My 28' Power Trimaran

Discussion in 'Multihulls' started by fluidformations, Jul 26, 2010.

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  1. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

    Hi there, here are some vids of my power tri I have been sea trialling..

    Stats are:

    28' Loa
    8' Beam
    6" Draft
    50 Hp short shaft Tohatsu 2 Stroke outboard gets 30 knots.

    I have a 60L Ballast tank well forward in the boat, but it is not yet plumbed in in these Vids.

    I have carried 5 adults with little compromise to ride/speed.

    http://www.youtube.com/watch?v=GySfUoiY4vo
    http://www.youtube.com/watch?v=fu0puXJvrfY
    http://www.youtube.com/watch?v=76OzaMIdq24
    http://www.youtube.com/watch?v=euB0ZhTJATM
     
  2. soffi
    Joined: Jul 2010
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    Location: Reykjavik, Iceland

    soffi Junior Member

    Nice looking tri! And the performance specs you posted are very good. What design is it?
     
  3. DHMzip
    Joined: Jul 2010
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    DHMzip Junior Member

    very cool. I would be interested in finding out more about this.
     
  4. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    =========================
    Very impressive! How does the boat do in bigger waves? Seems like an excellent design....
     
  5. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

  6. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

    Hi there, thought I'd add some pics...
    :cool:
     

    Attached Files:

  7. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    X Factor

    I'm curious about how you decided on the overall beam for the boat-what were your major consideration?
     
  8. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

    Hi Doug, I wanted to keep it around the 8' overall mark so i could legally tow it on a trailer where I live. This meant I could not make it as wide as I would have liked though. But I optimised the design with the armas, so that at its optimum speed (around 18 knots) the armas actually surf on the bow wave of the main hull, hence they have a flat bottom similar to a surfboard. It all seems to be working very well.
    The hulls have a 15:1 L/B ratio. they are all proportional.

    Gerrard
     
  9. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    X Factor

    You seem to have done an excellent job-good luck with the boat!
     
  10. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

    Thank you

    Thank you very much for your kind comments, I now have all the fairing painting and detailing ahead of me, but have been wrapped with her trials.

    Will keep you posted, will hopefully have own website soon too.

    G
     
  11. Headharbor
    Joined: Mar 2010
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    Location: Boothbay, Maine

    Headharbor Junior Member

    sea handling

    Very interesting boat indeed. Any chance you can post a video or pics of the boat in 5' seas? Have you noticed the stern squating coming up to speed? I am particularly interested in how she handles a quartering sea, this seems to be a point of concern for power-trimarans in other threads...

    Nice job!
     
  12. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design

    G'day Headharbour, Thank you! When conditions permit I will definitely get images/vids of her in decent waves. There is some squatting in the stern, I attribute this to the slight rocker I put at the back of the boat, I'm putting a foil on in my next run to try and correct this, but will see what happens and keep you posted..
    In quarter seas,she seems quite healthy, keeps track and goes strong, I think having the armas 'elevated' and surfing helps this.
    When I crewed on Earthrace, I remember being in a quarter sea was quite a awkward/weird motion and I have tried to overcome this with this boat.

    G
     
  13. soffi
    Joined: Jul 2010
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    Location: Reykjavik, Iceland

    soffi Junior Member

    what materials did you use? the flickr pics look great
     
  14. fluidformations
    Joined: Jul 2010
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    Location: Moreton Bay, Queensland, Australia

    fluidformations Fluid Formations Design


  15. soffi
    Joined: Jul 2010
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    Location: Reykjavik, Iceland

    soffi Junior Member

    steel possible

    I like steel :) possible? ;)
     
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