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Face gear 7




Transmission for helicopter rotor (Lewis Research Center, Cleveland, Ohio, USA).

Two horizontal engines (violet) transmit torques to vertical yellow shaft that is connected to the rotor through a planetary gearbox (not shown). The system apportions torques equally along multiple, redundant drive paths thereby reducing the stresses on individual gear teeth. Face gears help forgive error in manufacturing and alignment, thermal and vibration changes for the meshing parts.




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