Engines > Your Own Design
Baldrick - A Two Cylinder Single-Acting Rotary Valve Engine
Michael S.:
Good progress. I'm very curious to see how it develops.
Michael
PaulR:
--- Quote from: Michael S. on February 25, 2026, 06:41:53 PM ---I'm very curious to see how it develops.
--- End quote ---
Me too!! :Lol:
Today I finished the essential parts of the fiddly middly bits. Next will be the bearing/valve block although I've yet to decide exactly what that's going to look like :headscratch:
Sanjay F:
I like the design and build as you go methodology :ThumbsUp: :popcorn:
PaulR:
--- Quote from: Sanjay F on February 26, 2026, 06:26:53 PM ---I like the design and build as you go methodology :ThumbsUp: :popcorn:
--- End quote ---
Can be a bit scary but touch wood no major design flaws have materialised yet!
Today I made a flywheel and was about to make the connecting rods when I found I have no 1/4" square brass so went for round bar instead :Lol: Just need to mill the flats on the overlapping ends and they'll be done. I'm still waiting on the copper tube but as it's coming by Royal Mail it's probably delayed by them having to change horses on the mail coach and deal with our 18th century quality roads. Utter crap.
PaulR:
Finished the connecting rods and made the shaft/valve. I milled part of the (longer) inlet slot in the vertical slide but finished it by file as it was chattering badly. I couldn't find a way to mount it for milling the narrower exhaust flat so I did that with two careful hacksaw cuts and some filing. Just need to drill the central exhaust hole and that's done. The copper tube finally turned up so now I need to tackle the last part, the bearing/valve block, which I still haven't quite decided on how to make.
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