which kind of keel is better ?

Discussion in 'Fiberglass and Composite Boat Building' started by hyboats, Aug 22, 2010.

  1. hyboats
    Joined: Jun 2010
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    hyboats Junior Member

    See the attached pictures:p
     

    Attached Files:

  2. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    I see a forepeak and an engine room. What are you asking for ?
     
  3. tinhorn
    Joined: Jan 2008
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    tinhorn Senior Member

    I prefer the keel with big motors attached.
     
  4. apex1

    apex1 Guest

    I like them attached to the bottom.......
     
  5. wardd
    Joined: Apr 2009
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    wardd Senior Member

    and in the water not up in the air
     
  6. CatBuilder

    CatBuilder Previous Member

    The OP has labeled the pictures. I think he's talking about stringers and calling them keels??
     
  7. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    OK, but better for what?
     
  8. hyboats
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    hyboats Junior Member

    The first one only with stringers, the second one with big keel. I want to know which one is stronger ? :confused:
     
  9. hyboats
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    hyboats Junior Member

    The second one is a boat hull, not forepeak
     
  10. Petros
    Joined: Oct 2007
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    Petros Senior Member

    either design can be made stronger than the other. There are different reasons for using one design over another, and it is not strength. Usually it has to do with the designers goal for the hull. Shallow draft, weighted keel, directional stablity, displacement hull vs. planing hull, etc.

    So the question of "which is better?" can only be answered if we know what is your design objective for the hull.
     
  11. apex1

    apex1 Guest

    This is a keel

    [​IMG]

    and this is one

    [​IMG]

    And this is not a keel:

    [​IMG]

    So then,

    what do you want to know hyboats?
     
  12. hyboats
    Joined: Jun 2010
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    hyboats Junior Member

    This is a 18ft cuddy boat hull
    I usually call it keel, now I want to know why this boat use this kind of (keel), not stringers ? why some boats only with stringers ? :confused:
     
  13. Herman
    Joined: Oct 2004
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    Herman Senior Member

    The picture with the engines in has stringers laminated "in situ" which is a lot of work.

    The picture which is repeated above has received reinforcing from a laminated part.

    Both options I guess are on the other end of the scale, with below picture in between:

    [​IMG]

    As for the why: It all depends on requirements by the builder. If you plan on doing 100 boats, I would never laminate stringers in situ. Way too much work. I would opt for the second picture, or even better, the one I submitted. I feel the one you gave is more engineered for practical interior requirements then for reinforcing. They did fill it with foam, I see, to generate buoyancy. (and probably stiffness...) This is probably one of the boats which will be on this forum in 10 years, in the "water logged foam" section.
     

  14. apex1

    apex1 Guest

    Thanks Herman.
     
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