I was recently flying my Dynam Peaks biplane and mid-flight the prop and spinner flew off.
Luckily, I was able to land the plane but it was a hard landing. The gear ripped out of the foam. The back of the gear tore into the bottom part of the wings and the metal landing bar was warped.
I checked the spinner and I could not have tightened the nut up anymore than I did.
There were grooves in the motor shaft from where the spinner flew off. Has anyone else experienced this problem. I was not doing any 3D flying - just normal flight.