Unsinkable Yacht Project

Discussion in 'Boat Design' started by Herry, Jan 7, 2002.

  1. Herry
    Joined: Jan 2002
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    Herry New Member

    I was interested to a Project, it called " Unsinkable Yacht Project ". Because of I never learned yacht design before so
    I would like to know anyone opinion about this project.

    Actually I already have the idea, The Yacht haven't sank even
    the hull have split in accident. Maybe it hard to believe but
    I was confident it would possible.

    To make it come true I need help and support from some
    experts in Naval Architecture and Marine Engineering to help
    me to do some research and build the yacht.

    Unfortunately it impossible for me to funding the research.
    If the the research succesed I willing to sharing patent right.
  2. Gades
    Joined: Nov 2001
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    Gades Senior Member

    Hi Herry,

    there are quite a few unsinkable yachts. For example, in Spain they build many day sailors (usually 20-24 feet) that are unsinkable. You can find larger yachts, like the Distancia 60 (as you may guess, it's a 60 footer, that's about 18 meters), which are unsinkable as well.

    All you have to do, is to inject some low density foam into the hull structure. So that even if the yacth is completelly full of water, the light weight of the foam will be enough to compensate the weight of the water inboard. This is just s simple explanation, if you need some more, please let me know.
  3. Polarity
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    Polarity Senior Member

    ... I worked for 2 years on a 35m power yacht that was Divinicel (spelling??) cored construction. She was calculated to be unsinkable. Fortunately we never had to find out. :)

  4. Robert S
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    Robert S New Member

    You might look at the norwegian Navy's SES boats. They are supposed to be unsinkable even if both hulls should be destroyed. Basically there should be enough boyancy in the sandwich construction.

    Attached Files:

  5. zcg0085
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    zcg0085 Junior Member

    building an unsinkable boat is like naming her 'titantic'. if water gets in and the gross weight exceeds the bouyancy...she will will sink. remember things like engines ,bolts and nuts, people and canned food (and the like) all sink, and are all commmonly found on boats . all the core that one could add to the hull wouldnt be enough to float the glass and resin used to encapsulate her much less all the items on board (an average boat) with a density greater than water. boats float because of their 3d shape. Yokebutt could be correct for a sailboat with nothing but a deck and mast.
  6. yokebutt
    Joined: Aug 2004
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    yokebutt Boatbuilder


    Robert is quite right, a couple of good friends of mine designed an open 50 a few years ago where they increased the core thickness to provide enough bouyancy to float the boat completely water-logged. makes for a exceptionally strong hull too.

  7. Sander Rave
    Joined: May 2005
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    Sander Rave Senior Member


    I have something in mind for a long time, a little like Polarities I guess. I see some great advantages in milling a hull/ship from foam material. It can be something like PSfoam. It can be milled right from the CAD files.

    By using some plywood or laminated cross sections and reinforced hullstructure like foamcore builing, you can build a very strong and lightweight construction.

    Advantage is you take away material to create storage and cable guidance. Disadvantage is you lose storage space.
    The bottom line is an ultra light and stiff foamcore construction.

    Just an idea that can help you a bit further?

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    FAST FRED Senior Member

    Go purchase any US Navy Utility Launch.

    40 or 50 ft and unsinkable due to a foam filled colar all round the boat.

    Eats a bunch of space as its about 2 ft wide and 3 ft deep .

    For the price you also get fire retardant resin , probably a more usefull feature on any cruising boat .

    FR resin is not usually used on yachts as it coats 2c a pound more than std.cheap high flaming resin.

  9. Bergalia
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    Bergalia Senior Member

    Not exactly a yacht - but I believe she was claimed to be 'unsinkable'...:(

    Attached Files:

  10. cyclops
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    cyclops Senior Member

    Thanks for bringing everyone back to the real bussiness world, Fred. They will kill you for 2 cents a pound. Feel better about quality yachts now?
  11. yokebutt
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    yokebutt Boatbuilder

    There was a line of boats made with FR resin a couple or three decades ago, absolute bloody nightmare, they blistered to the point of severely compromising the strength of the hull.

  12. yokebutt
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    yokebutt Boatbuilder

    Hey, how about a Snark? You can break it up in a thousand pieces, and it still won't sink.

  13. longliner45
    Joined: Dec 2005
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    longliner45 Senior Member

    airex is stronger than fiberglass and it floats i fished in the gulf of mexico for 10 years on a 31 ft jc boat she had a6000lb ice box in the center and twin volvos with duoprops and13 airtite compartments andself bailing engine rm
  14. safewalrus
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    safewalrus Ancient Marriner

    Hey Bergalia nice to see you finally got to use that picture of your second ship :rolleyes: (Noah was skipper on the first one, I believe!):D

  15. longliner45
    Joined: Dec 2005
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    longliner45 Senior Member

    hey ,didnt mean to mislead you , our hulls were airex sandwich construction .one of our boats was swamped but did not sink , also with 13 airtight compartments blown with foam helped,
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