A friend of mine gave me his Phoenix Sukhoi SU-31.46 as a starter airplane. But it HAD a gas engine, and he and I want to convert it to electric. My question is: What size electric motor do I need to get this 6-pound airplane into the air? What size and pitch of prop would work best? I have a 450-class electric helicopter, but am sure that nothing is large enough for this thing! Anybody have any suggestions?