Evidence suggesting that noise of full-scale helicopter rotors results mainly from unsteady flow; sound-pressure data and spectra for test conditions where gear train, engine and other propulsion system noises are minimized; tip speed (100 to 900 ft/sec) and disk loading affect radiated noise level.


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    Title :

    Noise characteristics of helicopter rotors at tip speeds up to 900 feet per second


    Additional title:

    Acoustical Soc America -- J


    Contributors:


    Publication date :

    1960


    Size :

    3 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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