Buccaneer 28 Trimaran plans.

Discussion in 'Multihulls' started by oldsailor7, Apr 17, 2010.

  1. bruceb
    Joined: Nov 2008
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    bruceb Senior Member

    No carbon?

    I don't think carbon is in the picture. We have very few "bigger boat" carbon masts in the US, and determining damage in a broken section is not easy. Aluminum is easy to inspect, and much more readily available. The four beam sections I need are about 37-40 lbs each in alloy, so there is not that much weight savings either.
    New alloy is available of course, but to the individual, the price is quite high, and I prefer an alternative.
    Bruce
     
  2. El_Guero

    El_Guero Previous Member

    Why not build a carbon mast?
     
  3. bruceb
    Joined: Nov 2008
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    bruceb Senior Member

    Carbon alternative?

    I have not attempted to build a carbon spar of any type, but I have done repairs on a few. For a one off mast, carbon, like most composite construction, is very labor intensive, and usually quite expensive. According to several experts that post on here, it is also very demanding of the design and the materials available. I have observed pros in a mast shop in Sydney turn one out fairly quickly, but they had lots of experience and had built their specialized equipment. Here in the USA, there are easier and less expensive ways to get a spar for most projects. In an area with less resources, a home built mast might make more sense, or be the only practical solution.
    B
     
  4. El_Guero

    El_Guero Previous Member

    Bruce,

    I saw a video about making your own carbon masts, and it was NOT difficult ....

    And if you used a home-made inner-structure to wrap the carbon around, you would have a very strong and fairly light weight mast. (wood, aluminum, or steel).

    I think.

    Wayne

    The video I watched. http://www.youtube.com/watch?v=A6Jz4_PpHLY

    The video was designed to release the carbon fiber, but you could design it to just wrap in place .... Especially if it was decent marine ply, or marine foam core.
     
  5. redreuben
    Joined: Jan 2009
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    redreuben redreuben

    El_Guero;
    Gig difference between a dinghy mast and a yacht like a 33' trimaran !
    Especially $$invested in materials.
    Note there is no part 2 to that video, I wonder if the mast came off the mandril ? :D
     
  6. bruceb
    Joined: Nov 2008
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    bruceb Senior Member

    33 tubes

    Does anyone here know the diameter of the "stock" (as designed) alloy cross beams of a Buc-33?
    B
     
  7. El_Guero

    El_Guero Previous Member

    True, but you can always use two masts instead of one.

    I am all about sustainability. It costs less to go with 70% sized masts instead of one full sized mast. They weigh less, and are easier to work with.

    If I wanted to go with huge mast and sail, I would go Oracle ....

    WAIT! I did go Oracle.

    :D
     
  8. oldsailor7
    Joined: May 2008
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    oldsailor7 Senior Member

    8" X 5 1/2" I will confirm that tonight when I get back to the mountains.
     
  9. oldsailor7
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    oldsailor7 Senior Member

    OK. Here is the Goss.
    B33.
    Crossbeams elliptical 8" x 5 3/4" x 3/16" wall
    203.2 x 146.1 x 4.8 mm 6061 T6 aluminium tube.
    Unsupported beam length between wing edge and inner float
    = approx 4' 10"
    Bruce, hope this helps. :D
     
  10. bruceb
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    bruceb Senior Member

    beams revisited

    Thanks Patrick. I have enough left of my beams to measure them- but just barely:( They have holes eaten through them where they were in contact with the wooden float saddles. I was interested in what was used on 33s that didn't use oval beams. I assume? that round pipe was used on some of the 33s.
    I finally got the rest of the beams off of the floats, now I can start repairing and rebuilding the 33.
    I will post some pics of the old parts soon.
    B
     
  11. Corley
    Joined: Oct 2009
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    Corley epoxy coated

    Excellent! Looking forward to following this rebuild.
     
  12. buzzman
    Joined: May 2011
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    buzzman Senior Member

    Yeah, ditto...better start a New Thread, eh, Bruce...??? :)
     
  13. oldsailor7
    Joined: May 2008
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    oldsailor7 Senior Member

    Quote:- "I was interested in what was used on 33s that didn't use oval beams. I assume? that round pipe was used on some of the 33s". Quote.

    Bruce, I don't think that anyone would use round tube s on the B33. Oval is not hard to come by. Just rolled from 7" tubing. That's how yours was done---by ALCAN.
    Because of the lateral forces on the beams the round tubing would have to be 8" Dia,
    which would be heavier and have more windage.
     
  14. bruceb
    Joined: Nov 2008
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    bruceb Senior Member

    rebuild the buc

    Thanks guys, I will start a 33 rebuild thread soon, but I will post some pics and details here that should be of interest to all buc builders :) Between my ply 24 and the glass/foam core 33, I have a lot of real world examples of what has worked and what hasn't over their 35 plus years in use.
    B
     

  15. oldsailor7
    Joined: May 2008
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    oldsailor7 Senior Member

    Good ONYA Bruce. Looking forward to it.
    Between your wood/epoxy B24 and your Foam/Glass B33, both about 40 yrs old there will be valuable information gained. :D
     
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