How passenger transport was soundproofed; three-bladed, geared, controllable-pitch propellers used to reduce noise at its source; matter of insulation; ventilation; yardstick of sound.


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    Title :

    Douglas -- Silent transport


    Additional title:

    Western Flying


    Contributors:
    Zand, S.J. (author)

    Published in:

    Western Flying ; 13 , n 9


    Publication date :

    1933


    Size :

    3 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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