The plane takes up to a 4.0 hp engine and a o.s. 160 2stroke glow puts out 3.7, I don't think it would be under powered. And like I said before I can get it for $259, I can't find a gas engine for any less than about $350. I also only did one elevator servo so the engine can't weigh more than 3 lbs. unless I change it to dual and patch the hole where the push rod comes out.