IMPROVED EMERGENCY DRIVE OF COMMON PITCH WITH FRICTION CLUTCH AND METHOD FOR HELICOPTER Russian patent published in 2019 - IPC B64C27/58 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering, particularly, to rotor control systems. Common pitch emergency drive includes drive motor to create actuation force and drive lever mechanism, which directly engages lever of friction control, which is hingedly supported on handle of helicopter common pitch for application of actuation force directly to lever of control of friction clutch. Actuation force first disengages the friction control, and then reduces the adjustable pitch to the minimum position of the common pitch. Drive may include a clutch that slides relative to the output shaft to allow the pilot to overcome the actuation force using the common pitch control lever and to respond to the control engagement of the pilot friction. Otherwise, the clutch rotates together with the engine shaft to shift the adjustable pitch to the minimum position of the common pitch.

EFFECT: reduced weight and dimensions of emergency drive for control over common pitch.

15 cl, 5 dwg