Re: Radial engine 750cc - I want one :)
Radial engines and rotary engines are two different things... in one the casing spins round a fixed crank and pistons... in the other the casing is fixed and the crank is free spinning.
Both will impart some gyroscopic motion from the rotational forces of the pistons and associated hardware spinning at speed. The only engine that doesnt do that is something like the DB610 - which is two handed engines geared into one... and they have their own problems
"....Look, no pedals... *thud*..." The mating call of the motorized-biker.
"RetroEagle" - 32cc Two-Stroke, Piped. 35mph on #13 gear. Reversed stem with springer fork.