Displacement hull design for lower horsepower (british seagull)

Discussion in 'Boat Design' started by ber1023, Oct 27, 2011.

  1. ber1023
    Joined: May 2008
    Posts: 35
    Likes: 3, Points: 0, Legacy Rep: 47
    Location: bermy

    ber1023 Junior Member

    I would like to make a fast boat that uses a british seagull engine, they are probably 2-4hp depending on which model. The boat needs to carry 2 people, gas and a cooler. Currently i do 14mph in my boat thats 24ft long, 28" wide on the floor, and its made by 2 peices of 24ft 14" wide ply and 2 10" 24ft peices (all straight cuts) and then 1 layer of fiberglass down the middle on the inside. total weight is probably 120 or so

    http://www.saving-old-seagulls.co.uk/phpbb3/download/file.php?id=1184&mode=view

    http://www.saving-old-seagulls.co.uk/phpbb3/download/file.php?id=1226&mode=view

    Those are examples of some boats (black one is carbon fiber, 32ft long)

    anyone have any ideas? the race is around bermuda..

    or how to make a boat like mine but take the rock out of it (when you put the two bottom halfs together the bottom bows about 2inchs)

    last but not least, what is good boat design software where i can test different things and see how it works according to the computer?
     

    Attached Files:

  2. messabout
    Joined: Jan 2006
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    Likes: 208, Points: 63, Legacy Rep: 1279
    Location: Lakeland Fl USA

    messabout Senior Member

    Use the search function to find other posts about this subject. It has been discussed here at some length.
     
  3. daiquiri
    Joined: May 2004
    Posts: 5,372
    Likes: 239, Points: 73, Legacy Rep: 3380
    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    For such slender hulls you can use Michlet for the power prediction and Freeship for hull modelling and exporting into Michlet.

    As has been noted by messabout, the race, it's rules and the related boat design issues were discussed in several threads in the past:
    http://www.boatdesign.net/forums/multihulls/seagull-racing-25481.html
    http://www.boatdesign.net/forums/boat-design/boat-designing-help-please-22711.html

    The last one has been created by you several years ago, and you've got some good replies there.
     
  4. Horsley-Anarak
    Joined: Jan 2009
    Posts: 33
    Likes: 2, Points: 0, Legacy Rep: 42
    Location: U.K.

    Horsley-Anarak Junior Member

    No help there then.:rolleyes:

    Perhaps people don't like old two-stroke outboards.

    Maybe you should have put fast rowboat, pedal powered, eco, seagull on the back in the title.:)

    H-A
     
  5. Seagull170
    Joined: Jan 2009
    Posts: 12
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    Location: England

    Seagull170 Junior Member

    I wonder if he was looking for some new ideas or sensible suggestions like,

    have you thought of foils or a Hickman sea sled?

    Come on gentlemen think outside the box.
     

  6. cor
    Joined: May 2008
    Posts: 114
    Likes: 9, Points: 0, Legacy Rep: 85
    Location: Alaska

    cor Senior Member

    Foils seem like a great idea.

    C.O.
     
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