ORIGINAL: cficfiimei
Hi there. I am a flight instructor and I have played with an Aerobird Challenger for awhile. I had a student give me a .40 trainer that he had flown twice and crashed twice. I fixed it and I'm attempting to fly it. Here is the problem. The propellor keeps coming lose when i start it. It seems to happen when it is a little bit flooded. I'm using an electric starter and a plastic spinner that he gave me. I have tried a lock washer. And double nutting it seems to work but the second nut doesn't fit on all the way. Should this be loctited? Any help would be greatly appreciated
Welcome aboard. I presume you're a full scale flight instructor.
With that .40, one of my RC students had that happen with a prop he had never reamed. He had to wind it down the threads, to get it on the prop shaft. Then he would put the washer and nut on, but they would not provide adequate clamping force. The prop hub was tight on the threads. When I reamed it for him, and he tightened it down good, it never spun off again.
So, if the prop won't slip over the prop shaft, all the way to the backplate, without turning it like a nut... ream the prop.
Good luck,
Dave Olson