DYNAMICS OF COUPLED FLAP-LAG MOTION BY THE HELICOPTER ROTOR BLADES

摘要

Small oscillations of isolated stiff blade in the rotation and flap planes about the steady-state motion of the rotor blade in horizontal flight and boundaries of instability of these oscillations, the so-called chord flutter, are considered. The method of determination of the main rotor chord flutter critical rate in forward flight is presented. Blade torsion is taken into account by means of a flapping compensator kinematic operation.