My flying buddy put his LA 40 in a pPhoexnic low wing sonic, which is for 25-32 engines. It really flies great, and the LA is a light 40, so didn't cause any proglems. The engine has never quit while flying, and the sonic is quite aerobatic. The LA 40 has gotten a bad rap since it is not a power house. Put it in the right airplane though, and it is great.