FIELD: aeronautical engineering, landing parties and space engineering. SUBSTANCE: each blade of main rotor consists of two main parts: rigid end lift surface with controllable flap and flexible spar wound on drum which is connected with main rotor hub through clamp and lag hinge and operates as flapping hinge in working position of blade. Lag hinge makes the drum track blade position in winding the spar, thus providing for proper laying on drum. Flap is connected with arm of bell crank secured on drum cheek though rod, bell crank with centrifugal weight and control rope running inside spar. Second arm of this bell crank is connected with wobble plate through roller, link and rod. Bell crank suspension axle and roller axle form blade flapping compensator. Laws of motion of main rotor blades in working modes do not differ from those of existing main rotors. EFFECT: enhanced reliability. 1 dwg
