfkee.jpg)

Tomorrow should see the cylinder group completed!
Beam or flywheel next?
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on January 30, 2021, 05:37:26 PM
It's been a busy couple of days!

Buying a part built is always a gamble, and this one was no exception. Careful examination is a must! Today I cleaned up a pile of bits, made some 2BA studs and locknuts for the crankshaft bearing blocks, machined the crankshaft and was thus able to do a trial assembly. The green painted bits have not been touched yet, apart from some rust removal, and the difference in the finish is profound and I can't wait to apply some decent paint!
There are still some glaring errors, and the parallel links will be time consuming, but I should be finished by the Summer Holidays!


(https://i.imgur.com/QG8wnOD.jpg)

(https://i.imgur.com/UCHBNc1.jpg)

(https://i.imgur.com/Ft7zC1f.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on February 05, 2021, 07:47:43 PM
Eccentric and Valve Rod.
 
Not a lot going on lately as we have had two recent Covid tragedies in our close family. However, I got into the workshop today and worked on the eccentric and the drive rod. I did something about the eccentric: I cut off the offending bit and silver soldered another piece on to it! The eccentric body was 1/8" too fat so had to be machined down, and the bronze casting finish was 'orrible...

Once again,  I refused to make this out the solid! Three pieces silver soldered together. I also dumped the slotted design and used a threaded bearing end cap, as with the other actuator bits.

(https://i.imgur.com/wgMz4s7.jpg)

(https://i.imgur.com/Djr0ThX.jpg)

(https://i.imgur.com/4e6Ur2K.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 01, 2021, 10:39:32 PM
Hello again. I left the forum a little while ago as I, like others who have recently expressed a similar opinion, felt that I was posting my build progress into thin air. However, this forum is valuable and should be encouraged, so I've rejoined and here are some recent progress pics. I'm basically copying the format of the Taylor build from 1968. With some improvements... :whoohoo:


This one 'ere!
(https://i.imgur.com/Pw5czpF.jpg)

Steam valve plumbed in.
(https://i.imgur.com/OLyjgIM.jpg)

Conrod waiting for split bearings.
(https://i.imgur.com/srh6Svv.jpg)

Machining the fake grouting on the plinth. It will be dusted with silver sand and painted white (ish).
(https://i.imgur.com/pcjGINQ.jpg)

Maple planked floor.
(https://i.imgur.com/Fwj8D4v.jpg)

Starting to look like it's nearly finished!
(https://i.imgur.com/BBg80pK.jpg)





Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 01, 2021, 11:27:45 PM
Wow!  Glad you've chosen to post your progress on this engine again!  You've made some good progress and it's very interesting to see how you've done the brickwork for the plinth. Can't wait to see it all painted!   :popcorn:

Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on April 02, 2021, 08:19:16 AM
Very nice, I've been following along on facebook in the stuart group
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 02, 2021, 08:25:44 AM
Very nice, I've been following along on facebook in the stuart group

Good morning and thanks for the feedback! May I ask your username?
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 02, 2021, 05:24:55 PM
The Governor! Part 'A'
Once again, I'm not partial to machining things from solid when I can make -I think- a neater job by fabricating it. This part is specified mild steel but I'm making it out of brass as I like a bit of 'bling'!

(https://i.imgur.com/eDNhQ7Y.jpg)

Part on a stick. I slotted the end 3/16 wide and 1/4" deep.

(https://i.imgur.com/pLnSbhU.jpg)

Turned the basic shape. I found out later that I should have used 7/16" bar and not 3/8"...

(https://i.imgur.com/XazUodF.jpg)

Another part on a stick, drilled and slotted.

(https://i.imgur.com/WUWEOpG.jpg)

Solder paint job. I put the piece back in the lathe and drilled and reamed the additional piece. It is very slightly off centre but it looks OK on the machine!

(https://i.imgur.com/wsNqh8k.jpg)

It needs a polish, but it will do...  O:-)

(https://i.imgur.com/bdUzvie.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 02, 2021, 06:37:28 PM
I agree!  It looks very nice on the engine :ThumbsUp:
Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: AOG on April 02, 2021, 08:36:17 PM
It looks great. One question. When you say solder paint, what is that? Is it hard solder or soft solder?

Tony
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 02, 2021, 10:37:31 PM
It looks great. One question. When you say solder paint, what is that? Is it hard solder or soft solder?

