Possibility of ascertaining ground speed by echo of sound is investigated; it is suggested that instrument be designed to measure time taken in flight between emission from airplane of sound impulse at angle to vertical and return of that sound to plane after reflection from ground. (See also - discussion n 1714 Mar 31 p 364-5)


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    Title :

    Sound speed -- Ground speed


    Additional title:

    Aeroplane


    Published in:

    Aeroplane ; 66 , n 1706


    Publication date :

    1944


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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