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Mike Perron,     Coral Springs, Fl.,        mfprn01@netzero.net

ROTARY VALVE SCOTCH TWIN    1/11/2006

This is a rotary valve engine with exhaust through rear of crankshaft.
It has a .500 bore X .500 stroke, brass tubing used as cylinder liners.

    

I got the idea from two engines, the Double Scotch twin, and single cylinder Scotch engine plans.
Pistons are aluminum, with Buna-N, O-Rings for piston rings. Piston rod is 3/16" stainless Crank is mix of 1/4" stainless steel shaft supported in bronze bearing, .150 thick steel disk with 1/8" I.D. X 3/8" O.D. ball bearing driving aluminum yoke. Cylinder heads are also aluminum.1 1/2" steel flywheel.
It was fun to build and runs great. Might put in model boat someday.  That's why the mounting is as such.

 

Copyright 2006,  Florida Association of Model Engineers and engine builder as noted above, All rights reserved.