Patent ID: 9193456
Filing Date: 2015-11-24
Classification: B64C,Y02T

Abstract:
1. A driven horizontal rotor of a rotary-wing airplane comprising a rotor axis and a plurality of rotor blades rotating about the rotor axis, the incidence angle of each of the rotor blades increasing and decreasing over each rotation of the respective rotor blade about the rotor axis, each of the rotor blades comprising: an elongated main body, the main body including: at least one flap, wherein the flap has a basic position in which it lies flat against the upper surface of the main body such that the flap follows the curvature of the profile of the upper surface, wherein the flap is swivel mounted to the main body in such a way that a reset force acts upon the flap, wherein the flap is designed to be passively swiveled by aerodynamic forces and inertial forces acting against the reset force about its swivel axis to raise the upper surface of the main body with increasing incidence angle of the rotor blade, and wherein the reset force acts upon the flap to reset it into its basic position.