Tony

Hi Tony. It is soft solder finely ground into a paste. No flux needed.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: AOG on April 03, 2021, 12:35:53 AM
Thanks, it was the paint term that got me. We generally know it as paste solder. The stuff we have is more like a thick grease consistency.

Tony
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 03, 2021, 09:29:44 AM
Andy mentioned walkways. This is one I prepared earlier, and I was going to paint it black.
I'm still undecided whether to use it...
John

(https://i.imgur.com/LMBNtSe.jpg)

(https://i.imgur.com/Z52W4Rs.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Chipmaster on April 03, 2021, 11:03:59 AM
Morning John,

I appreciate the dilemna with the walkway issue, it's difficult to acheive something that looks right. There's the risk that it could detract from the overall appearance of a model. I've posted a little more about walkways on my build log.

Andy



Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 03, 2021, 08:49:04 PM
The Governor! Part 'B'.

I made this in three parts: barrel, cross piece and finial. Same technique as for the lower part.

(https://i.imgur.com/jKC95FW.jpg)

Silver soldered this time as I didn't want it flying off the top!

(https://i.imgur.com/CU6VhbU.jpg)

Mounted on a 4BA stud, drilled and tapped 4BA for the finial.

(https://i.imgur.com/7jMU2B5.jpg)

Starting to look quite pretty although they could always do with a bit more polishing!! I really do think that fabrication is the way to deal with these tricky parts.

(https://i.imgur.com/8VQAdyb.jpg)

(https://i.imgur.com/ASlMDMz.jpg)




Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 03, 2021, 11:57:30 PM
Certainly is very nice looking!  :popcorn:
Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Roger B on April 04, 2021, 11:44:57 AM
Looking good  :ThumbsUp:  :ThumbsUp: I'm glad you decided to start posting again  :)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: pgp001 on April 04, 2021, 11:51:15 AM
Hi John

Just catching up with a few threads here.

Re your walkway, I personally think it would look better without it. We use that perforated material a lot at work, and to my eye it does not sit well with the rest of the model.
I hope you take my comments as being constructive.

Phil
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 04, 2021, 12:08:48 PM
Hi John

Just catching up with a few threads here.

Re your walkway, I personally think it would look better without it. We use that perforated material a lot at work, and to my eye it does not sit well with the rest of the model.
I hope you take my comments as being constructive.

Phil

Agreed, no problem.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on April 04, 2021, 02:10:17 PM
Nice work John. I wonder if you could get like a miniature tread plate for the walkways (the old style not the modern checker plate)

Sent from my G3121 using Tapatalk

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 07, 2021, 09:34:21 PM
The Governor's Ball Joints!

Not a lot to show for three or four afternoons' work, but I think I've cracked how to machine bosses on the surface of the arms. The chuck  holds a bathtub fixture which in turn holds the work piece. I'm still experimenting but it's simple and looking good so far... :)

(https://i.imgur.com/m4x1o0W.jpg)


(https://i.imgur.com/GbpHzc1.jpg)


(https://i.imgur.com/Un6SqYI.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Don1966 on April 07, 2021, 10:47:49 PM
Nice work .....  :Love:


 :cheers:
Don
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 07, 2021, 11:35:11 PM
Nice work .....  :Love:
 :cheers:
Don

Hi Don. I might just do without the bosses as they are just 7 thou high and just polish everything just nice. At my age who needs bosses anyway!
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 08, 2021, 05:27:36 AM
The bosses look good, but whatever you think would be best for your build!  You are the master engineer on this project, so what you say goes! :)

Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 08, 2021, 09:07:02 AM
The bosses look good, but whatever you think would be best for your build!  You are the master engineer on this project, so what you say goes! :)

Kim

Agreed! No bosses or walkway: decision made.
Sorry Sam!😇
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 08, 2021, 06:24:54 PM
More on The Guvnor's Balls!

After three hours of close, detailed work, and if you haven't ruined these two tiny pieces of metal through an inadvertent file stroke or argument with a polishing spindle, or dropped it on the floor, never to be seen again, you might land up with two like this...
BTW I abandoned the idea of the bosses, just too fiddly!

Two 3/16" filing buttons, used both ends.

(https://i.imgur.com/Kc5T5jM.jpg)

Both ends rounded, now held in a large toolmaker's clamp to profile the edges. I took them over to the Proxxon to finish sand them.

(https://i.imgur.com/6UeVud8.jpg)

Two little darlings!

