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The Grondin a Naiade Class Submarine of 1904 (MMI December 2014) EmptyToday at 4:10 am by merriman

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

    david f
    david f
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    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 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 Sun Dec 15, 2019 5:40 am