Mizzen forestay

Discussion in 'Boat Design' started by willfox, Apr 30, 2010.

  1. willfox
    Joined: Oct 2008
    Posts: 79
    Likes: 1, Points: 8, Legacy Rep: 22
    Location: southampton

    willfox Junior Member

    Does anyone know of any good methods to calculate the forestay load? I have seen Germanischer Lloyds rules for righting moment share but it seems to only take in to consideration the force when all sails are up. With a yawl, quite often the mizzen is used in unison with a smaller jib in heavier winds therefore the condition set with Germanischer is not really valid. Any views? I have doubled this assumed righting moment to design the mast, would it seem appropriate to use the nordic boat standart with this righting moment and mast height above the water line?
  2. Greybarn
    Joined: Apr 2006
    Posts: 60
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    Location: Maine

    Greybarn Junior Member

    I have always thought the Mizzen Forestay load (assuming there is no upwind sail hanked to it) is a function of the mizzen sheet load.
  3. SuenosAzules
    Joined: Apr 2010
    Posts: 33
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    Location: Palm Beach Gardens, Florida

    SuenosAzules Junior Member

    an idea..

    I tried searching for something on the internet like you did, however I did not find anything concrete. If I were in your position I would contact a reputable sail maker like Mack Sails or Doyle Sails and see what they do to their calculations.
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