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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    Doug Lord Flight Ready

  3. sigurd
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    sigurd Pompuous Pangolin

    Love the voluptuous yet slender and pointy catascow, except what you did to the bows when you took away the deck. In the old days bows were made to resist submerging. Modern, reverse bows are so good because they can resurface easily, and because they have little drag when submerging, making the stop slower and a recovery possible.
    You seem to have made a big scoop with a powerful downwards force, should it ever find itself under water. Also, what of the poor, soaked wet hamster crews in the cockpit?
    Side note, the bow wing may help, but then dynamic lift always comes with drag, exaggerated at slow speed, and in a pitchpole, the boat is verily stopping, making lift induced drag seem an issue - and it is drag that is tripping the boat. Hard to say, interesting to see.

    ps. I think your catascow is going to be faster than the quant - voluptuous, yet slender pointy things they are.
     
  4. Doug Lord
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    Doug Lord Flight Ready

    Dominion 2-HW

    Thanks, but I don't think the midship section will ever see the water. This boat is a self-righting foiler that will foil in a 5mph breeze(4.35 knots). Don't have to worry about big waves because, like any scow, it will be sailed in conditions that suit it.
    I've used a +6 degree forward wing on models 20 years ago-and it works 95% of the time-but on this boat I imagine it will rarely get its chance.
    We'll see!
     
  5. sigurd
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    sigurd Pompuous Pangolin

    Not just the midship section, the bows insides too. It's ok to make a boat that only work in flat water, but do you have a reason for those features? What if I got me a scow, for sailing in a fjord, then there comes a motorboat, or the wind is from the long side of the fjord, I pitchpole, then I'd like to say, well ok, not the best rough sea hull, but it is like that for x reason.
    I mean, it's a model, I don't have a contention - it'll be interesting to see what happens.
     
  6. Doug Lord
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    Doug Lord Flight Ready

    D2

    There isn't a problem-the little side "lips" lift with any waves and the midship section is too far back to be a problem especially considering that the foils will be lifting in virtually all conditions. This thing isn't limited to just flat water any more than a normal scow is and -again- the foils change everything. The foils dictate the conditions the boat can sail in not the hull.......

    The reason for the shape is that I had originally designed the boat more like Dominion with a full deck but after I got the thing started it seemed like that was just too much and would accomplish nothing but adding weight. So I spent a lot of time trying to figure a way to get rid of the extra weight and windage(when 90 degrees) and came up with this after many, many hours of trying to find a solution.
    The pictures below show what the original design would have looked like:

    click on picture for larger-
     

    Attached Files:

  7. Doug Lord
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    Doug Lord Flight Ready

    D2

    And finally this:

    [​IMG]

    [​IMG]
     
  8. Doug Lord
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    Doug Lord Flight Ready

    Quant 23 and D2 foils

    Foils from the top: 1) production Q23 foils, 2) Q23 proto stb foil, 3) D2 stb foil, 4) D2 foils, keel + rudder:

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  9. sigurd
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    sigurd Pompuous Pangolin

    Ah yes - in that case I like how you solved it.
     
  10. Doug Lord
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    Doug Lord Flight Ready

  11. Doug Lord
    Joined: May 2009
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    Doug Lord Flight Ready

    Quant 23 Inspired Dominion 2-HW RC Foiler

    Getting more done:

    [​IMG]
     
  12. Doug Lord
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    Doug Lord Flight Ready

  13. Doug Lord
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    Doug Lord Flight Ready

    D2 with "B" Rig and Foils

    Making Progress-smaller of the two rigs. The main is reefable and jib is removable so you could call this the "B" and "C" rig:
    [​IMG]
     
  14. Doug Lord
    Joined: May 2009
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready


  15. Doug Lord
    Joined: May 2009
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    Location: Cocoa Beach, Florida

    Doug Lord Flight Ready

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