Can you identify these castings?

[norman valentineParticipant @normanvalentine78682]

[norman valentineParticipant @normanvalentine78682]

I have been given some castings for an interesting model. I do not know if they are all for the same model. I have assembled some how I think that they might go. Can anyone identify the model? Thanks.

[ZanParticipant @zan]

I think they are tubal cains engine – Tom Walshaw- the cylinder rotates in the central casting I seem to remember with a roller on the end of the piston rod. The cylinder rotates in the frame, fed by steam through its trunnions. Valve was driven by a fixed eccentric sheve with a rotating strap It was a published design perhaps 20 years ago in EIM or Model Engineer. A very neat and brilliant mantle shelf engine. Good luck! I seem to remember the machining of the frame was quite involved. A gyrations challenge ……..but I’m working from distant memories…..

[JasonBModerator @jasonb]

Look up Coomber Rotary engine

[Neil WyattModerator @neilwyatt]

My recollection is that the frame needs to be given just the right amount of play in just the right places – it isn't circular either, so you do need TC's description unless you want a lot of head scratching.

Neil

[Former MemberParticipant @formermember19781]

[This posting has been removed]

[norman valentineParticipant @normanvalentine78682]

Thank you very much for the quick replies. I will have to do some research to see if I can find the drawings.

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