Correct me if I am wrong, but if we look at the case when the helicopter R22 has an engine failure and is falling like a brick since the RRPM felt below 80%, if you then apply negative pitch this does not mean that you get negative g. But changing the pitch of the blades to negative could eventually recover the RRPM above 80% and you could continue your autorotation instead of falling like a brick to the ground..
Last edited by salomonteneighty; 3rd Nov 2017 at 20:24.