Thanks everyone, especially you gus for the engine info but I believe the shaft is bent. I've pecked and shook everything again and can find nothing. The radio gear seems to be working like it should. It's not the lost plane that bothers me as much as not knowing what caused it. If I had made an obvious mistake like putting 2 rubber bands on, I would feel better. As it is I haven't learned anything. I'm afraid of using this radio gear in another plane.