Levi Dart 38

Discussion in 'Boat Design' started by Flysafe, Sep 25, 2020.

  1. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Hello all,

    The boat was built by Renato Sonny Levi in 1970.
    Some time ago I saw this boat on a group on facebook, so I decided to do the design, it's not been easy because of the lack of information but I can deal with it. It's not my first. I already know there exists one model here in the forum. The work at this moment is tweaked here and there in the lines until everything makes sense.

    dart-38-cop-1.jpg
    Dart 38  005.jpg
    Dart 38  010.jpg

    All the best,
    Jorge Lopes
     
  2. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    What do you mean, "do the design" ? You intend to build one ? Are no plans accessible ? Years ago I had a book by Levi with a lot of lines drawings of his boats, but don't recall that one being in it. The thing I recall is that he was fond of slightly convex sections throughout, a device I think he explained as an aid to getting a stiffer structure.
     
  3. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor

    That must be his iconic work 'Dhows to Deltas' - what happened to your copy Mr E?
    I hope that you do still have it somewhere - I remember even 30 years ago it was very rare, and much sought after - one of my jobs in the design office I worked in then was to photocopy the whole book so that the office could have a file copy, as it was not then possible to buy a 2nd hand copy (but my Boss managed to borrow one temporarily).
    Now they are selling for sums in the region of US$ 500 on Amazon -
    https://www.amazon.com/Dhows-Deltas-Renato-Levi/dp/0245599568/ref=sr_1_1

    Amazon also have his book 'Milestones in my designs' for a mere US$ 368 -
    https://www.amazon.com/Milestones-my-designs-Renato-Levi/dp/B0006F1Z1M/ref=sr_1_2
     
  4. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    I may still have it buried away somewhere, and I think I was "Dhows to Deltas" too. Surprised to hear it is worth that much. Probably from the late 1970's. Thanks for the tip !
     
  5. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    When I say do the design it's my design through the information that I can find, as I know and for my research I can find any plans or part of it. After the accident the boat in 1972 it was dismantled
    My idea is after I finish the design build a rc model.
    When I do the research I found that I have at least one book that talks about this boat. I don't know if it is all book or partial, but I would like to read it too, big problem if I can say the price I can reach.
     
  6. Mr Efficiency
    Joined: Oct 2010
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    Location: Australia

    Mr Efficiency Senior Member

    I have a lot of old stuff packed away in cardboard boxes. I had a look in some of the more accessible ones, but could not find the book, however I do not recall seeing the lines plan of that boat, or recall the name, when I read it many years ago. And my memory is reasonably good. I think the step would have drawn my attention. There were a few boats where multi-conic development was shown, but as I mentioned, a lot of boats I saw were designed not with straight sections anywhere, but convexity that "softened" the transition from bottom to topsides. These were designed for cold-moulding veneer, and the shape was to get stiffness. I never saw any hollow flared bows, either.
     
    bajansailor likes this.
  7. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    This boat was built with fiber and carbon fiber in 1971, for the time top material, he had two tanks forward one for fuel and another for ballast.
    I have another model similar to this one from another time around 1940 also a prototype boat too.
    Some progress the lines are in the position that I want but need more work because the surfaces are not quite fluid.

    Dart 38  011.jpg

    The other model that I talk about, a concave hull.

    5.jpg
     
  8. Flysafe
    Joined: Oct 2009
    Posts: 47
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Hello all,

    I need help with my boat design, I would like to know your opinion, I found the picture on the image and I see a step between the deck and the seam, I draw the deck the step and the seam, but the opposite side I draw the starboard and the seam without the step. This is right the manner I did it?

    Pergunta.jpg
    All the best,
    Jorge Lopes
     
    Last edited: Oct 3, 2020
  9. Flysafe
    Joined: Oct 2009
    Posts: 47
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Hello all,


    I have been working to adjust and refine the lines. I work in a full size model. The need to move a line sometimes is very small, here is the proof.

    Dart 38  016000.jpg

    All the best,
    Jorge Lopes
     
  10. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Hello all,

    First lines of the spray rail have a lot of work needed to do. The lines between the hull and starboard are done and straight. Dart 38  017.jpg

    All the best,
    Jorge Lopes
     
  11. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    How crazy it is align dots, this is fun, truth.

    Dart 38  019.jpg
     
  12. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Spray rail completed, next, draw the step.
    A few renderings of my drawing.

    Dart 38  020.jpg Dart 38  021.jpg
     
  13. Flysafe
    Joined: Oct 2009
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    After many adjustments the spray rail it's completed, as well the step.

    Dart 38  022.jpg
     
  14. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor


  15. Flysafe
    Joined: Oct 2009
    Posts: 47
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    Location: Lisbon/Portugal

    Flysafe Junior Member

    Thank you, as you know the information about this boat it is almost none, until I can find some more information it will stay as it is, later if I find or a drawing or something else, I perform the changes.
     
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