Low power launch for choppy condtions

Discussion in 'Boat Design' started by frank smith, Oct 1, 2013.

  1. frank smith
    Joined: Oct 2009
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    Location: usa

    frank smith Senior Member

    I am looking for info for a 22' Low power launch type boat. It should be able to run at 18 mph max, and run at an average of 12 mph in 1-2' chop. the motor will be 25hp or so. Box keel or warped bottom vee. I think that the warped bottom would roll the most when running. I am not sure how the box keel would be best terminated for out board.
    Disp around 2000lb beam about 6-6.5' The box keel would be the simplest form to build. Are the any other bow shapes to consider?
    Then maybe a simple asymmetrical dory cat would be the best solution.
  2. sprit
    Joined: Jul 2013
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    Location: Lexington, MA, USA

    sprit Junior Member

    Bill Atkin's Ninigret
  3. frank smith
    Joined: Oct 2009
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    Location: usa

    frank smith Senior Member

    Ninigret is on the list , and there is one close by, but I have never seen it run. Maybe I can get a hold of the owner.
  4. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    I think it a good idea to make it worth the while of the boat owner by offering some cash for a demo, money well spent imo. :D
  5. michael pierzga
    Joined: Dec 2008
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    Location: spain

    michael pierzga Senior Member

    The UN FAO boat would be a good choice.

    free plans on their website

    nice looking low power boat.

    Attached Files:

    • fao.jpg
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  6. Earl Westman
    Joined: Oct 2013
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    Location: Manitoba, Canada

    Earl Westman Junior Member

    Hi Michael, I have looked at those plans for years, but that is the first photo I have been able to see of one. I am right now trying to figure out if I could frame it like a Spira dory (extra frames), and put an antique 18 hp Johnson on it. I like the drawings of the 6.3 meter boat. It looks like it would handle chop, as well as allow me to put up a sail.
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