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Peter - Retired Engineer

Theseus Horizontal Steam Engine (3/4" Bore 1" Stroke)

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Peter Benning18/02/2016 20:17:16
10 forum posts
8 photos

I'm getting close to finishing this steam engine (Which I started in 1959-60!! - Is this a record?).

What should I use for a piston ring/seal and I can't find a flywheel - 4 1/4" diameter to fit a 5/16" crank.

Any help or advice appreciated

JasonB19/02/2016 07:27:00
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25215 forum posts
3105 photos
1 articles

Graphite Yard is the traditional material and is a good today as it was when you started the engine, can also be used in the rod glands.

Perseus was the cast version of Theseus so the flywheel from that can be used, will clean up to about 4 1/8" and the hub is plenty large enough for a 5/16" shaft

 

Both can be purchased from Reeves

Edited By JasonB on 19/02/2016 07:27:28

Neil Wyatt19/02/2016 08:43:19
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19226 forum posts
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86 articles
Posted by Peter Benning on 18/02/2016 20:17:16:

I'm getting close to finishing this steam engine (Which I started in 1959-60!! - Is this a record?).

Welcome to the forum Peter.

Somehow I doubt it

Neil

Harry Wilkes19/02/2016 09:44:05
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1613 forum posts
72 photos

Hi Peter and welcome !

H

MW19/02/2016 10:48:48
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2052 forum posts
56 photos

Hi and welcome!

Michael W

John Rudd19/02/2016 10:57:09
1479 forum posts
1 photos

Posted by Peter Benning on 18/02/2016 20:17:16:

I can't find a flywheel - 4 1/4" diameter to fit a 5/16" crank.

Any help or advice appreciated

Hi Peter,

Have you thought about making your own flywheel from a cast blank?

Macc models will supply a suitable piece...

Windy19/02/2016 11:00:01
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910 forum posts
197 photos

Brings back happy times at Acomb Secondary Modern School when our metalwork teacher let me make Theseus.

It's a grand feeling when you first have it running I also made a simple boiler at school for it and was always cadging methylated spirit from the woodwork teacher.

H & S seemed to be non existent then a time of life that made me interested in all mechanical things.

Just seen you require a flywheel the one I found was from Stuart Turner don't know if still available.

Edited By Windy on 19/02/2016 11:02:53

Peter Benning19/02/2016 12:14:25
10 forum posts
8 photos

Hi all,

Thank you for your quick responses. Not sure if I have to respond to individual posts, but I'll try all this time...

Thanks JasonB; I have never heard of Grafite Yard, so will check on the link and I did need it for the rod glands as well. For the flywheel - a complete or just a rough cast will do.

Thanks Neil: I have been reading your magazine (MEW) for the last few months. I used to discribe myself as a "real" engineer - Now I'm not so sure, having seen and read the articles discribing amazing engineering skills!

Hi Windy, yes I went to Secondary Modern School in Harwich (1957 -62) and half day metalwork lessons were a joy and set me up for a Halton Apprenticeship.

Now approaching 70 (next month), I thought I better get a move on to finish this steam engine!

Peter

Bazyle19/02/2016 13:30:53
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6956 forum posts
229 photos

He was just spinning a story to string you along angel 2

but I'm impressed with his telepathic abilities to know what you are building.

It's nice that Reeves include some advice on the relevant page.

Edited By Bazyle on 19/02/2016 13:35:36

JasonB19/02/2016 15:00:53
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25215 forum posts
3105 photos
1 articles

What they don't tell you is that the yarn can also be unraveled to get smaller strands which are idea for use in glands

The perseus casting is just a rough sand casting so you can machine it as required, these are two of them

.

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