Re: Has anyone considered trying using something like this?
Gore is absolutely correct about these miniature engines.
There is a man here in Colorado who builds them. He has all kinds from 7 cylinder radials to 1/4 scale size Chevys and Offys. They all run and sound great but he freely admits that they don't produce enough 'umph' to power anything. They are only novelties and aren't meant to be a power source for any vehicle. This for the exact reasons GoreWound states above.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"