How to define the sails for a ship of high performance

Discussion in 'Sailboats' started by Jeandupont, Oct 1, 2006.

  1. Jeandupont
    Joined: Apr 2006
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    Location: Brasil

    Jeandupont Designer/Boatbuilder

    How to define the Sails for a ship of high performance of 5 meters whose the total weight of the sailing ship 300 kg ? and had it accommodated on board at the most 3 people in the total of 240 kg more?
     
  2. Jeandupont
    Joined: Apr 2006
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    Location: Brasil

    Jeandupont Designer/Boatbuilder

    How many square meters of sails do I need for me to plane a sailing ship of high performance with 600 kg of total weight with peoples on board?
     
  3. gggGuest
    Joined: Feb 2005
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    gggGuest ...

    Its really more about how large sails can you hold up in the weather you will commonly be sailing in. There is a lot in Bethwaite in this sort of area.
     
  4. Richard Hillsid
    Joined: Mar 2006
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    Richard Hillsid Senior Member

    It depends on the force.


    The force of the wind
    The force of the drag

     
  5. Jeandupont
    Joined: Apr 2006
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    Jeandupont Designer/Boatbuilder

    Type about 15 knots for example
     
  6. Doug Lord

    Doug Lord Guest

    Some facts

    I've used the figure of 500 sq. ft.(46.4 sq. m) /per metric ton(2200lb.) for the power required to plane- I think I found it in Marchaj a long time ago. There is a formula: Displacement in lb.'s divided by( LWL waterplane area in sq.ft. times waterline length in feet) which gives a figure that should provide some degree of planing up to 1.5 (I14 about 1.22)-with enough power. From Sailing Yacht Design by Douglas Phillips-Birt.
    Pierre Gutelle in "Design of Sailing Yachts" has a whole chapter on planing.
    This site is invaluable for all the statistics it provides on high performance boats in the range you're looking at:
    Comparison(downwind-has links to upwind comparisons)
    Address:http://www.contractsolutions.net/J18/jn-18_comparison.html Changed:11:53 AM on Sunday, September 3, 2006
    ------------------------
    Good luck and do as much research as possible.
     
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  7. Jeandupont
    Joined: Apr 2006
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    Location: Brasil

    Jeandupont Designer/Boatbuilder

    Thank you Doug, through of that site I will have
    a good reference and with that I will apply in my project .
     
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