Calculations of rotational noise and vortex noise loudness levels at distances of 300 and 1000 ft were made for large number of propellers in forward flight of 50 to 200 mph and for engine ratings of 100 to 300 hp; results are presented in chart form.


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    Title :

    Propeller-loudness charts for light airplanes


    Additional title:

    Nat Advisory Committee Aeronautics -- Tech Note


    Contributors:
    Hubbard, H. (author) / Regier, A.A. (author)


    Publication date :

    1947


    Size :

    9 pages


    Remarks:

    57 Supp Plates, Bibliography


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English




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