Hi folk's ,so many questions. I will try to keep it short. Me and a friend (Willie) just bought Balsa USA 60" EEA BIPLANES (both used and crached). Both rebiult and ready for powerplants.One with 4 the other with 2 ailerons. Thinking OS 91 FS (non pumped).Grass field,no pants (yet) fly'n scale. Enough power? Nice to see old school enthusiasm! Thanks for any input, Rob