Curved stem in Carlson chine hull designer

Discussion in 'Software' started by jake101, Oct 3, 2017.

  1. jake101
    Joined: May 2016
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    Location: australia

    jake101 Junior Member

    Hi all.

    Is there a way to draw a curved stem in Carlson hull designer?

    I would like to make a bow such as a "spoon" bow such as in the photo below

    http://www.jordanyachts.com/wp-content/uploads/2009/11/bows.jpg

    at the moment i have a hard chine hull drawn up that i will be building as a 1/15 model from balsa in the next few weeks. the only problem is i can't draw a curved bow/stem to give it a nicer look, I can only draw a "raked" stem.

    if I cant draw it in Carlson, is there another way?

    also, whats the best way to print to scale from Carlson? i can print to PDF, but i can only send to a print shop in france, I want to print it to make a 600mm long model. the language barrier is a killer here and I dont want to spend a fortune on reprints.

    thanks for any help

    Jake
     
  2. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    The line of the stem isn't independent of the shape of the bow generally, and especially if you are working with developable surfaces. Your spoon bow would be the natural shape formed by convex topsides meeting, hollow concave sides would naturally form a stem curved the other way. More or less straight sections topsides will normally end in a more or less straight stem.
     
    Last edited: Oct 3, 2017
  3. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    No you can't make a curved stem in Carlson hull designer, if memory serves me correctly, but in most cases it doesn't matter, in terms of volumetric calculations. Draw a straight (raked) stem at about the angle you want the spoon, perform the calculations, then leave a little extra on the ends of the planking, where you'll carve the shape you actually want. A little Mickey Moused, but the easy way around.
     

  4. jake101
    Joined: May 2016
    Posts: 14
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    Location: australia

    jake101 Junior Member

    Thanks for the advice

    I will see how it goes this weekend.
     
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