Rabbet Line

Discussion in 'Boat Design' started by Jammer Six, Sep 2, 2014.

  1. Jammer Six

    Jammer Six Previous Member

    How is a rabbet line calculated?

    I have the plans for the International Dragon, and they have a faint line in approximately the right position, but there is not a dimension to it or on it.
     
  2. DCockey
    Joined: Oct 2009
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    DCockey Senior Member

    Do you have the complete set of plans and table of offsets intended for a builder? If so there should be enough information to determine the location of the rabbet or bearding line. Different designers provide the information in different ways though.

    Or do you have just a lines plan?
     
  3. gonzo
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    gonzo Senior Member

    You loft to the outside planking and then deduct the planking thickness. The intersection of the inside of the planking with the keel and bowstem is what determines the rabbet line. There are two: the actual rabbet at the end edge of the plank, and the back rabbet..
     
  4. DCockey
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    DCockey Senior Member

    "The bearding line is formed by the intersection of the inside of the planking with the face or side of the keel, just as the rabbet was formed by the intersection of the outside of the planking with the side of the keel."
    p 107 Boatbuilding, Howard I. Chapelle
     
  5. gonzo
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    gonzo Senior Member

    Different names for the same thing
     
  6. Jammer Six

    Jammer Six Previous Member

    I see. These plans are drawn to the outside of plank, and I just read in another book that this is also called "drawing to the rabbet line".

    So I have the rabbet line, the only thing left to lay out is the bearding line.
     

  7. Ad Hoc
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    Ad Hoc Naval Architect

    Yup... Gonzo's nailed it :)
     
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