Quant 23 Foiler Scow

Discussion in 'Sailboats' started by Doug Lord, Jun 8, 2015.

  1. Doug Lord
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    Doug Lord Flight Ready

  2. Doug Lord
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  3. Doug Lord
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  4. Doug Lord
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

  5. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 Foiling Scow Keelboat

    Some interesting facts about this boat so far:
    1) takes off in about 5 knots of wind,
    --
    2) in 7-8 knots of wind boat speed can hit 19-20 knots,
    --
    3) can be sailed and foiled singlehanded!
    --
    4) foils upwind in 8 knots of wind at a speed approaching 15 knots.
     
  6. jonas a
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    jonas a Junior Member

    1) a bit sceptical that it could reach sustained full foiling in 5 knots of wind. I think it was closer to 8. At least that was what I could find in the articles and videos available
    3) although it probably can be foiled singelhanded, it will be far from ideal.
     
  7. CT249
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    CT249 Senior Member

    Not only is it not ideal, it's hard to see that it's a big deal to foil singlehanded in the conditions pictured in the video. In those conditions, you could sail an F18, 49er, FD or Tornado cat singlehanded fast and easily - but you can't sail such boats singlehanded on a typical weekend in many places in the world because the conditions are rarely that perfect. So of course, what that video shows is largely irrelevant to much of the world, where sailing is done in much more difficult conditions, with gusty winds, big chop, lots of traffic and wind shifts, tides, difficult launching and all the rest of the real-world problems.

    You've also got to wonder why the video only went for 13 seconds.
     
  8. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 Foiling Scow Keelboat

    =====================
    This is from the Quant 23 website: and is backed up by Michi(the builder) and Hugh(the designer) :

    We sailed upwind that the day - just the two of us - when Roger suggested to bear away, trying to foil under kite. He obviously did that before, when i got stuck in the office. I thought he is joking - but we did and then somebody took this pic! I estimated 4kts true around my nose - a sailing coach nearby on a RIB told us later about the measured true windspeed in over 2m above waterlevel: 3.5kts!
    I am fully aware that you never know about the layers of wind higher up in the rig. But however, foiling in these condtions is new i guess. And A-Cat and Moth-Sailors in the neighbourhood said that there was no way to get up and going (a bit later we actually passed one of the latest type of foiling A-Cat on leeward, coming from behind).

    ===============
    It's not a question-it surely was foiling singlehanded in the video. And what does "ideal"mean? For the person doing it ,it was probably ideal as hell and great fun!!
    Hugh has pointed out that the boat foils upwind in 8 knots of wind-at near 15 knots boat speed. Thats the same amount of wind it takes the new UFO to foil off the wind. There are very few foilers that can foil upwind in those conditions. And it will do 20 knots offwind in 7-8 knots of wind!

    =====
    [​IMG]
     
  9. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 Foiling Scow Keelboat

    ===================
    Thats just nonsense. For much of the world the boat can be singlehanded in the right conditions-that's what the video shows-no more, no less.
    ---
    And why would that be?!
     
  10. Doug Lord
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  11. CT249
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    CT249 Senior Member

    Doug, the point is extremely simple - almost any boat can be singlehanded in such conditions, therefore the fact that the Quant can be singlehanded in such conditions is of little relevance. It's not as if people were betting that no one could singlehand a Q23, and this was proof that they were wrong.

    Secondly, what can be done in ideal conditions is irrelevant in the many places in the world where such conditions are extremely rare.

    The significance of the short vid is that there is no evidence that the Q23 can be foiled singlehanded for a longer period.
     
  12. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 Foiling Scow Keelboat

    The fact that this boat is an entirely new type of sailboat-a foiling keelboat scow with a foil system that prior to June of last year had never successfully been used on another sailboat -makes the fact that it can be singlehanded significant.
    Further, the reason it can be singlehanded is because of its extremely simple and reliable foil system that not only generates vertical lift but creates tremendous righting moment. The foil system has almost nothing in common with any other foiler anywhere-except the Flo 1 which has many of the advantages of the 23. It is ease of handling, tremendous righting moment and reliable foiling that makes it possible to potentially singlehand in thousands of locations across the world should an owner want to.
    I'd bet this is one of the only foilers in this size range that can be easily singlehanded.
    Your last sentence is one of the most absurd comments you could possibly have made. The video shows the boat under complete control going fast and there is no reason whatsoever to assume that the boat couldn't be foiled for a much longer period.
     
  13. Skyak
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    Skyak Senior Member

    The point of the video is to make people want to sail the boat -and it worked!

    The earlier videos of "low wind foiling" threw me off a bit. I don't associate "low wind" with crew out on a trapeze. I suspect that it is hard to foil the Q23 singlehanded in light wind because you need speed for righting.
     
  14. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 Foiling Scow Keelboat

    ----------------------
    Actually, it's extremely easy according to the people that have actually done it.
    The RM matches the requirement of the boat with two crew throughout the wind range. So singlehanded in stronger wind would require depowering/reefing earlier.
     

  15. CT249
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    CT249 Senior Member

    Doug, the simple fact is that the video does not provide proof that the boat could be foiled singlehanded for longer than 13 seconds. I did NOT say that there was proof that it couldn't be done. However, in the last couple of seconds the boat appears to be coming off the foils and IMHO looking at the angles it appears that it is likely (and note that I am merely expressing an opinion about what I believe to be likely) that it did so.

    There are plenty of things that can be done under complete control for 13 seconds, but not for a much longer period. Plenty of people can mono a bike for 13 seconds, railride a windsurfer for 13 seconds or balance a pool cue on end for 13 seconds, but not necessarily for long periods.
     
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