For the technical engineerting types out there, I have a question about these bannana boards. Seems to me the only reason we use daggerboards at all is to prevent sideslip, am I correct?

And for the past many years, the development of boards has been aimed at making the boards more efficient, in the way of lift vs. drag, is that correct? (please stop me when I get off track) and we are trying to get the boards to be as "high aspect" as possible, like the wing of a glider, to both prevent sideslip and also create lift to the windward mark, ie. upwind lift, (not lifing the boat out of the water), but keeping the boat from sliding downwind, as in better VMG to the windward mark, correct?

Now we see these curved boards, which seem to me to be a small step backwards in the whole development of higher aspect, better vmg type boards. Seems to me, with the board curved up under the hull, you are losing some amount of side-slip reduction, in the way of vmg to windward. As I understand these boards, their purpose is to lift the low hull up out of the water a little bit, never clear of the water, but up a little bit. But what about sideslip?

We see these boards on the ORMA tri's but they have a deep daggerboard in the center hull for vmg type lift, their bannana boards on the Ama's are to help keep from stuffing the ama's, or so I thought. They are not there to generate lift to windward, that is the job of the much larger, deeper, center hull daggerboard, or am I wrong here?

I don't see how bannana boards on a cat, with no other daggerboard to help generate vmg to windward type lift, will help you get to the A mark faster.

But I'm not an engineer, just a pilot who has never seen -curved- upward (or downward) wings. <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />