Helicopter transmission systems
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United States of America Patent
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Oct 30, 1984
Grant Date -
N/A
app pub date -
Mar 29, 1983
filing date -
Apr 8, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A helicopter transmission system is disclosed in which drive from three engines is transmitted to two output channels each of which is divided by dividing means to drive two output pinions meshed with a common combining gear rotationally fixed to a sustaining rotor drive shaft. Balancing means are provided to balance the torque transmitted by the respective pairs of output pinions and, in the described embodiment, the balancing means comprise a plurality of meshing spur gears arranged with one of the spur gears drivingly connected to one of the engines and a further two of the spur gears are drivingly connected respectively to the two output channels. Conveniently, a further one of the spur gears provides a power take off to an anti torque rotor drive shaft.
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