you said > This theoretical 'yoke plane' is the 'tip path plane'
thats all i was trying to say, that the blades never flap seperately from the spinning axis (yoke plane or what ever) on a teetering system.
i know how the delta hinge works, if a blade flaps up it would normaly decrease pitch and maybe lead. but on the main rotor, pitch is there for a reason, so it will have to be rigged so it doesnt reduce pitch, just provide a leading hinge. so it might as well be a normal lead hinge.
you say its all ready used on some helicopters, i just cant work out why it is needed? doesnt cyclic control the flapping perfectly? or is it for the spring effect?
what about the weight, that is thrown to one side when a blade leads, how is it balanced on multi blade helicopters?
