SN 2001 Ballast System

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  • SquamInboards
    Senior Member of PLANETNAUTIQUE
    • Sep 2005
    • 397

    • Squam Lake, NH

    • '82 2001 '84 2001 '86 2001 '98 NSS '87 American Skier

    SN 2001 Ballast System

    So I'm putting in my composite stringers on this '82 2001 project and I'm axiously awaiting the opportunity to build my own ballast for the boat. As it stands now the ballast is as follows:

    - 2x v-drive tanks
    - 1 Bow tank
    - 2x or 4x hull ballast to run between the stringers

    I'm putting in a new belly gas tank to make room for the v-drive so most of the center section of the hull between the stringers will be taken up, leaving the sections under the floor for ballast tanks. One concern is that should anything be faulty it will mean tearing up the floor to fix. The ballast fittings will be accesible elswhere but if a weld on the tank were to go it would be a huge pain.

    The issue: What plastic materials to use for the tanks and what welding technology to use. I have been doing some research and have decide to build the tanks from 1/4" PVC sheet. The v-drive tanks are square and fairly straight forward however the stringer tanks will have to be heated in place to form to the hull. I need to know what the best process is for welding the PVC in this situation? From what I understand there are hot air welders and injected welders, ultrasonic is not really applicable for this. If possible I'd like to get my hands on an injection welding system. I'm hoping someone has some thoughts or experience on the topic.
    How 'bout a little reverse action...
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