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    Title :

    Flight tests of the Sikorsky HNS-1 (Army YR-4B) helicopter ; Part 2: Hovering and vertical-flight performance with the original and an alternate set of main-rotor blades, including a comparison with hovering performance theory


    Contributors:

    Publication date :

    1945


    Size :

    15 S., [11] Bl


    Remarks:

    Ill., graph. Darst
    Originally issued April 1945 as Memorandum report L5D09a
    Digital preservation by Technische Informationsbibliothek (TIB) / Leibniz-Informationszentrum Technik und Naturwissenschaften und Universitätsbibliothek


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English