A new solution to rough water??

Discussion in 'Boat Design' started by Barry, Oct 14, 2020.

  1. Barry
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    Barry Senior Member





    Velodyne Marine just a few of the videos
     
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  2. fallguy
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    fallguy Senior Member

    Interesting. I wonder if there is a downside in the heavy heavy stuff.
     
  3. brendan gardam
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    brendan gardam Senior Member

    there is a cat in western australia with suspension thats been running around for a few years now.
     
  4. brendan gardam
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    brendan gardam Senior Member

  5. Mr Efficiency
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    Mr Efficiency Senior Member

    It isn't a new idea, that cat with a suspension, but one senses that hydrofoils are the thing that will eventually be the solution to optimizing ride.
     
  6. clmanges
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    clmanges Senior Member

    Maybe nice as long as they can maintain flying speed, but everybody has to slow down sometime, and it may be in busy water. The suspended cat works (within its limits) at all speeds.

    What are the limitations on foils, in terms of wave height and frequency? If a foil boat jumps a wave (or a lot of them), are the foils robust enough to survive the pounding?

    A possible failing of the suspension craft: I noticed that the suspension kept the cabin level at all times, but couldn't always mitigate vertical acceleration, which I've read was the main cause of sea-sickness.

    Further, I'm curious about the suspension-cat's failure mode; will it work passively to some extent? I'd think the pneumatics could be set up that way.
     
  7. BMcF
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    BMcF Senior Member

    That's certainly been my experience over time. But hydrofoil craft still have an operational limit dictated by sea state and the problem with that limit is that it's a rather abrupt "wall", whereas with more conventional vessels, the operational limits are seen and felt in a more gradual manner most of the time...the craft can be slowed and heading changed.
     
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  8. brendan gardam
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    brendan gardam Senior Member

    Did I say it was a new idea. Do.you have a link to the other suspension cats. If hydrofoils are the future where have they all gone. There used to be plenty of hydro ferrys but not anymore.
     
  9. BMcF
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    BMcF Senior Member

    The 90s passenger vessel designs always struggled to be economically viable, in spite of their often amazing performance. The Boeing designs, in particular, were very expensive to build and operate. But hydrofoils are "not dead yet"...there are several projects underway to develop "green" ferry designs for short-run commuter application. There are also a number of military/naval projects using hydrofoil craft.
    Interestingly, this year marks the 50th anniversary of the founding of the International Hydrofoil Society..an organization that I've been a member of for about 33 of those 50. ;-)
     
  10. jehardiman
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    jehardiman Senior Member

    Meh, small scale and old hat. It is a truism that every decade or so people give old technology some new paint and polish and trot it out as new. See the Ugo Conti/Jim Antrim 2005's 100 ft LoA PROTEUS WAV-M.
    Marine Advanced Robotics - Proteus http://www.wam-v.com/proteus

    Also this thread.
    what is it? https://www.boatdesign.net/threads/what-is-it.14196/#post-109568

    and Latitude 38 and news articles
    October 6, 2006 http://www.latitude38.com/LectronicLat/2006/1006/Oct06/Oct6.html#anchor1085433
    Ugo Conti Sees the Future of Ocean Travel | East Bay Express https://www.eastbayexpress.com/oakland/ugo-conti-sees-the-future-of-ocean-travel/Content?oid=1083801
     
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  11. Mr Efficiency
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    Mr Efficiency Senior Member

    I think it is obvious from foiling sail boats, that there is plenty of potential left in hydrofoil power craft, the most obvious disadvantage is the lack of a "clean" uncluttered exterior, it is like taking the clothes hoist with you when you go on holiday. A completely foiling power boat is more difficult than a sailing one, as the drive has to be in the water, so gaining height above the water, to clear waves, is impossible without a complex retractable drive and foils, or even a small hydrofoil would be drawing a couple of metres of water when stopped. Hence such things as the Boeing Jetfoil, where the drive is above water.
     
  12. brendan gardam
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    brendan gardam Senior Member

    You win mate. I will not participate in the forum any more. That will save you shooting down every post I submit.
     
  13. Mr Efficiency
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    Mr Efficiency Senior Member

    You seem, erroneously, Brendan, to imagine you are the subject matter of threads. Paranoid reactions from you that every post I make, is a rebuttal of something you said, is something I have no control over. My last post had little or nothing to do with your posts. My first post was actually agreeing with basically what your posted picture implied, that the idea of the cat with the "suspension", was not a new idea ! You need a holiday !
     
    Last edited: Oct 15, 2020
  14. Mr Efficiency
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    Mr Efficiency Senior Member

    You're the expert, the hydrofoil boat would be the norm if it ticked all boxes, but it ticks some very well.
     

  15. portacruise
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    portacruise Senior Member

    SWATH is another way as well, and I think there's still one operated in Hawaii. Which one of these 3 Technologies do best with a roll?
     
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