Bi-plane catamaran

Discussion in 'Multihulls' started by JPh, Sep 7, 2003.

  1. JPh
    Joined: Sep 2003
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    Location: Switzerland

    JPh New Member

  2. grob
    Joined: Oct 2002
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    Location: Cotswolds Waterpark, UK

    grob www.windknife.com

    JP,

    I agree with all that you are doing, I think twin rigs on a cat is the way to go.

    Make sure you keep talking to Richard Glanville of Freewing as I know his design is Patented, and you would not want to infringe his patent.

    Good luck

    Gareth
    www.fourhulls.com
     
  3. JPh
    Joined: Sep 2003
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    JPh New Member

    Hi Gareth,

    Thanks for your comments, I am in fact in contact with Richard and I would not use his material without his knowledge. We are still comparing solutions and costs will come in as a next step. Derek Kelsall and Richard are also in contact, so we should be able to find a solution together. I would like to have a furling boom because it would be easier to use and reef, main problem is they are heavier therefore dangerous when gibing. A balestron rig would in fact nicely counterbalance that tendency. Can I afford two of those?
    We will see what comes up in the next few months.
    Thanks again,

    Jean Philippe

    http://www.geocities.com/jp_br/
     
  4. OldYachtie
    Joined: Jan 2006
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    OldYachtie Junior Member

  5. frosh
    Joined: Jan 2005
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    frosh Senior Member

    Hi JP, bi-plane cat rigs probably have as many pros as cons. I read a detailed review of Schionnings " Radical Bay ". Masts were carbon and custom built with a large section down low and highly tapered. Could be quite expensive.
    The other main thing that I remember is that when sailing off the wind one sail can easily blanket the other suddenly reducing your effective sail area. The author tried to paint this in a positive light claiming that it was an easy method of depowering, or that it makes reefing easier by first blanketing the leeward sail, then taking it down. Make up your own mind however. The correct method of running a bi-plane rig is the way that that the high speed prototype, Yves Parlier's " Hydraplaneur" was rigged.

    http://www.seglermagazin.de/Orma-Termine-Parlier-mischt.3474.0.html
     

  6. OldYachtie
    Joined: Jan 2006
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    Location: near Seattle

    OldYachtie Junior Member

    Bi-plane sailors say that when beam reaching, you just let out the weather sail a bit more than usual, and haul in the lee sail a bit more than usual, and it sails just fine. If you visualize it in overview, it looks rather like one sail, with the maximum camber in the middle.
     
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