Body of sailboard - has concave keel along half its length, reducing amount of spray by altering direction of currents

摘要

The body (1) has a keel (2) that is concave longitudinally. The concavity extends along approximately the back half of the body. The angle of attack of the body is reduced compared with the angle of attack of the hull. - The shape of the sailboard varies along its length, which effectively varies the direction of the wavelets with a maximum pressure near the attacking edge and a minimum at the leak edge.