Spherical bifilar tuning pin bushing

Details Spherical bifilar tuning pin bushing Spherical bifilar tuning pin bushing

B - Operations, Transporting

64

C

244/15

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

Patent

CA 1037451

SPHERICAL BIFILAR TUNING PIN BUSHING 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 which otherwise would be transmitted to the helicopter fuselage. Improved tuning pin assemblies and cooperating tracking inserts for the absorber reduce the undesirable frictional damping heretofore encountered in bifilar absorbers by centering the pendulous elements of the absorbers relative to their support members and reacting forces normal to centrifugal force by permitting flapping movement of the bifilar mass in the vertical plane. -1-

243594

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