Experiments of Peter Cooper Hewitt and Francis Bacon Crocker who are said to have produced helicopter which has developed lift of 4000 lb. with motor of 200 hp.


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    Title :

    Again the helicopter?


    Additional title:

    Sci. Am.


    Contributors:

    Published in:

    Publication date :

    1919


    Size :

    2 pages


    Remarks:

    3 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :