To: Grey Area
“It's a language thing. Helicopter pilots, aerodynamicists and engineers call the COLLECTIVE angular displacement of the blades coning and CYCLIC changes are called flapping. Why not join us on earth and speak our language instead of inventing your own designed to contradict everything anyone says”?
Response:
In order for the blade to cone they must flap up on the horizontal hinge or if they are of the elastomeric persuasion they flap upward on the theoretical flapping point. So in this case, coning = flapping.
With cyclic input flapping takes place and the disc for whatever reason tips in the direction of cyclic movement. This produces cyclic flapping (up and down) and the cyclic flapping alters the coning angle. So in this case, flapping = change in cone angle.
They are all interrelated and one could not exist without the other.