Deboichet Twin-Slalom?

deboichet twin slalom


No I am not good with photoshop!!

I don't have a clue what these can do or are ment to do. Maybe mr. Deboichet is trying to push limits, or he is just trying fooling some guys. A lot of work for a joke... This fin (beside the little foil) looks to me as a Deboichet SL4

Some short thoughts

  • Maybe he is looking for more surface vs lenght?
  • a better momentum?
  • maybe like the mirrors of a f1-car... optimilisation of flow in extreme conditions
  • ...

Still I think it is a 'late' 1 April joke, does anyone know more?



Erik Loots

Erik is windsurfer for 10+ years. In his daily life he is professional in construction dewatering, advisor, troubleshooter. Erik likes adventures, explore and to challenge himself. During his life he is trying to get the best out of it and have respect for the earth, nature and future generations. The modern world is about sharing, in this blog Erik shares his experiences, selfreflection and lessons learned.


  1. There is another photo on the Deboichet website, maybe not a joke?

  2. Hey Robert,

    For speedsurfing I don't see any advantages, even if the flow is 100% optimized in front of the leading edge.

    It has to be a practical advantage like more power in lightwind for bigger sails on smaller boards? I guess with good testing this fin hasn't have any chance against a good "normal" fin, but we will see...



  3. Well, just my 2 cents:
    Aircraft wings have front flaps that allow air to flow between the flap and the main wing. This is used for landing. It prevents stalling. So yes, it will work at low speed to prevent stall/spin-out. But probably not usefull for more topspeed.

  4. windsurfing hawai made it like this in the 90's , i had one , us box

  5. Certain it had been an excellent weekend break!, I am pleased for you personally!, your own ensemble is actually georgeous!

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