Evolvement of foiling sailboats over the last 70 years

Discussion in 'Sailboats' started by Angélique, Feb 4, 2019.

  1. BlueBell
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    BlueBell "Whatever..."

    It helps being in red print, it says DO NOT READ to me.
    Thanks Doug
     
  2. trip the light fandango
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    trip the light fandango Senior Member

    For a genuinely interesting real life well written take, go to Sailing Anarchy and check out Blunteds take on his experience. The thread is on retrofitting T foils. Nothing like a donald trump repetitive rant, a breath of fresh air.
     
  3. Angélique
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    Angélique aka Angel (only by name)

    Doug Lord likes this.
  4. OzFred
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    OzFred Senior Member

    More likely this one: Foils / Wings - Aftermarket installation?

    Just on the Off Yer Rocker experiment, it was limited by the C Class rule for max beam. The hulls were moved closer together so that the outer tips of the main T foils were at max beam, the hulls weren't so max RM was limited and they didn't use downforce on the windward foil either (maybe a class rule?).

    So "not quick comparatively" is in regard to a full width C class with C foils.

    A wonderful article from someone who has actually developed and sailed foiling boats at an elite level.

    There is also this: trickle down http://forums.sailinganarchy.com/index.php?/topic/156835-trickle-down/&do=findComment&comment=6517781
     
  5. trip the light fandango
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    trip the light fandango Senior Member

  6. trip the light fandango
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    trip the light fandango Senior Member

  7. Doug Lord
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    Doug Lord Flight Ready

  8. Doug Lord
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    Doug Lord Flight Ready

  9. OzFred
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    OzFred Senior Member

    Dunno whether the Waydoo counts as evolvement, trickledown or just a fun application of well known technologies made possible by better batteries and Bluetooth.
    [​IMG]
     
  10. Angélique
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    Angélique aka Angel (only by name)

    They could as well look for some waves, and ditch the batteries and motors, and have even more fun . . .

     
  11. trip the light fandango
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    trip the light fandango Senior Member

    That really does look like fun, there's quite a few over here. The foil operates really well because the wave action is so consistent and therefore controllable. travelling along on a craft that could harness the power of a single wave out in deep water would be a surreal experience.It 's mainly the sail and the lack of certainty/ nature of wind and running across or into multiple waves that makes foilers so unstable. Light weight is the common theme. Maybe that is where the evolvement of foiling will settle , long passages keeping up with a single wave then hopping to a fresher one in suitable conditions, with little or no sail assist.
     
  12. CT249
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    CT249 Senior Member

    The "low performance" foiling does open up interesting possibilities. I actually like the approach of the guy who fitted a foil to his Puddle Duck Racer or Oz Goose; both of them plywood boxes with sprit sails made from tarp materials. You can foil a bit in ideal conditions pretty easily and, from his experience, cheaply. Trying to foil at higher speeds, in lighter winds or upwind can enormously increase the cost, complication and crash issues. So just accepting that you can only foil in a limited range seems to possibly give a lot of the experience while reducing a huge amount of hassle.

    On the other hand, there does seem to be a lot of noise about what guys like Kai Lenny can do. The issue is that what Kai etc can do (as in this vid World Surf League https://www.facebook.com/WSL/videos/295399197746355/ ) is of course utterly impossible for mere mortals,so vids showing experts like that can be very misleading about the possibilities for the normal user.
     
  13. OzFred
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    OzFred Senior Member

    As long as the wave is big enough, and going in the right direction, and you have enough power to get up to foiling speed, and it's scalable to a 10m or 20m craft. :)
     
  14. Doug Lord
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    Doug Lord Flight Ready

    Last edited: Mar 1, 2019

  15. OzFred
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    OzFred Senior Member

    I wish you would stop reposting material that you've already posted many times in other threads. By all means post a link to it elsewhere, but don't fill threads with the same old content. Without any comments to add to the discussion it's just decoration.

    The F101 is a refinement of 20 year old foiling concept that has been applied to a number of other boats, including the Glide Free system. It confirms the notion that foiling systems themselves have evolved slowly and incrementally over decades and that the increase in the variety of foilers is mostly due to the lower cost of the high–tech materials required to manufacture them in sustainable quantities.

    It seems to be based on a Moth with outriggers so as to make the boat easier to learn, using a wand system based on the one used used for the WindRider Rave (and a number of other products subsequently).

    The most recent innovative feature is the J foil configuration developed by ETNZ (approaching 10 years ago). But that is now evolving to an L foil with active control. I though the J foil development was interesting and significant as it has the potential to greatly simplify foiling systems, however the shift in focus to L and flapped T foils has put the emphasis on external systems for altitude control. That, to me, is a backward step if the goal is to have a simple and effective foiling system. It does show however that J foils are fundamentally slower than other types and are avoided where performance has a higher priority than simplicity (and possibly practicality, but that's moot).
     
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