Please don't slander anyone's name on this website.

My personal opinion is the loose prop and engine happened after the initial start up. My recent adventure with my CAP 232 27% resulted in the same thing. And I put the thing together and I'm certain everything was tight. It just came loose after running the initial time. But mine came loose in the air.

I'm sure if you are ready to fly a gas plane you should be able to figure this stuff out. If you can't, then you might not be ready for a gas plane yet. The big planes are much different than the little ones. Much more serious.

Thanks
Barry

PS: Hope you do well with your knee replacement. Good luck.