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

    The Springtime is coming !

    Is time for me to return to the Models construction after almost 1 year stoppage due to recovery from hernia operation.

    A lot of thinking and discussions about pros and cons for hard chine hull performances.
    I just drawn a new plan for a Class M and there is only one way to verify it.
    Here the picture about.

    Among this design, it happen to discover various painting decorations methods, like "stretch adhesive film" often used for car body, "Hydrographical paint" with plenty of subjects and "Swirling paint", my preferred.
    On You Tube plenty of demonstrations simply using above key words.

    The M picture is the result of a screen shot made on one of YouTube short film.

    Claudio

    Just a link out of many : https://youtu.be/nAmvavELsFw
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    Last edited by claudio; 02-19-2017 at 11:25 AM.

  2. #2
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    Default Re: "1290" Class M Hard Multi Chine Hull

    It may be of interest to watch this video : https://youtu.be/_CA0DR4GSQg.
    I will build my basin with glass-epoxy 150/160x50x50cm to dip the M hull

  3. #3
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    Default Re: "1290" Class M Hard Multi Chine Hull

    What a fantastic way to paint a hull. Will look forward to seeing your progress with this concept.
    Of course you do realize that there may be many model boat builders that will now get their hands dirty with "swirl". LOL

    Glad to see you active again Claudio, I missed seeing your drawing and building activities.

    Clark

  4. #4
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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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  5. #5
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Packing tape applied, one layer only.
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  6. #6
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Hi Clark,
    I'm just designing a basin support box that can be dismounted with the use a swim pool film. Unfortunately living in a flat I'd chosen the shower and missed the bathtub. Easy to put it back to the garage when not needed.

    Booth methods are interesting when I refers to Hydrographic painting and Swirling painting.

    For what concern the Class M model I changed from 5 to 6 panels chines because the draft and beam are smaller at 30° of heeling.
    BTW, the Hull Wet Area is very close to the one with round Hull.

    Expected more stability.

    Another simulation of swirling paint

    Cheers
    Claudio
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  7. #7
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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.

  8. #8
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Six panels chine shadows are cut and ready to be fasten with samba stringers
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  9. #9
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    Default Re: "1290" Class M Hard Multi Chine Hull

    Progressing with the template drawings in order to cut panels and successive bonding.
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  10. #10
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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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