What floats your boat.

Discussion in 'Boat Design' started by tom kane, May 6, 2015.

  1. tom kane
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    tom kane Senior Member

    It might be a good idea if you thoroughly read the whole lesson.
    Can you find a website for us with the correct information.
     
  2. tom kane
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    tom kane Senior Member

    OK show "US" the right info and show "US" who "US" is please.
     
  3. tom kane
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    tom kane Senior Member

    I can not wait to get away from BOTTOMS and make a bit of progress on designing the rest of this boat for our impatient customer.
     
  4. FMS
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    FMS Senior Member

    There are a few more sentences that could be refined. The main objective should be to rework the paragraph that you misunderstood when you used the "what floats your boat" lesson to support your claim that a v bottom can have a shallower draft than a flat bottom based on the theory presented there. (assuming other factors equal)
     
  5. FMS
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    FMS Senior Member

    These additional factors are why there are so many boats with a moderate v.
     
  6. Ad Hoc
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    Ad Hoc Naval Architect

    But your students have an open and enquiring mind and a good grasp of basic maths and engineering no doubt too :p

    Chalk and cheese here I'm afraid :(
     
  7. DCockey
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    DCockey Senior Member

    I will assume that "our impatient customer" is hypothetical, not an actual individual you are in contact with.
     
  8. Mr Efficiency
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    Mr Efficiency Senior Member

    This part I DO believe ! :D
     
  9. DCockey
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    DCockey Senior Member

  10. tom kane
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    tom kane Senior Member

    You are assuming that I said that a v bottom can have a SHALLOWER draft.

    A flat bottom boat does not mean that it is shallow draft as the solid block
    in Figure 1 shows. (not assuming other factors equal.

    If the solid cube of wood in Figure 1 were stretched out into a plank that was eight feet long, nine inches wide and 2 inches high,it would have the same weight and volume as the cube,but it would float nicely right at the surface of the water. This is because the plank would have six square feet of area for the water pressure to push against instead of only one square foot the block has.
    Notice that the plank and the block have flat surfaces.

    To decrease the draft of a boat increase the area that the water has to press against.
     
  11. tom kane
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    tom kane Senior Member

  12. yofish

    yofish Previous Member

    After all is said and done, the only post of all that made me think was Waterwitch's.
     
  13. tom kane
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    tom kane Senior Member

    Just think of the fun ahead and all of the research we will have to do to update
    our ideas.
     
  14. Rastapop
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    Rastapop Naval Architect

    Some of us here are naval architects, or perhaps engineers of other persuasions. cmckesson is a step beyond that, he teaches naval architecture.

    A V bottom cannot have a draft shallower nor as shallow as a flat bottom (constant mass and max beam).

    And if you convert it to a V bottom, with the same mass, its draft will be even greater.

    And when you convert flat to V (same mass), you increase the surface area, but you also angle that area away from horizontal. The total buoyancy force pushing straight up doesn't increase.
     

  15. tom kane
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    tom kane Senior Member

    There are lots of ways to get people to think and learn I am learning heaps.
    Thank`s
     

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