AlanTheBeast
Well-Known Member
I use to not unfold the props and let the motor start up take care of it. But now I never fold, and it seems to extend their longevity.
I always unfold the blades as straight as practical, seems like good airmanship to me.
I suspect that they pivot slightly during rotor acceleration (especially at start), as the torque would be very high compared to the drag on the blade but that centripetal force would correct that soon after.