Catamaran hull volume distribution, impact on seakeeping?

Discussion in 'Boat Design' started by dustman, Oct 20, 2024.

  1. dustman
    Joined: Jun 2019
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    dustman Senior Member

    How does the hull volume distribution in catamaran hulls affect seakeeping?
     
  2. Igor
    Joined: Jul 2022
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    Igor Senior Member

    In so many ways, I will let someone knowledge chime in for more info. As much as I know low volume or pointy sterns (Wharram) are more prone to pitching/hobby horsing upwind, carry less weight and by some (but not all) is considered safer in big seas downwind, albeit slower. Fatter sterns carry more weight, can surf more easily but if the bows are not balanced volume wise can be pitchpoling risk in big wind and seas..
     
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  3. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    It can be significant....especially when you take into consideration - speed of the hull.

    But like the things....it all depends... what you're comparing.
     
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  4. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    There are many parameters that will affect the effect of the volume distribution in different ways. For example, power or sail cat, target speed (displacement or planing mode will give different answers), prismatic coefficient, vertical or slanted bow, flare of sides, etc.
     
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  5. TANSL
    Joined: Sep 2011
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    TANSL Senior Member

    parameters or variables?. I can get a clear idea of the variables involved, but I am not so clear about the parameters.
     
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