Sea Sled madness. It’s in my brain.

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

  1. DogCavalry
    Joined: Sep 2019
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    DogCavalry Senior Member

    I was thinking more about loss of strength, or at least stiffness, as the db1800 crosses imperfections.
     
  2. DogCavalry
    Joined: Sep 2019
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    DogCavalry Senior Member

    Spent the holiday yesterday sanding the entire hull. Ready for the glass and epoxy, which is due in less than a week. Ordered from Noah's in Toronto, per Fallguys suggestion.
     
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  3. bajansailor
    Joined: Oct 2007
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    bajansailor Marine Surveyor

    Brilliant!
    Do you have any photos of your newly sanded hull to post please?
     
  4. DogCavalry
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    DogCavalry Senior Member

    I'll take some.
     
  5. BlueBell
    Joined: May 2017
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    BlueBell . . . _ _ _ . . . _ _ _

    Nice going.
    Photos please.
     
  6. fallguy
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    fallguy Senior Member

    You don't want any steps or major hi/low spots. For example, an 1/8" step is much too much. A 1/16th inch step will result in an air pocket. Very bad on the hull bottom or below waterline. Any air pockets below water must be rejected and repaired as they are subject to hydraulic forces and quickly grow if water enters even more. A low area without steps can be faired later.

    Take some pictures and I can tell you more about how I would lay it out.

    some areas can also be precoated with thickened epoxy just before glassing; I generally hot fillet everything as I hate sanding fillets

    High spots are basically unrepairable. As a mud m tape guy; u get it
     
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  7. Pericles
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    Location: Heights of High Wycombe, not far from River Thames

    Pericles Senior Member

    Hello DogCavalry,

    As a sop to these virus times, will you be fitting a Sea Sled Sneeze Guard?

    Some catamarans with a low under deck and some inverted vee are prone to "sneeze". This means that under certain conditions, the pressure under the deck forcefully pushes water forward and sprays from under the bow shower the crew. To prevent this, many inverted vee boats feature a "sneeze guard". This is a wide spray rail fitted under the foredeck. Texas Sled 18 (TX18) - Study Plans https://bateau.com/studyplans/TX18_study.php?prod=TX18
     
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  8. fallguy
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    fallguy Senior Member

    Funny, tht question came up awhile ago; might have been me asking what the funny timber up front was. Think he said he was gonna try without first iirc.
     
  9. Pericles
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    Location: Heights of High Wycombe, not far from River Thames

    Pericles Senior Member

    Thanks fallguy. Good to know.
     
  10. DogCavalry
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    DogCavalry Senior Member

    Welcome to my madness Pericles. I love the timeliness of your question.

    I may retrofit one. I'll try without, because the bow is built for bumping and pushing, and it may be destroyed. But a few drenching sneezes may force my hand.

    I bought those TX-18 plans, by the way. Worth every penny.
     
  11. DogCavalry
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    DogCavalry Senior Member

    Thanks Fallguy. I'll do exactly that. I expect to lean on your advice a great deal once I start.
     
  12. DogCavalry
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    DogCavalry Senior Member

    I ordered 10 gallons of micro balloons for an initial step. Hawk and trowel it over all the imperfections, voids and discontinuities, so that the glass can lay on a flat surface.
     
  13. Pericles
    Joined: Sep 2006
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    Location: Heights of High Wycombe, not far from River Thames

    Pericles Senior Member

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  14. fallguy
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    fallguy Senior Member

    I don't like balloons alone. I mix in cabosil or fumed silica.
     
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  15. DogCavalry
    Joined: Sep 2019
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    Location: Vancouver bc

    DogCavalry Senior Member

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