Anhedral bifilar

Details Anhedral bifilar Anhedral bifilar

B - Operations, Transporting

64

C

244/15

B64C 27/32 (2006.01) B64C 27/00 (2006.01)

Patent

CA 1064455

ABSTRACT OF THE DISCLOSURE A multibladed helicopter rotor carries at least three bifilar absorbers which are tuned to eliminate in-plane vibrations of the rotor that otherwise would be transmitted to the helicopter fuselage. By drooping the radial support arms for the absorbers out of the plane normal to their axis of rotation, the resultant of the centrifugal forces acting on the pendulous elements of the absorbers and the weight of these elements acts normal to the axes of the tuning pins of the absorbers which minimizes internal frictional damping in the absorbers.

258310

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