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I downloaded this PDF file from the web, I don't remember where.

This is my re-engineer autocad file of a 3 cylinder rotary stem engine, I try to be as accurate as possible, however there is always that last minute tweek to the real thing that I may have forgot to translate back to the drawings so please don't hold it against me if I made a mistake.

I took standard plans I found online and scaled them up 3x. I also re-engineered quite a bit to add bearings and bushings and make the engine more serviceable. The pistons are aluminum with teflon rings, the cylinders are 304 Stainless, connecting rods and center hub are Titanium with oilite...