I checked with Marstrom and right now ISAF have the "old rule" which stated that hydrofoils are not allowed and nothing more. But there are a new rule which states the tip distance and that the centerboard must be flush with the hull when fully rectracted. That means that you can get 0.4 m lifting surface from each centerboard and rudder and that could be enough to foil. The new rule was sent to ISAF yesterday!

Is would be interesting to know what rule that was in effect during the Europeans, the one at ISAF maybe?

If the statement "hydrofoils are nor allowed" is still there in the new rule you could still file a protest if someone is "flying" but otherwhise we have just made hydrofoiling a lot more expensive since we need to bypass the new rule.

/hakan