It's not the positive or negative pitch which is the issue, 3D, I think it's the fact there's anything other than flat pitch on.. .. .Pitch = drag, and whether pitch is negative or positive wouldn't really help, the rotor system will slow down. It seems to me to be a case of having as little drag as possible to aid RPM recovery.. .. .As an aside, I understand naval Lynxes have a negative pitch setting to help holding onto the deck.. .. .( I've just thought - given my name I bloody well hope I'm right ! )