Pretty sure the base of this hot air engine on ebay was something else in a former life - looks like it says 'Britool' on it and the only thing I can think of that it vaguely resembles is a bottle jack. Any other ideas?
I used to have a pair of big 'Britool' screw jacks, might still have them somewhere, not that style but a confirmation that they were involved in selling (rebadging?) that sort of thing at one time.
The only bits that looks as if they could perhaps have had anything to do with Ky-Ko are the 'A' frames - and even those lack the housings at the top to take the ball bearings that manufacturer used. I think if any of the engine came from a commercial source at all, then it could have been one of the casting suppliers for the ET Westbury Heinrici model:-
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most of it appears to consist of very much 'parts of the moment', to pinch Charles Hudson's fine phrase originally used to describe the constuction of many small power IC engines.
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