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1/20th Scale Traction Engine

The design of a miniature traction engine

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Roger Best06/01/2021 21:27:12
216 forum posts
31 photos

Good progress, amazing stuff.

If you take a front-on view of the Steam Wagon next to your engine I am sure we will see the difference in proportions, especially if you take the body off the Wagon.

noel shelley06/01/2021 22:36:50
379 forum posts
9 photos

Nice work Nigel ! Bassette Lowke did a set of drawings in1.5 scale in the late 40s, I have a set. If they would help PM me. They are very detailed. Noel

Roger Best17/01/2021 18:01:33
216 forum posts
31 photos

cool that looks great.

Roger Best17/01/2021 21:05:03
216 forum posts
31 photos

It is very much a first-off. There has to be a good bit of process development and "does it look right". In such a case three attempts is good. many people need three attempts to make a part with full instructions and published tips. smiley

Roger Best02/02/2021 20:57:40
216 forum posts
31 photos

Looks great, amazing actually for something so small.

A row of rivets and a scored line will disguise the common plate.

Sorry - no idea about pumps.

Harry Wilkes11/02/2021 18:20:35
avatar
1054 forum posts
64 photos

Looking good

H

Roger Best12/02/2021 20:17:55
216 forum posts
31 photos

Always a good idea to check the proportions...and generally admire. angel

Steviegtr12/02/2021 20:19:45
avatar
1911 forum posts
253 photos

Great work so far. Keep it up. yes

Steve.

Nigel Graham 222/02/2021 21:35:49
1071 forum posts
16 photos

Fine work there!

Aluminium inserts for PB - I'll try to remember that.

That flywheel's spot-on.

I don't think you've had to lift the motion excessively. The top of the firebox is a bit on the thick side but not that much above the barrel, and the cylinder saddle will compensate for some of its thickness anyway.

I may be mistaken but I think the engine in the photo behind yours is a single-crank compound. Are you following that or making a single-cylinder engine? If the latter your cylinder-block will be proportionately a little bit less tall.

I don't suppose you are the first to be caught by things like someone putting an axle in the way of the fire-door. They would! Many traction-engines have either the axle or a motion-shaft not actually in its way but above it, and some seemed to have been designed to make access right awkward. At least yours is below the door.

I've certainly fallen into my own design traps many times. There are plenty of bits on my steam-wagon that are second, third... mods to overcome mistakes I had not foreseen maybe 10 weeks - and often years - beforehand.

Roger Best22/02/2021 21:40:52
216 forum posts
31 photos

smiley great progress.

I would recess the top of the firebox. Is there boiler under it at that point?

Craig Brown 222/02/2021 21:51:32
35 forum posts
9 photos

Starting to take shape now, really looks the part 👍

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