The quickest mode is in the middle part of the video, where we are twin trapezing downwind, the leeward board is up a little bit and the windward board is up a lot more.
Why bother then to put curved boards on then if the quickest part is when the boards are raised somewhat, you would be better off with inclined boards in that case.
The A camp has the curved boards in the not sure camp still and many are complaining of the number of broken boards + the time needed to raise one board to get best effect, Me thinks the jury maybe still under deliberation.
As to the minscule little bit of " jump " mode followed by immediate slow down of the boat ( induced drag of the foil breaking back into the water is more than if the foil was in the water ), nah find a boat wake and then you would see some real air time .
We raise the boards a little bit depending on the wind strength, we start off with the board down and then once you are trapping fully downwind, then we raise it a little and then we go back down fully in really windy stuff. Also wave state plays a part in the balance too, so its a lot more complex to get the most out of the boat compared to a F18 but the reward is a very quick machine.
The reason the A class guys are not fully converted to the curved foils is for a number of factors:-
1. The limited amount of foil curve/length allowed under the rule
2. The A cat is narrow anyhow and the curved foils reduce the righting moment even further
3. The A cat is not adding any sail area downwind and as such the foil effect is not as apparent.
We had 2 M20's which were identically rigged and both had interchangeable daggerboard slots, we did many, many hours testing and the result was very clear: The Curved board boat was always quicker.
And Inclined boards are not even close to as good as the curved boards in that application. We have some pretty good designers... and from their assessment it wasn't even worth exploring.
In the video we are just playing around with the boat, jumping it a bit and having a bit of a laugh. When you have the boat in full speed mode, it looks pretty boring.. just hammering along faster than you think is decent for any sailboat!
