844. Helicopter Mechanical Power Transmission


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L R Burroughs: 844. Helicopter Mechanical Power Transmission. 1970.



Helicopter power trains have increased greatly in size and complexity since the days of the reciprocating engine rotary winged aircraft. This paper summarizes the history of Sikorsky Aircraft in the power transmission field from 1939, when Mr. Sikorsky first flew his VS-300, to the present turbine powered aircraft. In addition, the design of the drive system of a large current production helicopter is reviewed together with the test programs conducted to develop the system components as well as qualify them for high service intervals (TBO’s). The paper also discusses areas of weight savings incorporated in this system as well as those areas to be considered in future designs.


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