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* THE FORUM FOR ALL THOSE INTERESTED IN BUILDING AND OPERATING MODEL SUBMARINES *



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For further details of any events shown here also see the "Shows and Events" section on the forum

*STOP PRESS* Coronavirus. A lot of Clubs have already cancelled all activities. Check carefully before you plan any travel

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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Bournville Sub Day, Sunday 13th September

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Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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

    david f
    david f
    david f
    AMS Treasurer

    Posts : 2104
    Join date : 2010-11-10
    Age : 69
    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 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.
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