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    The Grondin a Naiade Class Submarine of 1904 (MMI December 2014)

    david f
    david f
    david f
    AMS Treasurer


    Posts : 2268
    Join date : 2010-11-10
    Age : 72
    Location : Cumbria
    • Post n°1

    The Grondin a Naiade Class Submarine of 1904 (MMI December 2014) Empty The Grondin a Naiade Class Submarine of 1904 (MMI December 2014)

    Post  david f Sat Dec 13, 2014 9:30 am

    An interesting article here describing The French Grodin sub built by Rene Lefevre.  Interesting construction - all metal.
    The Naiades were interesting in that they were the first use of electric propulsion motors in combination with i/c engines. (The Hollands??)
    Rene uses a central ballast tank emptied by butane gas. He uses  a pendulum type level controller.
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