(https://i.imgur.com/cWGcIKd.jpg)

Of course, the drawing doesn't show enough clearance on the carriers for the link ends, but that can be fixed easily enough!

(https://i.imgur.com/53m5CY0.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: scc on April 08, 2021, 07:28:42 PM
Nice :ThumbsUp:               Terry
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Vixen on April 08, 2021, 07:46:57 PM
Nice work John.  :ThumbsUp: :ThumbsUp:

 A very elegant and pleasing curved profile.  The Victorians had an eye for style.

Mike
Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on April 09, 2021, 11:27:13 AM
Excellent work - and I just learned a new technique. Filing buttons - never occurred to me before as a means of getting a good radius like that.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 09, 2021, 03:42:04 PM
The Guvnor's Balls are in the Air! (Edited :LittleAngel:)

I've had a few projects in the air in my time but none were this tricky!

As per drawing. The pivot shafts are temporary...

(https://i.imgur.com/eUMmRog.jpg?1)

On the machine. Oooh I'm chuffed!

(https://i.imgur.com/rBYHEwG.jpg)

(https://i.imgur.com/y7WsxF9.jpg)





Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on April 09, 2021, 04:19:26 PM
Beautiful engine - these pictures are great.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 09, 2021, 04:27:18 PM
Beautiful engine - these pictures are great.

Thanks for the compliment.  BTW I'd never heard of filing buttons either until I retired and started serious ME work, and I'm a time served fitter/machinist!
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on April 09, 2021, 04:29:30 PM
Terrific parts. Had to warn the shop elves off commenting on the titles...   :Lol:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Craig DeShong on April 10, 2021, 01:21:27 AM
I love these Victorian style engines  and yours John, is a beauty.  Really impressive work.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 10, 2021, 08:15:05 AM
My thanks for the kind comments. I've been asked why the pivot shafts are temporary, and here's the reason. It seems that some builders omit these little pins, but I will be making them. If I had thought about it I should have made the holes slightly smaller and used 1/16" brass rivets! :facepalm:

(https://i.imgur.com/MUr0DJx.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on April 10, 2021, 10:13:03 AM
Nice work on the governor, cant be long now until its running can it?
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 10, 2021, 11:11:31 AM
Nice work on the governor, cant be long now until its running can it?

I received my new spectacles today, so hopefully soon... :whoohoo:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 10, 2021, 06:34:09 PM
Governor Actuator Arm

I made this little beastie this affy. Once again, it's a complete fabrication! The stirrup is a little long as I misjudged the curved length, but what the hell, it looks nice enough...

(https://i.imgur.com/p8WszaV.jpg)

I cut the basic shape in the 2mm steel with the jeweller's saw. No milling and hacking for me!

(https://i.imgur.com/ZQ8Czzp.jpg)

Filing button for the centre boss.

(https://i.imgur.com/JqCRIAO.jpg)

Shaping the stirrup. Pure guesswork on the dimensions!

(https://i.imgur.com/AO1t24o.jpg)

Silver solder paste to join the two parts.

(https://i.imgur.com/2Xnp8tC.jpg)

Not quite to the drawing but it will do!

(https://i.imgur.com/x5gbWCj.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: steam guy willy on April 10, 2021, 07:22:16 PM
Hi this is looking really good and coming along wonderfully..great progress
Willy
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Roger B on April 10, 2021, 07:42:02 PM
Excellent  :praise2:  :praise2: There is so much detail. I am also a fan of filling buttons  :wine1:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 10, 2021, 10:57:09 PM
Excellent  :praise2:  :praise2: There is so much detail. I am also a fan of filling buttons  :wine1:

 :cheers:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: 90LX_Notch on April 10, 2021, 11:30:16 PM
That is very impressive hand/benchwork.  I would have probably drove myself crazy manually machining it from solid.  Iím definitely storing that away for future reference.  Well done.

-Bob
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 12, 2021, 04:42:02 PM
Electric Drive Tryout

I've taken a break from making tiny bits and as I've received the 24T XL timing pulley and belt I am now looking at the drive mechanism. I'll machine out the centre ridge on the intermediate pulley so the belt sits correctly and creates a decent drive surface. !'ll probably get a shorter belt to reduce the visual impact of the pulley.
BTW I know the eccentric rod is too long and I'll fix it!
John

(https://i.imgur.com/lFEK1GW.jpg)

You tube video here:
UKz7Ys2cHtw
Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on April 12, 2021, 04:54:37 PM
Super! I'm with you - I could watch it all day. Lovely motion.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on April 12, 2021, 05:14:35 PM
Beautiful!
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 13, 2021, 05:50:35 PM
Plinth Skirting and Setting Up the Flywheel Bearing Support.

