Rolling Moments
G'day guys,
A while ago there was a thread refering to loss of tail rotor thrust and how it effects helicopters in general. At one stage there was a comment made by myself and others regarding the rolling moment when a helicopter starts to spin in the hover. I attributed this to the drag created by the vertical stabiliser being below the level of the rotor head, causing the fuselage to tuck under and roll the helicopter over to the point where rotor thrust will not be able to support the 'weight' of the helicopter etc etc.
I think it was Nick who mentioned that the rolling moment is made around the Centre of Gravity. I am after clarification of this as I can't get my head around it.
Any help on this ?