Lofting question

Discussion in 'Boat Design' started by longfellow, Mar 17, 2010.

  1. longfellow
    Joined: Apr 2009
    Posts: 39
    Likes: 1, Points: 0, Legacy Rep: 17
    Location: upstate NY

    longfellow Junior Member

    I have a simple Vee bottom daysailer with the easiest hull to plank (developable surfaces and a chine that meets the front of teh keel at teh base of the stem. Offset table is complete but the typical locations above LWL and forward of Station one which give the very front of the rabbet at both the top and bottom of the stem, are not there. This is not uncommon, particularly with the designer and date in time in his career when he designed boats. Water under the bridge.
    My approach, which I'd like your concurrence or comment on would be;
    Complete the plan with chine and sheer lines. Fair them to teh halfbreadth of the stem which I do have (typical 1/4 inch for a 1/2 inch brass hlf oval at teh stem face).
    Use these two points fwd of station one tocomplete the profile and HOPE THAT THE KEEL BOTTOM AND SHEER LOOK FAIR !!!
    Hopefully I haven't deviated too much and introduced any difficult twist in either the side or bottom planks as I may decide to swap out the solid planks for plywood and I know about the rules for bending plywood.
    I can't think of any other way to complete these lines.
    ?????
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    If you are planking with plywood, it doesn't make much sense to make a rabbet. Plank to the stem, and then glue or laminate on a false stem. It is way easier and faster.
     
  3. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member


  4. gonzo
    Joined: Aug 2002
    Posts: 14,338
    Likes: 619, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    If a batten lays fair, it should be easy to plank. Use a batten of the same or more thickness than the planking.
     
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