Foiling Windsurfer: New AFS French Design

Discussion in 'Sailboats' started by Doug Lord, Dec 14, 2010.

  1. Doug Lord
    Joined: May 2009
    Posts: 16,522
    Likes: 291, Points: 93, Legacy Rep: 1362
    Location: Cocoa, Florida

    Doug Lord Flight Ready

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  2. yagon
    Joined: Nov 2009
    Posts: 8
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Sydney

    yagon Junior Member

    Very interesting. A question I have about the foiling windsurfer is whether it can go upwind effectively.

    The issue that I see with foiling windsurfers is that there are too many degrees of freedom to provide usable lateral force to drive upwind. That is, with the universal mast joint, the board rotates/twists when large lateral forces are generated by fins.

    There are 2 sailboard designs that go upwind well, both of which rely on the force/lift of the board on the water to resist with twisting force:

    1. Formula boards. The lift on the leeward section of the board around the fin provides lift to counter the twisting force.

    2. Raceboards. Again, the board provides lift to counter the lateral force of the fin. Given the narrow width of the boards compared to formula boards, the board 'rails'.

    I believe that kiteboards don't have this issue with degrees of freedom because of the boot-style fixtures, but I'd like confirmation of this.

    Can anyone comment on the effectiveness of foiling sailboards in terms of going upwind?
     
  3. Doug Lord
    Joined: May 2009
    Posts: 16,522
    Likes: 291, Points: 93, Legacy Rep: 1362
    Location: Cocoa, Florida

    Doug Lord Flight Ready

    Foilers!

    You might e-mail the guy who does the French site "Foilers!"-you can find contact info here. He was among the first to publicize this foiler windsurfer and knows at least one of the guys involved.

    http://foils.wordpress.com/
     
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