DEVICE FOR DAMPENING TORQUE OF HELICOPTER

摘要

FIELD: aviation. SUBSTANCE: device has blades 10 of rotor 7 located in transversal passage 6. Blades 10 have angular distribution in azimuth stipulated by sinusoidal law: , where thetan - is angular position of "n" blade red successively from arbitrary beginning of readings; b is number of blades; m is integer selected from 1 to 4 which does not coincide with figure "b" selected from 6 to 12 and Δtheta is more than or equal to Δthetamin which is selected within range of from 1.5 to 1 radian. EFFECT: reduced radiation of noise due to distribution of acoustic energy over entire spectrum of frequencies. 20 cl, 7 dwg