dave
in the other tread you talked about blades in a vacuum, but in a vacuum or not the rotor axis must be changed to get precesion.
the mast or its hinges have nothing to do with it, they have there own precesion.
to change the axis we use pitch to put an up and down force on the blades,this over comes inercia and the disk starts to move but because the axis is changing, gyroscopic precession will TRY to take the movement ahead in rotation. a little cyclic will stop this happening.
i recon that if you on the ground with the rotors spining you might be able to notice it if you pushed the cyclic forward then hold that atitude. while the rotors are coming down they might be infront of the input but when they stop at the bottom it should be lined up with the input
