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Thread: Building a Seaclipper 20 trimaran

  1. #36
    Join Date
    Dec 1999
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    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    Here's a view of the complete swing-wing system temporarily installed on the boat to check the geometry. It works!



    For more details visit the construction blog: http://seaclipper20.blogspot.it

  2. #37
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Today we assembled the whole boat to test the aka system with the amas on. It worked!



    For more details visit the construction blog: http://seaclipper20.blogspot.it

  3. #38
    Join Date
    May 2015
    Location
    Port Elizabeth, South Africa
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    337

    Default Re: Building a Seaclipper 20 trimaran

    It's looking good!
    Do you use a bush or bearing at the aka hinge point?

  4. #39
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Thank you! The pivot bolt has a diameter of 12 mm. The plans specify to drill an oversize hole (15 mm dia) and to coat it with several layers of silica thickened epoxy to reduce the diameter to 12 mm. The same is done for all those bolt holes in the aka system.

  5. #40
    Join Date
    Dec 1999
    Location
    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    Deck seats completed. We're about to start the fairing/painting phase. Photo below.

    For more details visit the construction blog: http://seaclipper20.blogspot.it
    Attached Images Attached Images
    Last edited by pippo; 10-25-2017 at 09:03 AM. Reason: attached photo

  6. #41
    Join Date
    Dec 1999
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    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    We've started washing and scrubbing everything to remove the blush.
    Question: would epoxy primer be enough to fill and fair the fabric weave, or should we use epoxy/microspheres first?

  7. #42
    Join Date
    May 2009
    Location
    Fort Worth, Texas, USA
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    2,422

    Default Re: Building a Seaclipper 20 trimaran

    Plain epoxy will work fine.
    But filled epoxy will work easier. Might be a little cheaper.
    Microballoons will sand easier.

    Too bad you didn't fill immediately after laminating down the glass. Takes less work.

  8. #43
    Join Date
    Jun 2007
    Posts
    840

    Default Re: Building a Seaclipper 20 trimaran

    Quote Originally Posted by pippo View Post
    We've started washing and scrubbing everything to remove the blush.
    Question: would epoxy primer be enough to fill and fair the fabric weave, or should we use epoxy/microspheres first?
    Epoxy/microspheres/fairing compounds for sure. Primer is for small scratches and such. Don't forget to re-coat the faired surfaces with neat epoxy.

  9. #44
    Join Date
    Dec 1999
    Location
    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    Should I sand before, or would epoxy adhere on (clean) cured epoxy with no problems?

  10. #45
    Join Date
    May 2009
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    Fort Worth, Texas, USA
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    Default Re: Building a Seaclipper 20 trimaran

    If you haven't filled the cloth with resin, you can't sand because you will just sand into the cloth.
    Epoxy or epoxy with microbaloons will stick just fine without sanding, if you have water scrubbed away any possible blush.
    I've done it that way several times and never had a problem of the 2nd coat of epoxy coming off.

    To keep from sanding into the cloth, I have found that I need to put down 3 extra coats of epoxy to smooth out the surface of the cloth, and to give enough thickness to sand the surface flush. That means I do 3 instead of 2 fill coats.

  11. #46
    Join Date
    Dec 1999
    Location
    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    Thanks, very useful. Actually our cloth is quite light. We have laminated only 1 layer of 160 g/sq.meter except on the bottoms where we have two layers. It feels quite smooth already...

  12. #47
    Join Date
    Jun 2012
    Location
    Salem, MA
    Posts
    155

    Default Re: Building a Seaclipper 20 trimaran

    Very nice all around. Boat looks quite spacious for a 20'er. John and Jim do such interesting things - years of making mistakes Jim would say

    Curious about how wide that bottom panel is at it's widest? ... and what ply thickness for that?

    Congrats on doing a good job on this great little design. And thanks for sharing the build pics.

    Cheers,

  13. #48
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Thanks tom151. To give you an idea, the daggerboard slot is 5 cm wide, so the bottom should be around 45 cm wide at its widest point. The bottom thickness is 12 mm for the vaka (central hull) and 10 mm for the amas (floats).

  14. #49
    Join Date
    Apr 2017
    Location
    Lilburn, Georgia, USA
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    287

    Default Re: Building a Seaclipper 20 trimaran

    Bravo! You've gotten a huge amount done in "just" 600 hours! Thanks for posting here.

  15. #50
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Thank you Chris. Actually we could have cut that time quite significantly with a larger workspace and a few more power tools. The problem is that those 600 hours are spread along 4 years! Unfortunately, due to other commitments, we can work at the boat only on saturday mornings.

  16. #51
    Join Date
    Dec 1999
    Location
    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    A little update: many things happened, but we are close to finish.

    The two amas, finished and set apart:



    The complete aka system, painted:



    Graphite coat on the vaka bottom:
    :


    Details on seaclipper20.blogspot.com
    Last edited by pippo; 11-13-2020 at 06:26 AM.

  17. #52
    Join Date
    Feb 2006
    Location
    Pennsylvania
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    9,245

    Default Re: Building a Seaclipper 20 trimaran

    Great. I'm looking forward to seeing the launch.
    -Dave

  18. #53
    Join Date
    Jan 2003
    Location
    New Zealand's Far North
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    10,265

    Default Re: Building a Seaclipper 20 trimaran

    Looking good!
    There is nothing quite as permanent as a good temporary repair.

  19. #54
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Last sunday we gave the vaka hull a second coat of primer. On the port side of the hull something strange happened:



    Any idea? On the starboard side nothing happened.

  20. #55
    Join Date
    Jun 2007
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    840

    Default Re: Building a Seaclipper 20 trimaran

    How thick was the coat of primer? Multiple thins coats are much better than one or two thick coats.

  21. #56
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Quote Originally Posted by Dusty Yevsky View Post
    How thick was the coat of primer? Multiple thins coats are much better than one or two thick coats.
    I didn't measure but it is quite thin, spread with a roller... That was the second coat

  22. #57
    Join Date
    Dec 1999
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    Matera, Italy
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    281

    Default Re: Building a Seaclipper 20 trimaran

    Today we completed painting of the vaka hull.



    Details on seaclipper20.blogspot.com

  23. #58
    Join Date
    Dec 1999
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    Matera, Italy
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    Default Re: Building a Seaclipper 20 trimaran

    Today we completed painting!



    Details on our blog: seaclipper20.blogspot.com

  24. #59
    Join Date
    Dec 2003
    Location
    Sound Beach, NY
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    4,596

    Default Re: Building a Seaclipper 20 trimaran

    Nice!

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