Pop bottle style pontoon

Discussion in 'Projects & Proposals' started by parkland, Nov 30, 2012.

  1. parkland
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    parkland Senior Member

    How come pontoons can't be made like pop bottles?

    Pop bottles are insanely strong!!
    And cheap!!!
     
  2. Submarine Tom

    Submarine Tom Previous Member

    I guess you've never dropped one while unloading grocerys.

    They explode!

    It takes 71 two-litre bottles to make a size 42 polyester 3-piece suit.
     
  3. rwatson
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    rwatson Senior Member

  4. jonr
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    jonr Senior Member

    What happens when the bottles get a few tons of barnacles on them?
     
  5. parkland
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    parkland Senior Member

    No i meant like giant pontoons, not a bunch of bottle tied together.

    Picture a giant pop bottle the size of a pontoon, but made using the same or similar technique as making a pop bottle.

    I wouldn't be surprised if the strength to weight ratio is better than aluminum, and I bet they could take a beating a lot better too.
     
  6. rwatson
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    rwatson Senior Member

    The closest equivalent would be roto-moulded kayaks and small dinghies. You dont see them much bigger than ~13 ft due to the complexity of the moulds and the lower strength as they get much bigger.

    Everything larger is cheaper and easier to build from the more usual materials, including aluminum.


    Pop bottles arent all that strong in larger sizes unless they are full of liquid or high pressure gas - they get flattened out when you stand on them pretty easily at their current size.
     
  7. rwatson
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    rwatson Senior Member

    They sink, and then drift off to pollute more of the ocean.
     
  8. parkland
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    parkland Senior Member


    I pumped one up to 40 PSI once and it was hard as a rock.

    1/8" walls and 5- 10 psi would make it uber strong!
     
  9. WestVanHan
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    WestVanHan Not a Senior Member

    What happens when you get a leak?

    I fooled around pop bottle rockets years ago-cheap pops would go BOOM at 85,many around 125 and some to 140-150.
    Anything over 60 I'd say is getting risky to handle/be close to.
     
  10. rwatson
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    rwatson Senior Member

    yes, but they aren't UV stable, are only a few MM thick so you cant fasten stuff to it, are easily punctured by sharp objects.

    Other than that, they are perfect :rolleyes:
     
  11. parkland
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    parkland Senior Member

    Well they could be thicker, and painted, or add a uv stabilizer to the plastic. :confused:
     
  12. hoytedow
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    hoytedow Wood Butcher

    2 litre carbonated beverage bottle lids are tested to 100 lbs at the bottling plant. After that the lid blows of with explosive force. The bottles fail before that.
     
  13. upchurchmr
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    upchurchmr Senior Member

    Parkland,

    Do it, show us.
    If you don't want information don't ask the question.

    Just do it.

    The material never gets any better when you make it thicker or paint it or any thing else, unless you cover it with fiberglass so the fiberglass takes all the load.
     
  14. rwatson
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    rwatson Senior Member

    Yes, of course they could - then they would be like the roto-moulded boats I was talking about earlier, with all the weight, complex moulding problems I talked about earlier.

    Then, my persistent friend, they would not be competitive with aluminum, wood, FG etc as I also mentioned earlier.
     

  15. PAR
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    PAR Yacht Designer/Builder

    Oh my . . . paper mache composite seems up next.
     
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