Ah! Perhaps I should have thought of that. Thanks Jason, I'll have a look at it again tomorrow. Keith.

Thanks, Jeff, I had a look at Ray Hasbrouck engines this evening. I didn't find any pics of an identical engine but I agree, it has a lot of similarities. I found one picture of an incomplete engine on eBay which is very similar to the engine Hugh started to build. I suspect Hugh hadn't finished making the parts for the crank axle, as (a) there's only one crank web on each unit (b) the crankshaft is too short to connect anything to it.

I''m very grateful for the information you've both given me, as I now know a bit more about it, but I don't think it's worth prolonging the discussion as I don't plan to do any work on the engine, there are more pressing jobs as I am moving a Super 7, milling machine and drill press from my late father's workshop to my newly built workshop. I think I'll put these bits back in their box to slumber for a few more years…. and I've got a complete ST Victoria engine (a real beauty) that another departed friend built, which I would dearly like to run, so I might be back with questions about that in due course. Keith.

Thanks, Jason, for the observation about the single crank web and also the drawings, which are both a close match for the engine. Maybe it will be worth doing some more work on it in due course. The drawing answered one question in my mind, which was the diameter of the big end bearing in the crankshaft, versus the diameter of the hole in the crank web. Obvious, really, now that I've seen the drawing. Keith.