Bike powered aircraft
Motorcycle engines in aircraft are not new at all. In my misspent youth, a couple of us bought a 1935 Aeronca C-3 (called a 'flying bathtub') that needed a recover job and some other work. The engine that powered that plane was on built by JAP (for James A Preston, I think) Machine Works, Ltd, in England, and it was designed for one of their motorcycle powerplants. They also built singles and V-twins.
A year later, we bought a 1937 Aeronca K with a blown engine, also one built by JAP but called an Aeronca E-113 engine built under license. We got it because we had a spare engine that came with the C-3.
Many of those aircraft were converted to more reliable C-65's for more power and parts availability.
So, a Hog engine would be a good one - parts are easy to find. Just follow one down the road....
Man, was this a while ago.....:lol: