Thanks for the reply. I'l check the paper work that came with the plane and see what it says. Maybe a new prop wouln't hurt anything either. The one I have is sort of bent. The plane came with two but one is broken already. The Piper J-3 I have is the one advertised as the best trainer for $69.95 I believe. It's one of those cheap RTF's. Never mind cheap. It I can master this I can move on to something better.