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Thread: "1290" Class M Hard Multi Chine Hull

  1. #21
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Sanding of plug completed.
    A lot of very fine dust, hope the vacuum cleaner will not suffer too much !!
    Cleaning with dry tissue only. No water !
    Next, coverage with packing tape.
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  2. #22
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Packing tape applied, one layer only.
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  3. #23
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    Default Re: "1290" Class M Hard Multi Chine Hull

    While waiting for better weather conditions, lower RH, here a 'dual table' about Sail's & Rig Data used for a Class M model.
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  4. #24
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Before lamination and for precautionary reasons, I have applied two layers of Wax.

    Today I manage to laminate "Wet on Wet" 3 glass - epoxy layers.
    1 of 85g/mē
    2 of 105g/mē.
    Notice the second layers just laying on previous laminated one of 85g/mē without adding any epoxy.
    The 2nd layer is acting as a sponge absorbing the excess of resin like a "peel-off" tissue.
    No need to add too much resin, just what it is needed to cover the full surface.
    This is the way I use to keep the overall weight inside the rule of thumb : 50/50.
    Similarly for the 3rd layer.

    According to my calculations the hull surface is of 40.50dmē, therefore :
    (0.85g/dmē + 1.05g/dmē + 1.05g/dmē) x 2 for resin = 5.9g/dmē x 40.50dmē of hull = 238.95g .

    238.95g is the expected weight of the bare hull out of mold.
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    Last edited by claudio; 03-26-2017 at 12:44 PM.

  5. #25
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Removed the excess of glass-epoxy and let now cooking under the sun !!! Close to the Canal du Midi (construction 1666- 1681), and for those who like to knows more : https://en.wikipedia.org/wiki/Canal_du_Midi
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    Last edited by claudio; Yesterday at 06:47 AM.

  6. #26
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    Default Re: "1290" Class M Hard Multi Chine Hull

    the Sun is gone and cloudy and windy again !!

    Although only 24h are gone, being impatient, I decided to de-mold the hull with the help of tiny fiberglass blades and hull got away without problems.

    The Master is still perfect !

    The bare hull weight is 259g instead of 238.95g. Too much resin ? Probably yes but less then the budget allocation !

    Now is arrived the moment to draw and cut the hollow shadows to allow hull "setup" assembly.
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