A study has been conducted to define possible modifications to the OV-1 aircraft to reduce its aural detection distance. This effort involved documenting the noise characteristics of the airplane, devising modifications to reduce the noise, estimating the reduction in detection distance, and evaluating aircraft performance as a result of these modifications. It was found that the main noise source on this aircraft is the propeller and hence modifications only to the propeller and the propeller drive system are proposed. Modifications involving only the propeller are noted to involve no increase in weight but they result in only a modest decrease in aural detection distance. In order to obtain substantial decreases in aural detection distance, modifications involving changes both to the propeller and the engine-propeller gearing are required. (Author)


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    Titel :

    Noise Reduction Studies for the OV-1 Airplane


    Beteiligte:
    D. A. Hilton (Autor:in) / A. B. Connor (Autor:in) / W. L. Copeland (Autor:in) / A. C. Dibble (Autor:in)

    Erscheinungsdatum :

    1975


    Format / Umfang :

    68 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Reduction of airplane noise

    Engineering Index Backfile | 1930


    Noise reduction studies for the U-10 airplane

    Hilton, D. A. / Connor, A. B. / Hubbard, H. H. et al. | NTRS | 1975


    Noise reduction studies for the OV-1 airplane

    Hilton, D. A. / Connor, A. B. / Copeland, W. L. et al. | NTRS | 1975


    Noise Reduction Studies for the U-10 Airplane

    D. A. Hilton / A. B. Connor / H. H. Hubbard et al. | NTIS | 1975