Two efficiencies have been introduced to facilitate the comparison of powered high lift systems for low approach speed and for acceleration after lift-off. The corresponding minimum thrust and total impulse required by an idealized unpowered wing are used as reference parameters. The efficiencies are shown as a function of installed thrust to weight ratio and minimum flight speed, non-dimensionalized by a reference velocity with dynamic pressure equal to the wing loading. Incorporated in the efficiencies are the effects of wing aerodynamics, engine thrust loss due to power extraction, duct loss and thrust recovery.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Thrust Efficiency of Powered Lift Systems


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Powered Lift Conference and Exposition ; 1987



    Publication date :

    1987-12-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of pneumatic thrust-deflecting powered-lift systems

    ENGLAR, R. / NICHOLS, JR., J. / HARRIS, M. et al. | AIAA | 1986



    Reciprocating Lift and Thrust Systems

    CAO YIDING | European Patent Office | 2020

    Free access

    RECIPROCATING LIFT AND THRUST SYSTEMS

    CAO YIDING | European Patent Office | 2020

    Free access