C Class Catamaran Design

Discussion in 'Multihulls' started by Doug Lord, Nov 3, 2015.

  1. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    For the first time ,that I am aware of, a C Class cat has been designed (built and flown)* with a single wand controlled main T foil and a single rudder T foil. It's been done by Team Invictus(UK).
    *apparently not built and flown yet....
    For those concerned about RM in such an arrangement , note the heel of the boat. Veal heel on a Moth can add up to 30-40% additional RM. For that to work on a cat you have to have enough altitude to heel way over to windward-and these guys seem to have it.

    http://www.yachtsandyachting.com/news/186458/Team-Invictus-launch-new-C-Class-Cat

    Look carefully at the picture and you can see both hulls and work out the wand, single daggerboard/main foil and single rudder:

    [​IMG]
     
  2. CT249
    Joined: May 2003
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    Location: Sydney Australia

    CT249 Senior Member

    Are you sure you don't mean "for the first time that I am aware of someone has done a drawing of a yet-be-built, yet-to-be-sailed and yet-to-be-flown C Class with Veal heel"?
     
  3. pogo
    Joined: Mar 2010
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    Location: Germany Northsea

    pogo ingenious dilletante


    Ja ja Doug,
    sehr lustig.

    Ever thought of giving back your driver's licence ?
    Ever thought about goggles with glasses as thick as the bottoms of coke bottles ?:)

    pogo
     
  4. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    ====================
    You may be right-damn good render if thats what it is..... Off yer Rocker was probably the first C Class to try to use Veal Heel:


    [​IMG]
     
  5. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Team Invictus

    --------------------
    Even assuming it's a render -it's a revolutionary new design with just a single wand controlled main T-foil and single rudder T-foil. You can't see that, Pogo??
     
  6. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    C Class Design

    Another C Class design from a guy in Southhampton, UK using rudder gantry's-apparently legal since Rocker used them but I don't remember the rule details:
    https://www.facebook.com/BRYachtingDevelopments/posts/1023319411041325
    ======
    This is what Steve Killing said about the rudder gantry's in his analysis of Rocker:
    To gain adequate separation between the underwater
    foils we added carbon “exhaust pipes” out the transom – a
    stretch of the class rules, but technically legal as we read
    them. Since the rudders hang off the back end of these
    extensions they had to be stiff in bending and torsion.

    [​IMG]
     
  7. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    C Class Design and Development

    Here is an early sketch by Norman of Invivtus showing how the entire rig and foil system slide side to side to increase RM:

    [​IMG]
     

  8. Doug Lord
    Joined: May 2009
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    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Groupama C for sale

    According to Steve Clark on another forum:

    Groupama C is for sale.
    Frank is concentrating on the AC and shutting down the C Class program.
    As I understand it, the chariot can be had for 400k euro.
    So "beating Frank" isn't really the point.
    Beating his boat is.

    SHC

    Beatings will continue until morale improves.
     
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