Pardon my delay in response. Last Saturday morning my wife and I were washing the cars when she tripped over the hose and landed hard on our concrete walkway. She broke a piece off the top of her thigh bone (she has stainless steel hip replacements on both hips) and can't get around the house without a walker. I've been running all week trying to help her out around the house.
I have had had odd minutes here and there to search for plans that I might use to build something along the size of a 49cc/3.0 ci engine, including finding some surprising parts on eBay. The only model I can recall that gets close in displacement is something like the PMR Hit and Miss at 2.5 cubic inch.
While you were starting from experience with 50cc engines and knowledge of the field, I'm starting from almost complete ignorance. I don't think I have much of a chance of success with some plans or some examples. I am a retired engineer, but electrical - radio and radar designer for commercial aircraft. I haven't worked with engines much since the late '60s, early '70s.
Do you know of any books or other resources to fill this big hole in my knowledge?
