An analytical investigation into the possible improvement of aircraft propeller performance that may be obtained by employing high strength filamentary composite materials to modify the elastic characteristics of the blades was conducted. The orientation of the individual fibers with respect to the axis of the blade was chosen to induce a coupling between the centrifugal force acting on the blade and the shearing strain in the plane of the blade cross section. The shearing strain changes the pitch of the blade as the rotational speed of the propeller is varied. This change in pitch is then optimized to broaden the band of flight speeds over which the propeller operates efficiently.Results for the analytical model indicate that the efficiency of non-controllable pitch propellers may be improved by 5% at the design condition and as much as 20% at off-design conditions. Furthermore, the results indicate a significant increase in the band of flight speeds over which the propeller operates efficiently. In addition, a 5% increase in efficiency throughout the applicable range of flight conditions was determined for controllable pitch propellers employing composite blades in place of rigid blades.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Aeroelastically Tailored Propellers


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    National Business Aircraft Meeting and Engineering Display ; 1977



    Publication date :

    1977-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Aeroelastically tailored wing design

    BROWN, JR., L. / PRICE, M. / GINGRICH, P. | AIAA | 1980


    AEROELASTICALLY TAILORED PROPELLERS FOR NOISE REDUCTION AND IMPROVED EFFICIENCY IN A TURBOMACHINE

    WOOD TREVOR HOWARD / RAMAKRISHNAN KISHORE | European Patent Office | 2015

    Free access

    Supersonic flutter of aeroelastically tailored oblique wings

    WEISSHAAR, TERRENCE / BOHLMANN, JONATHAN | AIAA | 1987


    Supersonic flutter of aeroelastically tailored oblique wings

    WEISSHAAR, TERRENCE A. / BOHLMANN, JONATHAN D. | AIAA | 1989