How big is a boat?

Discussion in 'Boat Design' started by JonathanCole, Jan 31, 2006.

  1. safewalrus
    Joined: Feb 2005
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    Location: Cornwall, England

    safewalrus Ancient Marriner

    What more can we say you've got ot all sorted out! why do I sense a but here..........:( :confused:
  2. Guillermo
    Joined: Mar 2005
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    Location: Pontevedra, Spain

    Guillermo Ingeniero Naval

    Thanks Jonathan,
    You gave me a lot to think about!
    I'm not sure about the meaning of this:
    'Inner circumference: 10850 feet'
    I'll work on your idea this weekend...hopefully.
  3. safewalrus
    Joined: Feb 2005
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    Location: Cornwall, England

    safewalrus Ancient Marriner

    What's that Gilly build one out of sticky back plastic and double sided tape?
  4. sigurd
    Joined: Jun 2004
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    Location: norway

    sigurd Pompuous Pangolin

    I don't see any skate and bike parks, and consideration for kiting and windsurfing.

    There would be space inside the lagoon to make cheap islands - they can be floating on rubbish, be decommisioned unseaworthy ships, or tied to the artificial reef. Your craft might have the potential to be a more diverse and open ended idea than the other ideas I have seen so far.

    If the barrier walls are sections tied together maybe you could increase the diameter as you go.

    I would like to get some idea of the nature of the loads it would see in biggest waves.

    I suppose that when the wave meets the first sections, they will be lifted by a force something like half that of an independent section, since the inside water level is unaltered?

    What if there is like a beach there, then the beach will be pressed down to counteract maybe?
    Have a look at this here wave plant:

    Anyhow, I'm curious how it's going to look.

    Did you ever hear of something I think is called seacrete?
    I read a bit about it years ago. It turns out that if you supply current between a noncorroding electrode and a conducting frame in seawater, a steel grid for instance, a concrete-like substance will grow on the frame.
    It was speculated it could be used to build artificial reefs for fishes to feed on. Structural properties were supposedly similar to concrete as well.

    As for politics I reckon you should have a revolution about every second year, but only paintguns allowed.
  5. westlawn5554X
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    westlawn5554X STUDENT

    Attached Files:

  6. ancient kayaker
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    ancient kayaker aka Terry Haines

    ... and folks say the contributors to this forum sometimes stray off topic!
  7. JonathanCole
    Joined: May 2005
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    Location: Hawaii

    JonathanCole imagineer

    Off Topic? How big is a boat? City-sized too big?

    Floating island idea shortlisted

    Published: 22 October 2009 11:00 AM
    Source: The Engineer Online

    A floating island city fuelled entirely by 'green' energy has landed a Portsmouth University professor of engineering a place on the shortlist of a national competition.
    Prof Carl Ross from the Department of Mechanical and Design Engineering has reached the final five of the ‘Britain’s Bright Ideas’ competition, which involved a national search for energy-efficient ideas, led by energy company npower.
    His idea to design a floating island city was the result of his passion for finding a solution to the problems of an overcrowded planet made worse by the threats posed by climate change. Ross believes that floating islands could provide extra space and produce enough environmentally friendly energy from waves, wind and the sun to support their needs.
    'There are many islands in the Pacific and Indian oceans that are only a few feet above sea level,' he said. 'If global warming continues and the sea level rises by about 6.7m as predicted, millions of people will be displaced.'
    Ross added: 'Some 71 per cent of the Earth’s surface is covered in water, so it makes sense for humankind to colonise the oceans for their benefit. If scientists and engineers are given the tools, we can find a solution.'
    His plan is for a city above sea level, supported on several concrete tubular pillars with a platform ‘resting’ on the top made of glass fibre, which is 50 times stronger than concrete under compression. Each island is designed to accommodate a population of around 150,000 and would incorporate all the facilities of a regular city, such as schools, a hospital, leisure facilities, services, industrial complexes and shops.
    Ross said: 'I’m thrilled to have reached this far in the "Bright Ideas" contest. I’ve always wanted to transform one of my ideas into a full-blown invention, so it’s great to have the support of some real experts. Maybe in 10 years everyone will be living on a floating island city.'
    He joins a shortlist of ideas from inventors up and down the country and his competition includes a bicycle-powered USB charger and a domestic water wheel.
    The winner of the competition will be announced later this month.

  8. James S
    Joined: May 2008
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    James S New Member

    Just happened on this thread...
    I've spent lots of time day dreaming about this..the technology does seem to exist.
    Any updates.
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