Engines > Restoration of Model Engines

Completion of Allchin Traction Engine (hopefully)

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Charles Lamont:
Yes, silver soldering is probably better, but it may be difficult to do if the firebox is otherwise complete. IIRC the side and front stays are normally silver soldered before the back plates go in. One problem is with the oxygen supply to the flame, though a 'cyclone' burner is often recommended - £30 and up for a Sievert one. By the way, what sort of crown stay(s) does it have?

Twizseven:
There are a pair of longitudinal crown stays made in 13-gauge copper sheet.  These are rivetted together to form a central girder.

likorplf:
Bearings are crucial for smooth operation and longevity of the engine. Given that all the bearings for your Allchin traction engine are already complete, it’s important to inspect them thoroughly for any signs of wear or corrosion from the long period of inactivity. For ball or roller bearings, check the cages and raceways for wear. If any bearings feel rough or have noticeable play, they may need replacing.

springcrocus:
Hello Colin,

I, too, inherited a rather rusty Allchin and did a comprehensive write-up of the work on another forum, Model Engineering Clearing House. I had to finish a part-made boiler and the side stays were fitted without the nuts. The boiler was silver soldered throughout, although I had to resort to comsol to fix a couple of weeps, and it successfully passed it's shell test a few years ago. I have yet to complete the engine and raise some steam as other projects have taken precedence.


If you want to take a look, THIS LINK will take you there.

Regards, Steve

springcrocus:
No it won't because I can't edit the link.  :Mad:
Fifth article down in the Road Steam section.
Regards, Steve

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