The plinth is designed to be easily detachable, so an accurate and secure location is needed. I've used 10mm hardwood mouldings, glued to the planks with impact adhesive. The tape protected my nice maple planks from the adhesive spray!

(https://i.imgur.com/GD5HSiC.jpg)

Looking fairly neat, but it will look better when I do the granite face work.

(https://i.imgur.com/QpYn7GQ.jpg)

Now that the plinth is accurately positioned, I can set and install the outer bearing support. It is held down firmly by two CSK 2BA screws inserted underneath.

(https://i.imgur.com/IscrfLv.jpg)

Even though it looked right, when bolted up it needed 0.5mm shims to maintain concentricity. No problem to fix, as I used two spacer strips inside the enclosure, and I'll just shave that amount off them and all will be sweetness and light!

(https://i.imgur.com/ge4ITk3.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: samc88 on April 13, 2021, 09:01:21 PM
Nice work, the planking looks great

Sent from my G3121 using Tapatalk

Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 14, 2021, 04:55:11 PM
Drive System now installed. I've now got no excuse not to finish all those fiddly bits!

(https://i.imgur.com/gpPPOBs.jpg)

(https://i.imgur.com/glj7nGJ.jpg)

Short video here:
D697WGohAxs
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 14, 2021, 05:21:08 PM
Very nice system, and runs it at a good speed too.

Do you intend to ever run it on air?  Or is it only going to run with the electric motor?

Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 14, 2021, 05:47:02 PM
Very nice system, and runs it at a good speed too.

Do you intend to ever run it on air?  Or is it only going to run with the electric motor?

Kim

Hi Kim
I've engineered it to run on air: I fitted a Visconite piston ring to facilitate same. A club member suggested I get a sound module that goes 'chuff' in the right places...however, I'm happy just to watch it on electric power.
John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 15, 2021, 06:14:54 PM
I've given up on the fake quarried stone!

I couldn't get the effect I wanted so I've covered the plinth in some very thin maple veneer to give myself a nice virgin surface to work with.

(https://i.imgur.com/B7NDOsc.jpg)

I lightly sanded and oiled the rear panel and it doesn't look half bad! If I put some nice edging on it I might just run with it as it is...   :LittleDevil:
John

(https://i.imgur.com/tR6elFo.jpg)


Title: Re: Yet Another Stuart Major Beam Engine
Post by: propforward on April 15, 2021, 06:15:42 PM
Looks great - will make a very nice presentation for sure.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 15, 2021, 11:33:45 PM
Yes, it's always disappointing when your plan doesn't pan out the way you'd pictured. But this is going to look great too!

Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 17, 2021, 06:02:12 PM
A Different Approach.

I tried, without success, to emulate Jason's method, but failed miserably. However, I got myself some textured paint spray, and gave that a go, using Jason's method with a coloured base coat and thin masking tape. I'm quite impressed with the results.

Ivory emulsion base coat with three very thin coats of the stuff otherwise it goes 'gloopy' and joins together!

(https://i.imgur.com/ZkDooTy.jpg)

Here are the test cards. My white 0.7mm POSCA pen is a bit thin for this job, but you get the idea! I prefer the ivory with white grouting to the white base coat with black grout (which is Mr. Taylor's original colour scheme).

(https://i.imgur.com/2AAylF1.jpg)

(https://i.imgur.com/TTG33vQ.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 18, 2021, 05:23:39 AM
Wow!  That does look quite nice!  :ThumbsUp: :ThumbsUp:

Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 18, 2021, 08:39:40 PM
Better Fake Stone Blocks!
Two coats of white ceiling emulsion, three hours spent with masking tape, followed by a heart in the mouth spray session. I let the stuff dry in the sun for four hours, and gave it a coat of clear lacquer to 'fix' it and give the stone a bit of a 'glisten'!
Methinks It will do 🤩...


