Principles of yacht design v5

Discussion in 'Education' started by pironiero, Oct 8, 2021.

?

is it enough?

  1. enough

    25.0%
  2. not enough(put suggestions in replies)

    75.0%
  1. pironiero
    Joined: Apr 2020
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    pironiero Senior Member

    I have a very simple question, is this book enough for building a 32ft hull using mold and resin infusion method or I need to get some other books about the topic?
     
    Last edited: Oct 8, 2021
  2. TANSL
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    TANSL Senior Member

    No one in human history, as far as I know, has been able to build a ship just by reading a book. It would be miraculous, worthy of the deepest admiration. No, that book, nor many more, are enough to build a 32 ft long boat.
    I would tell you that a person without books but with experience could build that boat, but on the contrary it is not possible, a person with books and without experience is not capable of building anything.
     
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  3. pironiero
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    pironiero Senior Member

    yeah, i meant hull
    ill try to prove you wrong in a couple of years
     
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  4. TANSL
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    TANSL Senior Member

    I will have no problem admitting my mistake if you are able to prove it.
    What type of boat, what construction system are you going to use? I suppose that previously you will do the project, you will find someone to do it or you will buy an existing project.
    If you need it and it is in my hands, I will be happy to help you.
    Good luck with your idea and enjoy doing it.
     
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  5. pironiero
    Joined: Apr 2020
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    pironiero Senior Member

    that sandwich stuff

    i helped my father to build his 38ft cold molded boat, but it was really long ago

    i have nothing going on in my life, no family, not much friends and stuff, got bored out of my current hobbies, might as well try to do something that worth while.
    [​IMG]
    im not out of options but even the thought of building something substantial makes me feel good, so yeah gotta do what you gotta do
     
  6. Tedd McHenry
    Joined: Feb 2020
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    Tedd McHenry Junior Member

    Principles of Yacht Design is excellent, but it mainly covers parametric design. It doesn't say a lot about structure, and not even all that much about loads. You'll need other references to help you design the scantlings, estimate rigging loads, and other design details. I'm sure it will also serve you well to become familiar with some relevant standards, such as ISO 12215. (Though I say that as someone who is not yet familiar with any of the standards!)
     
  7. Kayakmarathon
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    Kayakmarathon Senior Member

    Try something a little more simple like a wood strip canoe or kayak from a kit as a refresher course in construction methods and tools. If your heart is in sailing, then build a small sailboat. You won't have to wait as long to use you new boat, and you will feel better schooner. ( I just had to pun)
     
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  8. fcfc
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    fcfc Senior Member

    Way too simple.

    For instance, all the chainplates computation are missing. They just give results for some. But not how it should be computed.

    And it is a design book, not a manufacturing book. It wont say anywhere how an infusoin layout should be done.
     

    Attached Files:

  9. AlanX
    Joined: Mar 2022
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    AlanX Senior Member

    Principles of Yacht Design by Larsson and Eliasson, is very much focused on yacht design using the ABS and ISO standards.

    If your actual focus is on building with fiberglass then these free Internet publications may be of interest:

    West System: The Gougeon Brothers On Boat Construction book
    https://www.westsystem.com/wp-content/uploads/GougeonBook-061205-1.pdf

    FAO - TRAINING MANUAL on the construction of FRP beach landing boats
    http://www.fao.org/3/a-al360e.pdf

    West System: Fiberglass Boat Repair & Maintenance
    https://www.westsystem.com/wp-conte...ass-Boat-Repair-and-Maintenance-Manual-lr.pdf

    If you actually do want to design your own boat then the ABS standards may be of interest:

    Regards AlanX
     
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  10. DogCavalry
    Joined: Sep 2019
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    Throw in Gerr's Elements of Boat Strength for scantlings. Get free plans for something similar to compare your calculated scantlings for a reality check.
     
  11. AlanX
    Joined: Mar 2022
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    AlanX Senior Member

    @DogCavalry, agreed.
    The other book that I like is "Designing Power and Sail" by Arthur Edmunds.
    A couple of formula errors and a few tricky bits (head scratching) but otherwise very good choice for a DIY non-empirical approach.
    Edmunds' boats will have a generally heavier duty hull plating which is not a bad thing for DIY design and build.

    AlanX
     
  12. pironiero
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    pironiero Senior Member

    https://gerrmarine.com/Articles/BoatStrengthIBEX.pdf
    are you talking about this one?
     
  13. DogCavalry
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    DogCavalry Soy Soylent Green: I can't believe it's not people

    That's the book, but the link you provided is to an appendix he wrote ten years later. I had the book out of the local library before I bought it.
     

  14. rnlock
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    rnlock Senior Member

    I suggest starting with smaller projects. I'm sure that cold molded boat experience will help. If you can find an experienced builder who needs help with an infusion project, you'd probably learn a lot of the practical aspects in a hurry by working for him for a while.

    On the engineering side, I'm not sure TLAR is going to cut it. Maybe if you educate your judgement by looking at a whole bunch of successful boats that are similar, and find out what layup schedules they used where. Still, if you don't do the computation, you will either have weak spots or excess weight here and there.

    If you were building from good plans, and you worked up to it with smaller projects, maybe you could succeed.

    I've built boats from plans and books, but they were small and made out of plywood. After a couple of them, and having a mechanical engineering background, I could design and build another small one, but it's very simple and I'm sure it could be made much lighter with more analysis, or even with several prototypes for trial and error. . I guess TLAR can work if you're not going for the lightest weight. Of course, when going for the lightest weight, sometimes even experienced designers screw up. It's not like they know just what every load will be.

    It would be interesting to know just how someone like Dick Newick thought about these things.

    If you just want to BUILD, find a good design that already exists.
     
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