assymetrical blade will generate lift but at the expense of drag. A symetrical blade does strongly resist the sideways motion and creates much less drag. As an example: look at the H16 assymetrical hulls. There's no need for boards on these boats because the hulls themselves generate lift to resist the force of the wind trying to push the boat sideways. Typical centerboard (symetrical hulls and boards) boats will outpoint an H16 because they do not loose speed to the drag associated with the assymetrical hulls. <br> <br>Second example: look at the wings of a small Cesna airplane next to a jet. The jet's wings are much more symetrical to achieve more efficient high speed flight. The Cesna has more asymetrical wings to carry loads at slower speeds.<br><br>[color:blue][b]Jake <br>[color:blue][b]Nacra 5.2 (2112) <br>[color:blue][b]Hobie 18 (???)
