More than 300 individual noise certification levels were measured for propeller driven airplanes up to 5700 kg takeoff weight and for powered gliders in accordance with the rules and regulations as set forth in International Civil Aviation Organization Annex 16. Information on the airplanes, the engines and the propellers is provided as well as on the prevailing meteorological parameters and the operational parameters together with acoustic data. Of the latter, the measured A-weighted levels with their 90% confidence limit are listed, the performance correction is given and the certification level as well as the noise-limit are provided. Data are evaluated by plotting the measured A-weighted levels versus the helical blade tip Mach number.


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    Title :

    Collection and Evaluation of Propeller Aircraft Noise Certification Data


    Contributors:
    M. Ahlswede (author) / K. P. Anders (author)

    Publication date :

    1981


    Size :

    87 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English