Torsional mode suppressor

Details Torsional mode suppressor Torsional mode suppressor

F - Mech Eng,Light,Heat,Weapons

02

C

341/71, 341/38.1

F02C 9/28 (2006.01) B64C 27/00 (2006.01) G05D 1/08 (2006.01)

Patent

CA 1209670

TORSIONAL MODE SUPPRESSOR Abstract of the Disclosure: Damping of a helicopter rotor drive train, the drive train including the free turbines of a gas turbine engine propulsion system, the aircraft main and tail rotors, and associated shafts and gears, is accomplished through active modulation of the fuel flow to the engine gas generator. The fuel flow is varied such that a transient torque will be developed by the free turbines which is opposite in phase to drive train resonances.

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