APPARATUS FOR COMPENSATING THE REACTIVE TORQUE OF THE MAIN ROTOR OF A HELICOPTER Russian patent published in 2023 - IPC B64C27/82 B64C11/08 B64C11/16 

FIELD: aviation.

SUBSTANCE: invention relates to the field of aviation, in particular, to designs of tail rotors of helicopters. Apparatus for compensating the reactive torque of the main rotor of a helicopter comprises a tail rotor mounted in the fin tunnel, with multiple blades, wherein a ring connected to said blades so as to be able to move radially and change the blade installation angle is installed at the ends thereof; a drive and a blade pitch control system. The rotor disk is divided into two parts by a shaped ring, wherein each blade of the rotor is divided into two parts with different coaxial axes of rotation. The root part of the blade is located between the rotor head and the inner side of the shaped ring with the tail parts of the rotor blade located on the outside thereof, wherein the axes of rotation of said tail parts pass through the root parts of the rotor blade, and the tail part of the blades is secured in the external shaped ring with the external part rotating in the shaped channel of the tunnel.

EFFECT: possibility of simultaneously creating a counter-directed thrust vector on a single rotor disk while setting different blade installation angles in different parts of the rotor disk, thus improving the controllability of the helicopter and lowering the level of noise and vibration.

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