This report pertains to engine/airframe/drive train dynamic interface problems experienced by helicopters and the methodology used to avoid dynamic interface problems. The problem of low torsional frequency of the engine/airframe/drive train dynamic system that results from the design philosophy of using a stationary main rotor mast enclosing a separate 'floating' torque drive shaft is addressed. The use of supercritical shafts and vibration isolators are described and mobility methods to preclude engine/airframe vibration problems are discussed.


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    Title :

    Engine/Airframe/Drive Train Dynamic Interface Documentation


    Contributors:
    J. F. Needham (author) / D. Banerjee (author)

    Publication date :

    1978


    Size :

    61 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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