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.
Engine/Airframe/Drive Train Dynamic Interface Documentation
1978
61 pages
Report
No indication
English
Aircraft , Jet & Gas Turbine Engines , Helicopters , Helicopter engines , Helicopter rotors , Transmissions(Mechanical) , Airframes , Drives , Torsion , Vibration , Dynamic loads , Interfaces , Stability , Turboshaft engines , T-63 engines , T-63-A-5A engines , H-6 aircraft , OH-6A aircraft , H-64 aircraft , YAH-64 aircraft , T-700 engines , T-700-GE-700 engines
Engine/airframe/drive train dynamic interface documentation
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