Box barge hull shape - which is better?

Discussion in 'Hydrodynamics and Aerodynamics' started by Justaguy, Jan 30, 2016.

  1. Justaguy
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    Justaguy Junior Member

    Or ...

    Either that, or just maybe not everyone has the ability to understand the difference between a request for a design or project plan based on inadequate specifications (which was never made) and a request for an explanation of a concept (which is what I wanted).

    Sorry, I have limits. I'm not going to pretend like I'm lost and misguided. The real problem in this thread is that no one yet has actually tried to answer my question. Instead, everyone is off on a tangent doing something and pushing an approach that I didn't ask for.

    Somebody will likely come along eventually that gets it. Otherwise, "if at first you don't succeed, ..."
     
  2. waikikin
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    waikikin Senior Member

    If it's going to be self powered & I'm partially ignoring your three options and designed for ply as your intitial post.... maybe 8' multiples, 32-40-48' x 12-20' wide. I would work around the following: at the bow a vertical headlog of 12-18" as NArtichoke suggests then a 30 degree panel & a 15 degree panel or approximations of such in harmony with your framing then a strait bottom then cut up approximating 30 degrees then level again 6 inches below waterline unloaded to accomadate stern gear, rudders etc then vertical transom, if you are using outboard power and not running fast I would cut away similar, if in the smaller lighter range & powering for speed then just a couple/few inches of rise at the stern to assist aft trim once up and at it.
    J.
     
  3. Mr Efficiency
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    Mr Efficiency Senior Member

    Without knowing what your boat is proposed to do, everyone is guessing. For example, if by some chance you have ambitions to travel much faster than a crawl, it is all-important to mention that.
     
  4. waikikin
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    waikikin Senior Member

    All three options first presented suggest a brisk walk at best.

    Jeff
     
  5. Justaguy
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    Justaguy Junior Member

    You're trying, and I have to recognize that, but still not on the right freq.
     
  6. Justaguy
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    Justaguy Junior Member

    All other information, considerations, and data are irrelevant ... at this point.

    For some, I'm going to speak slowly and use small words:

    Bow - 45 or curved. What's better? Why?
     
    Last edited: Feb 4, 2016
  7. TANSL
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    TANSL Senior Member

    From the point of view hydrodynamic curves are always better. But, as has been previously stated, for small speeds, the forms are not as important and worth you consider the ease of construction.
     
  8. Mr Efficiency
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    Mr Efficiency Senior Member

    What arrogance. No-one ought to be bothering with him.
     
  9. waikikin
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    waikikin Senior Member

    Well seeing as this is an open forum/discussion.... we'd hate to see anyone waste good material & effort in/on a cr@p boat... just expressing how i'd do it, this is more than some esoteric concept regards shape as the materials and self powered are up as "If I had to describe the general scenario, I'd say, I'd like to identify that basic shape which would move most easily through the water, put up the least resistance, therefore reduce drag, therefore increase fuel efficiency, therefore optimize speed or at least ease of getting to its displacement hull speed. Assume it would be under its own power." and constrction medium ply... box barge implies parallel sides & flat deck.
    J.
     
  10. waikikin
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    waikikin Senior Member

    None

    J.
     
  11. waikikin
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    waikikin Senior Member

    All fine, others may be assisted, every option was poor as drawn, material can be better expended unless the plant is static.
    J.
     
  12. Justaguy
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    Justaguy Junior Member

    See, not that hard!

    Thank you, TANSL.

    Now, anyone care to add the "why" part?
     
  13. gonzo
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    gonzo Senior Member

    Even slower: If you don't say what you want, our marine crystal balls don't do well online. They are designed for in-person interviews. It is up to you to make a clear statement.
     
  14. Justaguy
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    Justaguy Junior Member

    ... yeah, and compounding apparent conceptual deficiencies with humor deficiencies ;-) I never used to understand the phrase "someone is taking himself too seriously," but now I think I do.
     

  15. Justaguy
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    Justaguy Junior Member

    Unfortunately, I couldn't make it any clearer even with puppets and magic markers. I think we'll just have to drop it and move on.
     
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