Sea Sled madness. It’s in my brain.

Discussion in 'Fiberglass and Composite Boat Building' started by DogCavalry, Nov 11, 2019.

  1. BlueBell
    Joined: May 2017
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    BlueBell . . . . .

    screen shot 2022-07-20.jpg
     
    Last edited: Jul 20, 2022
  2. fallguy
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    fallguy Senior Member

    Like, the sea looks flat. How did they even do that?
     
  3. Barry
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    Barry Senior Member

    A jet boat going into full reverse at high initial speed will produce this situation.
     
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  4. DogCavalry
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    I'm listening for the thousandth time, to Lateralus, by Tool. To enjoy the flavour of life, take big bites. Moderation is for monks. The fellow driving that boat is no monk.
     
  5. fallguy
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    fallguy Senior Member

    I'm guessing that'd loosen a few screws that weren't tight enough.
     
  6. BlueBell
    Joined: May 2017
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    BlueBell . . . . .

    You are correct, it's a jet drive.
    They can go from WOT to full-stop in about two boat lengths.
    Fun... so long as nobody's following close behind!
     
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  7. DogCavalry
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    Or anyone is standing beside the driver with their hands full
     
  8. DogCavalry
    Joined: Sep 2019
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    IMG-20201026-WA0010.jpg
    Good view of the vulnerable area. Shows proportions of cantilevered transom assembly.
     
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  9. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell . . . . .

    It doesn't show very well for me.
    It's rather confusing as the boat is on an unknown angle.

    "Vulnerable area" or "point-of-failure", or "weak-point".
    A graceful curve could have alleviated it.
    I'm surprised you're still dwelling on it.
    Are you going to leave it and move on or try and justify that it's okay as is.
    Just leave it and watch for failure-over-time.
    Maybe it never will.

    So, what else are you working on?
    Is there a proposed splash date?
     
  10. DogCavalry
    Joined: Sep 2019
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    Mostly I don't think about it.

    At the moment I'm waiting for the correct ignition harness, and fuel tank hardware.

    I wanted to go in the next week, but critical parts are still absent. Once they arrive, it's a runner as they say.
     
  11. fallguy
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    fallguy Senior Member

    Okay, I have a question for the brain trust.

    Is this design same like a catamaran with ultimate stability upside down?
     
  12. DogCavalry
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    As @Ad Hoc would say "that depends" . Like a cat they have massive stability. Without a mast and sails, it would take extraordinary circumstances to turn one over. Once inverted is where the "depends" comes in. How stable upside down?
     
  13. fallguy
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    fallguy Senior Member

    Well, what would safe seas be? Like, is she good for 10 footers or 20 footers on Cape Scott?
     
  14. bajansailor
    Joined: Oct 2007
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    bajansailor Marine Surveyor

    Pretty much any 'conventional' monohull powerboat is (also) going to be very happy (stability wise) if it is upside down, unless it is specifically designed to have a positive GZ righting lever through 180 degrees (like many lifeboats, eg the RNLI), perhaps by means of a watertight deckhouse structure.
    But this does depend on all the doors and hatches being closed properly in the event that the boat does capsize.
     
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  15. DogCavalry
    Joined: Sep 2019
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    Quick question: does rain water pose any danger to an Al tank, or just sea water?
     
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