New design a 22m motor boat - first shape of hull

Discussion in 'Boat Design' started by micspoko, Jan 4, 2012.

  1. Alik
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    Alik Senior Member

    What does standard say? I mean most of NA's draw bow to the right.
     
  2. PAR
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    PAR Yacht Designer/Builder

    I just quickly thumbed through a book on my shelf, Chapelle's "American Sailing Ships" and the same percentage of right verses left handed people also appeared in the lines drawings (about 10% - 15% where bow left), though I didn't count and draw an average. Interestingly enough, the isometric views where 90% bow left.
     
  3. Alik
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    Alik Senior Member

    I am left-handed person myself but draw boats according to marine drafting standard - bow to the right. I see no connection other than if someone got degree in naval architecture or drafting training will arrange drawings according to standard.
    [​IMG]
    http://albatrossdesign.livejournal.com/5040.html

    There is also psychological issue - objects pointed to right and up are positive, objects pointing to left and down are negative. Not sure if true or not, but it works for renderings.
     
  4. micspoko
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    micspoko Senior Member

    First calculation about speed and hydrostatics for this hull - for those who are interested and not for those who is just a waste of time
     

    Attached Files:

  5. Alik
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    Alik Senior Member

    Your stability curve is calculated to 180 deg - really there are no downflooding openings? How about table of weights? And why Savitsky method for this hull (look at stern shape - it is not prismatic!)?
     
  6. PAR
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    PAR Yacht Designer/Builder

    I learned to draw to the right too Alik, but sometimes, I draw it the other way. No good reason either.

    With buttocks like that, there's no way that hull can be driven up on plane, with any reasonable power or comfort level.
     
  7. Alik
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    Alik Senior Member

    Don't destroy the idle; the program have shown it will plane! :cool:
     
  8. tom28571
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    tom28571 Senior Member

    All of my early plans were drawn bow left and only changed to conform to the more common practice. I still think bow left looks more right to my eye. Don't know what that says about me either. My brain may be unaffilliated, like my voting card.
     
  9. PAR
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    PAR Yacht Designer/Builder

    Graphically, bow left is what a right hander feels more comfortable with, while the reverse is true of a lefty. This is one reason I flip flop, some shapes just "feel" better left handed, others right. Bow right is what we're taught, but I've been questioning and breaking rules all my life, why stop now.
     
  10. Alik
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    Alik Senior Member

    As to me, I am getting very suspicious once I see lines plan drawn bow to left... :) I looks like those who draw it got no formal training.
     
  11. daiquiri
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    daiquiri Engineering and Design

    For what it's worth, I got used to visually "read" and understand drawing's features much better when the bow is pointing to the right. That's the way I have most often seen them in the literature and in the building plans.
    Just for an info, in the aerospace industry airplanes are always drawn with the nose up and tail down. Some old tradition wants it that way for good luck. Nose down aircraft looks like it is plunging down, not a nice situation for an airplane. :)
     
  12. micspoko
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    micspoko Senior Member

    The Lines Plan is automatic generate from software that I use to crate a hull and really I now how to do a drawings for small boats and very large ships. Alik for your information. I have learn and work in shipbuilding industries about 14 years and I have only 30 years old. I have worked at build very large ships like tankers, container ships - lenght 200m and small boats like fishing vessel 10m long or ships for coast guard and several very difficult convesion and repairs. And see very large hulls a very different ships froma typical merchant ships to very strange ships (once I am worked in repairs a world war 2 submarine). And about 1 year I am learning a designing recreational craft and you only criticize and not knowing me and my capabilities dare say that nothing I don't know
     
  13. Alik
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    Alik Senior Member

    OK, so You are learning? Learning on projects for customers?

    Pls answer my questions about downflooding angle, Savitsky method, etc. Take a book to read answers for those questions. This will help You to get clear understanding on nonsense You are drawing and posting here.
     
  14. FMS
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    FMS Senior Member

    Alik, the first post does read "I am starting a new design. This isn't designed for client only doing an exercise."
     

  15. Alik
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    Alik Senior Member

    Yes, I read that. But sounds he makes other design for customers, with same mistakes - see all treads started by him.
     
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