Star Class

Discussion in 'Boat Design' started by gplates, Aug 2, 2015.

  1. gplates
    Joined: Aug 2015
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    gplates New Member

    Hi,
    Im working on my A- level product design project in which I am going to redesign the hull of the star class. In order to analyse the effectiveness of my redesign I would like to have the polar diagrams and stability calculations of the existing star class. I am wondering if anyone can help me?
    thanks in advance
     
  2. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    Welcome to the forum.

    If you're going to redesign the Star, how will you get polars and stability for your new version and why wouldn't you use your own Star observations and data, in evaluation of proposed improvements?
     
  3. gplates
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    gplates New Member

    Thanks for the reply,
    I will be calculating theoretical polars and stability for my new version using a computer program a family friend wrote. I simply do not have the time needed to complete such calculations on my star.
     
  4. TANSL
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    TANSL Senior Member

    With all due respect, if you do not have time to do one thing, give it to another that do have time. To copy, without analyzing, is always dangerous.
     
  5. Jamie Kennedy
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    Jamie Kennedy Senior Member

    Also would be better to compare theoretical A to theoretical B, and verify theoretical A with actual A. Comparing Actual A to Theoretical B leaves too many things open to make any meaningful conclusions.
     
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  6. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder


    Bingo . . . and much better put than my response.
     
  7. messabout
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    messabout Senior Member

    n addition to that, Star class people will be sorely annoyed that you dare to improve on their venerable old sharpie like boat.
     
  8. PAR
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    PAR Yacht Designer/Builder

    There's a lot that could be done to a Star that would improve about every aspect of it's performance envelop. The real question is, how do you know you're improving anything without a baseline, preferably one you've developed yourself? You can't compare something to nothing, so the best route is to establish a baseline and work up changes, to see how they stack up against you baseline data.
     
  9. gonzo
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    gonzo Senior Member

    Probably the first step is to define which parameters you want to change. For example, more deadrise may improve upwind performance, but will slow the boat downwind.
     
  10. Jamie Kennedy
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    Jamie Kennedy Senior Member

    As much as I love the damn things when they are beautifully faired and finished, surely the keel and rudder have to be the first things to go. :)
     
  11. Jammer Six

    Jammer Six Previous Member

    If you improve a Star, you end up with a Dragon.
     
  12. Jamie Kennedy
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    Jamie Kennedy Senior Member

    touché

    or a magic dragon
    [​IMG]
     
  13. The Q
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    The Q Senior Member


  14. Canracer
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    Canracer Senior Member

    I know a Star guy here in Sarasota bay, and he says that modifications are enthusiastically discussed within the right circles.
     
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