Machine comprises upper propeller revolving in normally horizontal plane and propeller in parallel plane 7 ft. below. Each propeller is 51 ft. in diameter. Propellers revolve in opposite directions. (See also - no. 11 Nov 22 1920 pp. 295-297, 4 figs.)


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    Title :

    The Hewitt-Crocker helicopter


    Additional title:

    Aerial Age


    Contributors:

    Published in:

    Aerial Age ; 12 , n 12


    Publication date :

    1920


    Size :

    3 pages


    Remarks:

    1 Fig.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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