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*2021 AND SOME EVENTS ARE BEING PROPOSED. Keep them coming and let us know the details! (amstreasure@googlemail.com)

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Model Sub Weekend, 28th, 29th August. Bluewater Parkway, Greenhithe, DA9 9

Bournville Sub Day. Sept 2021 is looking likely. More details TBA.

Barrow in Furness Regatta and Sub day. Maybe in Sept 2021. Details TBA.

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

    david f
    david f
    david f
    AMS Treasurer

    Posts : 2172
    Join date : 2010-11-10
    Age : 71
    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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