HELICOPTER COLUMN Russian patent published in 2000 - IPC

FIELD: flying vehicles; rotary-wing vertical takeoff and landing aircraft. SUBSTANCE: helicopter column includes main rotors with hubs of opposite rotation mounted on inclinable hollow axle through bearings. Inclinable hollow axle of hinge is connected with tubular stagger mounted on helicopter case. Hubs of main rotors are interconnected by means of reduction gear. Hinge of inclinable hollow axle is located inside axle in center of aerodynamic pressure of main rotor coaxial system. Located inside tubular stagger of inclinable hollow axle is shaft with cardan joint of equal angular velocities Kinematic center of cardan joint of equal angular velocities is aligned with center of hinge of inclinable hollow axle. EFFECT: enhanced reliability of helicopter and safety of flight. 7 cl, 7 dwg