Adjustment means for helicopter rotor blade viscous damper

Details Adjustment means for helicopter rotor blade viscous damper Adjustment means for helicopter rotor blade viscous damper

B - Operations, Transporting

64

C

B64C 27/51 (2006.01) F16F 15/16 (2006.01)

Patent

CA 2060751

Abstraction of the Disclosure A viscous damper for a helicopter rotor blade having a stator member and a rotor member each having a plurality of flanges of different diameter defining cylindrical internal and external shear surfaces, respectfully, and a shear gap therebetween, one stator member internal shear surface having two diameters, the shear gap distances being proportional to radius, and a coaxial rotor member comprising two discs having outer cylindrical shaped shear surfaces forming a shear gap with adjacent stator member shear surfaces and one rotor disc being axially movable so that a variable portion of its shear surface is opposite both of the diameters of the stator member two-diameter internal shear surface. The stator member is of a material having a lower coefficient of expansion than the rotor member material to provide automatic temperature compensation. - 12 -

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