DEVICE FOR DAMPENING TORQUE OF HELICOPTER Russian patent published in 1999 - IPC

Abstract RU 2138422 C1

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 θ_n - 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 Δθ is more than or equal to Δθ_min 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

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RU 2 138 422 C1

Authors

Anri-Zham Rishar Marz

Vensan Zhan Ljuk Rut'O

Zhij Lui Arno

Remi Ehlian Arno

Dates

1999-09-27—Published

1995-05-03—Filed