HELICOPTER MAIN ROTOR Russian patent published in 2005 - IPC

FIELD: aeronautical engineering; main rotor systems of flying vehicles; remotely-controlled flying vehicles.

SUBSTANCE: proposed main rotor has shaft and hub, four blades secured in pairs on hub through feathering hinge at acute angle between pairs of blades and blade carrier with crank. Two pairs of servo-flaps with rods and carriers are connected with shaft through hinges. Wobble plate is mounted on shaft by means of universal joint and is provided with rotating and non-rotating rings. Slider mounted on shaft is movable along it and is provided with four differential cranks. Each crank is connected by its one arm with rotating ring of wobble plate and with carrier of servo-flap by its other arm.

EFFECT: increased load and thrust with no increase in hinge moments and forces in control system; reduced level of noise; enhanced arrangement of control components.

1 dwg