Ianwood said: Any prop that is a CF copy of the stock prop is a almost guaranteed to be problematic. The stock blade works well because it flexes. It has an aggressive pitch and the flex helps to keep it from losing laminar flow in turbulence and hard maneuvers. Take the flex away and you have a prop that is too aggressively pitched for the P2. I had a flight where I ran my p2+ into a tree branch. The p2+ immediately took off! pretty much straight up ( about 300 feet up) and away. I was sure I was experiencing a fly away moment. I turned the Tx off and the copter was fighting real hard to come home. I finally got it to about 30 feet over head and it just laid over to one side and crashed in my neighbors yard. When I picked it up the front port blade was missing about a half inch of its blade. I found the piece across the street from where it crashed at the tree it hit. The p2+ was really out of whack and unbalanced . I'm sure the imu was really struggling to compensate for this damaged prop. My though is that maybe some of these fly aways are due to prop failure, I don't know "losing laminar flow" due to fatigue or using aftermarket product and if the prop fails maybe she just can't overcome the aggressive pitch. Thought?