Vibration Measurements on the Rotor Shaft of the UH-1M Helicopter.
FRANKFORD ARSENAL PHILADELPHIA PA
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This report describes a program of in-flight vibration measurements carried out on a platform mounted atop the rotor mast on the UH-1M helicopter. Results of a real time analysis of the data are presented which reveal that a low level of vibration exists at that site making it a good location for the future placement of fire control instrumentation. A mechanical impedance study is also presented which shows that much of the high frequency present in the acceleration-time histories is a result of resonances in the tested platform. Author
- Fire Control and Bombing Systems