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Thread: Build Log: IOM

  1. #1
    Join Date
    Nov 2006
    Location
    Northern VA
    Posts
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    Default Build Log: IOM

    IOM 681

    Graham Bantrock designed hull "Vivid"

    What started out as 2 blocks of Dow Corning 4" thick insulation foam. Is now a male plug. Thanks to a good friend for his computer and CAD/CAM/CNC machine, he working on a goth plug.

    my plan is to do what I've done on the Albacore(bilge rat) 6,4,2 ounce glass

    I just finished a hull for a 1920's powerboat(Augusta) using the same glass method. and the bare hull prior to finish sanding/paint is 10.4 ounces... and its 38" long

    being that the iom hull is much skinnier and not nearly as much free board... getting the bare hull with no deck close to 225-250 grams should not be a challenge.

    need to order some more glass before I start glassing though...hate to run out...
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    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  2. #2
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    Default Re: Build Log: IOM

    had enough glass for Vivid Hull #1....
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    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  3. #3
    Join Date
    Jun 2008
    Location
    L.A.(Eagle Rock) California
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    56

    Default Re: Build Log: IOM

    What would be an ideal weight for a bare IOM hull ?

  4. #4
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    Default Re: Build Log: IOM

    I've been seeing a complete hull with deck and fittings around 500 -800 grams... I figure if I can come in at 225-250 for the hull, adding the deck and fittings should put in the 500-600 gram range...

    old info, but data is data..

    http://www.anderswallin.net/wp-conte...et2003july.pdf

    I put in the transom and bow tonight. so I should have some pics and weights of the bare hull tomorrow..Fingers are still sticky...
    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  5. #5
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    Default Re: Build Log: IOM

    ..................
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    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  6. #6
    Join Date
    Aug 2011
    Location
    Quebec, CANADA
    Posts
    108

    Default Re: Build Log: IOM

    Good and fast work Marc. Thank you for taking the time to share this build with us.

    I am puzzled. How did you come up with a nice and smooth closed transom and bow hull from your opened ends hull? Maybe your pictures are just too low-res to understand your work. I imagine that you preformed the bow and cut the transom out of a plat f/g plate. But your joints seem so perfect!

    Sylvain

  7. #7
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    Default Re: Build Log: IOM

    Sylvan,

    I'll take some closeups this afternoon. it is not nearly as purty as you think... i used some painters tape to close up the ends from the outside and than laid up 3 layers of glass from the inside.. I then used some west 105/206 with some micro light filler 410 on the inside to as a fillet. I will need to mix some west with the low density filler 410 for the outside to fair the joints. the bow joint will be covered with a bumper. have not cut the bumper yet...

    in all honesty getting the hull shape is usually the hardest part, but having someone who has access to nice equipment has made life a bit easier and a lot cleaner. having to sand the foam is one of the bigger PITA's

    235 grams

    keel fin, keel bulb, keel trunk....the fun really begins...
    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  8. #8
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    Nov 2006
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    Default Re: Build Log: IOM

    bow and stern....see not real purty when you look close...the stern will fill and blend nicely. not sure about the bow...it may get cut out and redone...
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    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

  9. #9
    Join Date
    Apr 2011
    Location
    Maryland
    Posts
    113

    Default Re: Build Log: IOM

    Looks like work has slowed a bit..

  10. #10
    Join Date
    Nov 2006
    Location
    Northern VA
    Posts
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    Default Re: Build Log: IOM

    unless you want pictures of sanding dust... : ) holidays have slowed me down a bit.

    I have 3 dinners in the next three days to prep for..

    I do have the deck plug ready to lay up. I was hoping to have another hull to lay up at the same time....but someone is slacking in that department...

    Maybe when you come over for the club meeting we can lay it up...
    Marc

    S1M 1981
    Victoria 81
    RG65 181
    IOM 81, 681, 881

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