....Another point to take into consideration is the claim that the nacra 20c uses ASYMMETRICAL curved boards whereas other makes like F18 and F16 still use symmetrical boards. If so that will explain the length of these boards and the need to each time raise the windward one. It is doubtful whether the speed gain will offset the time spend working the boards in a crowded fleet race. Of course these things change in a distance race.
The F20 C's boards are symmetrical NOT asymmetrical as some people claim.....I will have a chat with Gunnar Larsen and Peter Vink when they return from Thailand next week about the full reasoning for lifting of the boards upwind (particularly the windward board) and will post their response here..