Results are reported of a NASA sponsored analytical investigation into the merits of advanced counter rotation propellers for Mach 0.80 commercial transport application. Propeller and gearbox performance, acoustics, vibration characteristics, weight, cost and maintenance requirements for a variety of design parameters and special features were considered. Fuel savings in the neighborhood of 8 percent relative to single rotation configurations are feasible through swirl recovery and lighter gearboxes. This is the net gain which includes a 5 percent acoustic treatment weight penalty to offset the broader frequency spectrum noise produced by counter rotation blading.


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    Titel :

    Technology and Benefits of Aircraft Counter Rotation Propellers


    Beteiligte:
    W. C. Strack (Autor:in) / G. Knip (Autor:in) / A. L. Weisbrich (Autor:in) / J. Godston (Autor:in) / E. Bradley (Autor:in)

    Erscheinungsdatum :

    1981


    Format / Umfang :

    35 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Technology and benefits of aircraft counter rotation propellers

    Strack, W. C. / Knip, G. / Weisbrich, A. L. et al. | NTRS | 1981


    Noise of counter-rotation propellers

    HANSON, D. B. | AIAA | 1985



    Acoustic interference of counter-rotation propellers

    Tam, C.K.W. / Salikuddin, M. / Hanson, D.B. | Tema Archiv | 1988


    COAXIL VESSEL PROPELLERS WITH COUNTER-ROTATION

    KLIMOV SERGEJ OLEGOVICH / ANTONENKO SERGEJ VLADIMIROVICH | Europäisches Patentamt | 2017

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