The thought behind gybing boards is that the board rotates along its axis (top to bottom) such that the leading edge is rotated slightly to windward while going upwind. This provides additional lift to windward while going upwind. Downwind you want them to do the opposite or be nuetral.

The trick is to make them behave this way automatically, which isnt easy, and make sure they dont get stuck in the wrong direction. Going along with both boards engaged in the opposite directions would be really slow.

Its interesting the the F18 rules allows gybing boards.

I was toying with just making the port dagger gybe so that I could engage it upwind on a starboard run and leave the other one alone, so at a minimum you would only have to deal with one board, and the risk of it gettting stuck in would be lower.

Has any other production cat come with gybing boards? I dont know of any. Have they been proven to be faster?

Bill