SYSTEM OF TWO COAXIAL ROTORS OF AIRCRAFT Russian patent published in 2019 - IPC B64C27/10 B64C27/54 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, particularly, to propellers of aircraft. System of two coaxial rotors of aircraft comprises reduction gear with two coaxial shafts, rotor bushings, screw control circuits, two swash plates and control mechanism of common and differential pitch of rotors. Swash plates of upper and lower rotors are not directly connected to each other. Swash plates of upper and lower rotors in control circuits of common and cyclic pitch of blades are made with possibility of axial movement and kinematically connected to each other by means of parallelogram-summing mechanism. Circular pitch differential control mechanism is used in circuits of longitudinal and transverse control of swash plates.

EFFECT: providing equal distance at all azimuths between ends of blades of upper and lower rotors in translational flight of helicopter, which makes it possible to bring together the rotors in order to improve aerodynamic properties of helicopter and reduce its overall dimensions.

1 cl, 1 dwg