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

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    david f
    AMS Treasurer

    Posts : 1888
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    The Grondin a Naiade Class Submarine of 1904 (MMI December 2014)

    Post  david f on 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.

      Current date/time is Sat Sep 23, 2017 9:01 pm