Sea Sled madness. It’s in my brain.

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

  1. cracked_ribs
    Joined: Nov 2018
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    cracked_ribs Junior Member

    That post deserves an award; that neatly summarized pretty much every core concept of designing structures. Very elegantly presented.
     
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  2. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    I heartily agree CR. Getting some first class content here. And of course it is my imprecision with language that led 2 NA's to politely correct me. I was thinking isotropic in just the 2 dimensions I'll be concerned with, because an epoxy saturated wood hull is not going to be crushed normal to the hull surface. But! Isotropic or Anisotropic describe the assembly in all 3 dimensions. You can tell I haven't suffered the attentions of a pedantic professor by how carelessly I use the terms.

    So. The heavy transverse frames inside the cabin really aren't cutable, without a dangerous loss of strength. Is it sufficient to run longitudinal members between them, assuming they are properly integrated?
     
  3. DogCavalry
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    DogCavalry I aim to misbehave.

  4. cracked_ribs
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    cracked_ribs Junior Member

    That's really coming along!
     
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  5. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    20210502_111259.jpg 20210502_121855.jpg 20210502_172103.jpg
    Some glass work, some carpentry.
     
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  6. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Looking good John :cool:

    Still curious, are you going to stiffen up the apex, noted below:

    upload_2021-5-3_14-10-32.png
     

    Attached Files:

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  7. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    Thanks guys. I'm planning on adding more light transverse floors, to support the sole better, then longitudinals between them to carry loads from the bow to the momentum at the transom.
     
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  8. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    20210508_195847.jpg 20210508_195803.jpg

    More framing for 4 more full bulkheads, to bear loads.
     
  9. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    20210509_172700.jpg
    A sample of my hull scantlings. Neighbors in the boatyard expressing concern or skepticism about strip plank composite. Apparently it's a rare and exotic construction technique. Who knew?
     
  10. fallguy
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    fallguy Senior Member

  11. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    yeah, they are clueless
     
  12. DogCavalry
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    DogCavalry I aim to misbehave.

    I am not inclined to disagree. I want the strongest structure possible, considering the unchangable planking and outer glass. I will add more glass inside, but I want to distribute the load on the cockpit sole over as much hull as possible. Longitudinals place the load on only 1 or 2 planks at a time. Too focused.
     
  13. fallguy
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    fallguy Senior Member

    I am referring to the wall stud like things.
     
  14. DogCavalry
    Joined: Sep 2019
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    DogCavalry I aim to misbehave.

    Frames. They transfer load from the full depth floors to the hull sides. Probably overkill.
     

  15. bajansailor
    Joined: Oct 2007
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    bajansailor Marine Surveyor

    Are you going to attach bulkheads to these four frames?

    This will result in many small void spaces that will be inaccessible (foam filled afterwards?) - if this is the case, it does seem to me to be a bit of an overkill?
     
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