stressed ply multihull

Discussion in 'Multihulls' started by captainsideburn, Apr 27, 2010.

  1. captainsideburn
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    captainsideburn Junior Member

  2. simon
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    simon Senior Member

  3. DarthCluin
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    DarthCluin Senior Member

    Actually Paul Fisher has designed a tortured plywood MOCRA compliant catamaran. The link is here:
    http://www.selway-fisher.com/YachtCats.htm#AT
    His plans are very reasonably priced too.
    Here are some pictures of one under construction.
     

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  4. captainsideburn
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    captainsideburn Junior Member

    yes I have looked at selway fisher's cat 254, it just doesn't seem to be a particularly modern design, and I do favor a trimaran, and simarly Kurt hughes 23' trimaran also looks dated.
    I'm wanting something more contemporary, that takes advantage of more modern hull shapes.

    BTW which boat is that you have pics for? and where did they come from?
     
    Last edited: Apr 28, 2010
  5. Gary Baigent
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    Gary Baigent Senior Member

    Early stages, under development, Scissoring Sid - 7.62 x 7.98metres - scissors to be trailerable, 1/4, 1/2 wing mast/soft sail 11 metre rig versions, light weight total platform constructed in tensioned ply, glass, carbon, 3 bunks.
     

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  6. captainsideburn
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    captainsideburn Junior Member

    ahh
    been keeping an eye on what you are doing there, but didn't realise you were going to use stressed ply, hurry up :p
    sounds very interesting, had a look at your stuff on small tris
     
  7. DarthCluin
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    DarthCluin Senior Member

    I think I found the pictures at SFD_builders_sailors, the Selway Fisher group on Yahoo. You have to dig, because there are a lot of pictures there. I have plans for the CAT 25, which is a 1983 design, however I think the 254 is more recent.
     
  8. Samnz
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    Samnz Senior Member

    just a quick look at the links seems like a very slow and weak method of getting the main hull shape. foam and glass would be a better option for this size and shape hull. Tortured ply floats say 4mm would be great for the floats tho, such as these ones I have just built http://crew.org.nz/forum/viewtopic.php?f=37&t=13308


    sorry I cant seem to attach an image
     
  9. captainsideburn
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    captainsideburn Junior Member

    ooh,
    that does look cool, do you have a link to the actual design?
     
  10. fhrussell
    Joined: Dec 2004
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    fhrussell Boatbuilder

    A couple of tortured-ply catamarans

    There were 100's of Tornados built of tortured-ply and the Rudy Choy catamaran, Machete, is a 40 foot tortured-ply cat.
     

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  11. fhrussell
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    fhrussell Boatbuilder

    One of the challenges in building with this method is that it is not quite exact. A trimaran would be an ideal boat for this method, with only one main hull.
     
  12. captainsideburn
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    captainsideburn Junior Member

    they are really cool photos, but I am looking for something taking advantage of modern design innovations
     
  13. Samnz
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    Samnz Senior Member

    no there is no design on paper it is all full size templates. We are looking into producing drawings for it tho.

    http://www.blairboats.com/demon-85.html

    This is the finished version.
     
  14. captainsideburn
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    captainsideburn Junior Member

    wow, that is one really nice looking boat
     

  15. Dan Cohen
    Joined: May 2010
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    Dan Cohen New Member

    The west epoxy guys had stuff in their book on diegning this way and that guy in austraila the developed glass foam off a table to thin hulls
     
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