Could someone explain why the effect of the earths rotation and the movement of air which is affected by that rotation (corriolis) is used to explain the lead/lag of a rotor blade during one cycle?
Main Rotor Blades are affected real or apparent by, Cconing, Lift, Drag, Density, Rotational speed, Surface area, Flapping, Pitch changes, Angles of attack, Profile (cross sectional design) and Bending. Tail Rotor Blades have addionally a Delta hinge.
My understanding is;-
When the rotors are turning at right angles to the rotor shaft and in still air, the forces on a blade are constant through one complete cycle.
Now introduce a forward cyclic command. This will cause the advancing blade to reduce pitch, reduce the A/A, reduce lift and therefore reduce drag. Does the blade velocity increase and therefore 'leads' due to the reduction in drag? Or because the blade has flapped down the radius has increased (coning angle decreased) that the blade slows down causing the blade to 'lag'?