Still looking for information any technical-engineering data would be welcomed. Are the boards on the A-Cats Asymmetrical?
I think it was pointed out in the commentary from the AC that curved boards is a way to improve performance so there is going to be development in the whole concept of curved boards in an engineering aspect.
Until then the old way of build and test will have to do. On the prototype I think I like Jake's idea of making a trunk that will accept both type of boards. Then I can tell which is best.
I believe the Flyer boards are symmetrical. Sym. sections do generate lift as a function of their angle of attack...most aerobatic airplanes have a symmetrical wing section and they fly just fine. An asymmetrical foil doesn't generate lift as well when inverted (which is why most aerobatic planes have a fully symmetrical wing). You do depend on your daggerboards to provide lift on both sides depending upon which tack you are on. However, the marstrom curved daggerboards, which have also proven to be pretty quick, are asymmetrical and conceptually mostly rely on the leeward board to provide the lateral resistance for sailing upwind.