(https://i.imgur.com/Iw5GEn8.jpg)

(https://i.imgur.com/3xYKWRv.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Jasonb on April 18, 2021, 08:49:41 PM
That will do nicely Sir. :)

Proportions of stone and spacing of joints looks a lot better than the previous too
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 18, 2021, 08:53:06 PM
That will do nicely Sir. :)

Proportions of stone and spacing of joints looks a lot better than the previous too

Thanks Jason for the good advice. This very old dog still likes to learn new tricks! :NotWorthy:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on April 18, 2021, 09:08:28 PM
Came out great!  I used one of the other colors of that paint on a base once, interesting to use since it comes out chunky with the texture, great effect.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: gary.a.ayres on April 18, 2021, 09:32:18 PM
Looks great and really authentic.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Kim on April 18, 2021, 10:33:46 PM
Very nice looking!  You should be pleased with that!  :cheers:
Kim
Title: Re: Yet Another Stuart Major Beam Engine
Post by: joe d on April 18, 2021, 10:46:54 PM
That came out great!  I may well steal that idea.

Cheers, Joe
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Dave Otto on April 18, 2021, 11:48:58 PM
Looks great!
Nice work!

Dave
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 19, 2021, 08:13:48 AM
Thanks for the kind comments. I bought a grey paint marker to do the grouting but the bare white undercoat looks just fine. Non-one was more surprised than me when I removed the masking tape! :whoohoo:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 19, 2021, 07:47:33 PM
Display Base and Plinth Completed I can now get on with the rest of the fiddly bits!

Edges planed. Four 'Hockey Sticks' produced on the Proxxon FET saw from a piece of Mahogany and mitred on my new bench sander.

(https://i.imgur.com/d6Iy3e2.jpg)

Where would we be without cheapy tools!

(https://i.imgur.com/U6nOMqV.jpg)

Sanded and oiled. Well pleased with the result.

(https://i.imgur.com/lVwsIdd.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Don1966 on April 21, 2021, 01:40:45 AM
Very nice work...... :Love:


 :cheers:
Don
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Craig DeShong on April 21, 2021, 02:57:02 AM
 ;D#
Looks great!
Nice work!

Dave

Iím with Dave.   :ThumbsUp:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Roger B on April 23, 2021, 08:06:47 PM
Magnificent  :praise2:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: AVTUR on April 24, 2021, 05:58:10 PM
I must take a good look at your stone making technique.

AVTUR
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 28, 2021, 04:57:44 PM
Governor Assembled

Well, I stopped looking for the lost stirrup and made another one! I also went for pivot pins instead of the more often seen 10BA screws: I just have to make the fixture for drilling the 1/32" holes in the right place...
Progress!
John

Silver soldering paste for the stirrup join.

(https://i.imgur.com/XMFV8pe.jpg)

(https://i.imgur.com/KAL4Ghy.jpg)

(https://i.imgur.com/NyDNQKu.jpg)

(https://i.imgur.com/NVQDxde.jpg)

Title: Re: Yet Another Stuart Major Beam Engine
Post by: RReid on April 28, 2021, 05:25:28 PM
Very slick.  :ThumbsUp:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: crueby on April 28, 2021, 07:35:01 PM
Looks great! Very nice proportions and finish on everything.   :popcorn: :popcorn: :popcorn:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 29, 2021, 07:49:05 PM
Governor Valve Links

Our caravan comes out of storage tomorrow so I had to finish the governor! The links are straightforward, but like many model engines, are well over scale and need to be reduced somewhat. For example, the butterfly valve link rods are specified 3/16", so in full size that would make them nearly 2" in diameter, so they are now only 1/8" diameter and to me they look much better!! The same applies to the adjuster, both in thickness and in length.
Some progress pics.


Using a 'Frog' to hold the boss onto the arm

(https://i.imgur.com/hxY09Cu.jpg)

You can see that the solder paste leaves very little residues to clean up. Damned expensive but worth every cent!

(https://i.imgur.com/p83RdJ9.jpg)

A self centreing four jaw chuck is dead handy for these jobs.

(https://i.imgur.com/kKv2YUl.jpg)

My home made bending machine makes light and accurate work of the link rods.

(https://i.imgur.com/rsm3L7P.jpg)

Looking quite a picture now!

(https://i.imgur.com/qfv0Bg4.jpg)

(https://i.imgur.com/jxv1nuK.jpg)

(https://i.imgur.com/IsyXpPK.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Johnmcc69 on April 29, 2021, 08:09:19 PM
 :ThumbsUp:
 Nice work!

 John
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Admiral_dk on April 29, 2021, 08:30:57 PM
Agree that your finished link look very much to scale  :ThumbsUp:

Quote
Our caravan comes out of storage tomorrow so I had to finish the governor!

