Download drag for rotorcraft in hover and low-speed flight is a burden which significantly affects useful load, fuel, and payload. Reduction of the burden will enhance these aspects of rotorcraft and complement the forthcoming improvements in isolated rotor performance. Analyses and experimental data are available, though fragmentary, regarding gross drag, thrust recovery, and other characteristics which can be utilized to define interim rotorcraft design changes to reduce the burden. Eventually the experimental data and a comprehensive combination of rotor, rotor-wake, and potential-flow analyses can evolve to reduce the burden to an absolute minimum.


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    Title :

    Rotorcraft low-speed download drag definition and its reduction


    Contributors:

    Conference:

    Rotorcraft parasite drag; Thirty-first Annual National Forum ; 1975 ; Washington, DC


    Publication date :

    1975-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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