Abstract: A sail shaping arrangement for a sailing craft as a sailboard is described, the arrangement associated with each of the sail battens. The shaping arrangement includes a pair of flexible fingers extending over and past each batten to straddle the mast within the mast sleeve. As the sail swifts to either leeward position, one end of the windward finger is bent to form a knee, one side of the bent end acting against the mast to be restrained thereby stabilizing the sail in that condition and also tenching to arch the batten and thus act as a camber inducer. The flexible fingers are preferably flat plastic pieces installed in pockets sewn opposite each other onto either side of the sail over the batten pockets.

Abstract: A sail shaping arrangement is disclosed for horizontal edges of a sail including a web formed along one side in a curved shape corresponding to the desired camber of the sail, the web attached to the sail edge to extend normally thereto. A diagonal batten stretches the web to establish a shaped edge to the sail. A skirt batten may also be used, as well as a tension cord along a straight, chordal side of the web.

Abstract: An arrangement is disclosed which secures the sail to the mast of a sailing craft to achieve an aerodynamic profile about the mast while allowing curvature in the mast for optimum sail profile. The arrangement includes an outer profile sleeve of flexible material extending from a line of securement to the rear of the luff of the sail forwardly around the mast. The profile sleeve receives one or more semi-rigid, flexible profile members comprised of lightweight plastic sections configured to be tightly fit therein, stretching the profile sleeve into a high efficiency wing shape surrounding the mast. The wing shape includes a leading parabolic surface and curved sides smoothly transitioning into the main sail area to create a lift airfoil with the sail angled either to port or starboard.