for a park flyer, the entire idea is to be a park flyer. that's why they are electric. the gas engines that are small enough to fit in a park flyer are incredibly annoying. they sould like little flies buzzing around you. go electric. but, if you insist, get a STURDY park flyer and put a small r/c norvel engine in it. make sure it is r/c not c/l. c/l doesn't have throttle control. i wouldn'
t reccoment it though. for a smaller plane like that, a gas engine and the necessaries will weigh more than a small electric motor with lipolys