Offset sections for a stepped chine boat

Discussion in 'Boat Design' started by TimothyM, Sep 9, 2010.

  1. TimothyM
    Joined: Jul 2010
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    Location: Maine

    TimothyM Junior Member

    I have a customer that wants me to cut station molds to build a plug for a stepped chine boat. The attached drawing shows a section in blue and the ammount he wants to offset for sheathing the plug in red. How do I offset this section and keep the chine locations and/or how is a plug like this normally built?
     

    Attached Files:

  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Have you ever lofted? If he wants molds cut at the red line, what is the problem?
     
  3. TimothyM
    Joined: Jul 2010
    Posts: 74
    Likes: 2, Points: 0, Legacy Rep: 53
    Location: Maine

    TimothyM Junior Member

    I know how to loft, but I have never built a plug for this type of boat. What I really need to know is how this type of mold is sheathed so I can offset the lines correctly
     

  4. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Typically you subtract the hull shell thickness from the station mold. Of course this means you'll need scantlings for the hull shell, so you know how much to deduct.
     
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