Quickest one off build method

Discussion in 'Multihulls' started by rob denney, Aug 22, 2007.

  1. rob denney
    Joined: Feb 2005
    Posts: 763
    Likes: 122, Points: 43, Legacy Rep: 436
    Location: Australia

    rob denney Senior Member

    G'day,

    I have posted some photos in the Photos section of the Yahoo Harryproa group of the windward hull being built at the KSS workshop last weekend. http://au.groups.yahoo.com/group/harryproa/

    Pretty incredible. Derek has managed to get a compound curve from the flat foam panels, in a similar way to tortured ply. Differences are that the foam can be much thicker (we used 12mm/half inch, could have been any thickness), more compounding can be achieved as the foam will stretch and it is quicker and easier. The hull was glassed inside below the waterline the following day, and outside below the waterline the day after. The deck is being infused tomorrow. The cabin and other bits the following day.

    Regards,
    Rob
     
  2. zigzag
    Joined: Aug 2007
    Posts: 47
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    Location: Hong Kong

    zigzag Junior Member

    tortured foam

    Rob, I thought Derek's Technique was to lay down the glass, resin then the foam then glass on inside to make the panels. You mention glassing BWL on the next day. Is that the bottom seam only as I thought the technique offered instant fair hulls?
     
  3. rob denney
    Joined: Feb 2005
    Posts: 763
    Likes: 122, Points: 43, Legacy Rep: 436
    Location: Australia

    rob denney Senior Member

    G'day,

    KSS has only ever provided automatically fair topsides. The area below the waterline used to need athwartship cuts every couple of feet, then each piece was bent into the fair keel line before being glassed and faired inside and out. The fairing was minimal (seldom more than the glass overlap thickness on our hull) and because it was a curved surface was easy to do. This was a very quick and easy way to build a hull.

    The new technique eliminates the cuts. The hull we built is extremely fair, but will still need a bit of bog over the glass joins. It is even quicker. It is also lighter as you do not have to double glass the cut area.

    regards,

    rob
     
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