A field noise measurement investigation was conducted during the flight testing of an XC-142A tilt-wing V/STOL aircraft to define its external noise characteristics. Measured time histories of overall sound pressure level show that noise levels are higher at lower airspeeds and decrease with increased speed up to approximately 160 knots. The primary noise sources were the four high-speed, main propellers. Flyover-noise time histories calculated by existing techniques for propeller noise prediction are in reasonable agreement with the experimental data. (Author)


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    Title :

    Flyover Noise Characteristics of a Tilt-Wing V/STOL Aircraft (Xc-142A)


    Contributors:
    R. J. Pegg (author) / H. R. Henderson (author) / D. A. Hilton (author)

    Publication date :

    1974


    Size :

    24 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Flyover noise characteristics of a tilt-wing V/STOL aircraft (XC-142A)

    Pegg, Robert J. / Henderson, Herbert R. / Hilton, David A. | TIBKAT | 1974


    Flyover noise characteristics of a tilt-wing V/STOL aircraft (XC-142A)

    Pegg, R. J. / Henderson, H. R. / Hilton, D. A. | NTRS | 1974


    Forward Swept Tilt Wing V/STOL Aircraft

    SAE / American Helicopter Society / AIAA | British Library Conference Proceedings | 1997



    Forward Swept Tilt Wing V/STOL Aircraft

    SAE / American Helicopter Society / AIAA | British Library Conference Proceedings | 1997