WHAT .... are you going to leave us hanging here in suspense  :o     ;)

Per
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on April 29, 2021, 08:43:45 PM
Agree that your finished link look very much to scale  :ThumbsUp:

Quote
Our caravan comes out of storage tomorrow so I had to finish the governor!

WHAT .... are you going to leave us hanging here in suspense  :o     ;)

Per
.
Er, yes, as I have to keep the REAL governor happy some of the time!😇
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Admiral_dk on May 02, 2021, 11:10:58 PM
Quote
Er, yes, as I have to keep the REAL governor happy some of the time!😇

 :lolb:

Ok on a more serious not - as these things are to do with respect for the other half - it can't be any other way - enjoy the trip  :cheers:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on May 07, 2021, 09:24:21 PM
A Quick Escape from the chores!

While waiting for my caravan floor refurb to dry out I had a look at the crank case. It's a solder or rivet job, but if you have a 3D printer then this is what you do...

Printing the prototype cage in PETG. I have some black on order so I won't have to paint it.

(https://i.imgur.com/P2IrPMJ.jpg)

Shaping the stainless steel insert.

(https://i.imgur.com/JQyZLnq.jpg)

Quite a nice fit!

(https://i.imgur.com/YdloruZ.jpg)

That's what I call BLING!

(https://i.imgur.com/OBetBra.jpg)

(https://i.imgur.com/OEGxmK9.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on May 19, 2021, 05:08:40 PM
We Are Connected!

I managed a couple of hours in the workshop today as we've postponed our caravan holiday for a few days until the storm passes through.

Thanks to a knowledgeable friend I now have what I think is a neat solution using XT30 connectors. I'm using a multi-voltage adaptor which also drives my barbeque spit, so I've left the various plugs on it for the time being. BTW the 4mm set screw holding the wheel on is temporary!

(https://i.imgur.com/sUDTY6O.jpg)

(https://i.imgur.com/aLSnGKt.jpg)

(https://i.imgur.com/HFZ3ZGL.jpg)

(https://i.imgur.com/yBWunAl.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on May 30, 2021, 06:51:51 PM
I did a few hours on the beast as the caravan is now ready for the Lake District trip. There's still some studs and the pump links to make and, of course, the parallel motion, but it's nearly there and looking quite nice!   :)
John

(https://i.imgur.com/98nOdWT.jpg)

(https://i.imgur.com/k2txecn.jpg)

(https://i.imgur.com/aVMogN0.jpg)
Title: Re: Yet Another Stuart Major Beam Engine
Post by: derekwarner on May 31, 2021, 01:05:27 AM
Superb John.........[just one point if I may........the 'asbestos' type lagging on the steam pipes would in most cases be shown in white].....

Gloss white is great....any oil drips wipe off  :facepalm: without staining a flat white surface].....sets the plant off very well  :ThumbsUp:

Derek  :cheers:
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on May 31, 2021, 08:21:01 AM
Superb John.........[just one point if I may........the 'asbestos' type lagging on the steam pipes would in most cases be shown in white].....

Gloss white is great....any oil drips wipe off  :facepalm: without staining a flat white surface].....sets the plant off very well  :ThumbsUp:

Derek  :cheers:

Hi Derek, and thanks for your input. I was intending to paint the lagging white, but as I've used waxed lacing cord I have to be a bit circumspect over the method in order to get the paint to stick! I will make a test piece and report back...
John
 
Title: Re: Yet Another Stuart Major Beam Engine
Post by: Don1966 on May 31, 2021, 11:29:24 PM
That is looking awesome JohnÖÖ  :Love:



 :cheers:
Don
Title: Re: Yet Another Stuart Major Beam Engine
Post by: ettingtonliam on June 04, 2021, 12:11:11 PM
Not necessarily. The asbestos was quite often painted a dark colour, maybe because it was going to get dirty anyway, and also to stop it fraying.
Title: Re: Yet Another Stuart Major Beam Engine
Post by: simplyloco on June 04, 2021, 12:21:51 PM
Not necessarily. The asbestos was quite often painted a dark colour, maybe because it was going to get dirty anyway, and also to stop it fraying.

Agreed. I made a test piece and it didn't look right: the paint accentuated the sharp edges of the cord.  The unpainted lacing cord fits well with the black/bright theme, so I'll leave things as they are.
Thanks for the inputs.
John