Measurements of overall soundpressure levels and frequency spectra of noise emitted from 3-blade, 6.85-ft diam propeller; results are compared with similar results obtained from supersonic propeller having advance ratio of 2.2 and from modified propeller having advance ratio of 3.2 (see Engineering Index 1958 p 35 NACA -- Tech Note n 4059 and 4172 respectively).


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    Title :

    Noise survey under static conditions of turbine-driven transonic propeller with advance ratio of 4.0


    Additional title:

    NASA -- Memo


    Contributors:


    Publication date :

    1959


    Size :

    14 pages


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English


    Keywords :