RE: Balancing a spinner trick
On a Diamond Dust with a YS 45, I threw one blade at the hub on a 9X9. I tell you, that was about the loudest sound coming from the sky I ever heard. I killed the engine immediately and landed. The only thing was the engine was loose. Just tell me how violent it was to back off four nylock nuts that far!
With a DF powered Dust, I was testing grey pylon props. Every one I tested lost 3/8" off the tips of both blades at the same instant, usually during an abrupt turn. It didn't seem out of balance, It just wound up higher and dropped air speed.