LIFTING PROPELLER BLADE ASSEMBLY, AIRCRAFT WITH LIFTING PROPELLER AND DRIVING SYSTEM FOR FLAP OF LIFTING PROPELLER BLADE Russian patent published in 2015 - IPC B64C27/615 B64C27/72 B64C11/32 

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering, particularly, to rotary-wing aircraft designs. Aircraft includes airframe and main propeller assembly connected to airframe and containing multiple blade assemblies. The propeller blade assembly includes propeller blade, tilt flap section located lengthwise along propeller blade span, and flap section driving system containing linear drive. The linear drive is located inside propeller blade, functionally connected to flap section to rotate flap section around flap axis. The linear drive includes DC brushless motor, threaded shaft functionally connected to the motor, output piston functionally connected to threaded shaft via roller nut to convert rotary motion of threaded shaft into linear motion of output piston and multiple rollers located between the threaded shaft and roller nut and made of self-lubricating material.

EFFECT: higher reliability of drive operation under action of high centrifugal forces.

10 cl, 5 dwg