Flight and analytical methods for determining the coupled vibration response of tandem helicopters
Description:
Chapter one presents a discussion of flight-test and analysis methods for some selected helicopter vibration studies. The use of a mechanical shaker in flight to determine the structural response is reported. A method for the analytical determination of the natural coupled frequencies and mode shapes of vibrations in the vertical plane of tandem helicopters is presented in Chapter two. The coupled mode shapes and frequencies are then used to calculate the response of the helicopter to applied o…
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Date:
1957
Creator:
Yeates, John E., Jr.; Brooks, George W. & Houbolt, John C.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department