Abstract: A propulsion device for providing forward movement of a sailboat in the absence of wind takes the form of a flexible fin that is removably attached to a sailboat rudder. The fin member is connected to a strut configuration that extends over the tiller and the rudder, with the fin itself extending horizontally from the submerged end termination of the rudder. The fin is made of a flexible material that produces a good forward thrust when the tiller is moved back and forth, thus moving the sailboat forward at a sufficient speed.

Abstract: A system is disclosed for stowing a sail of a sail boat. The system may include a furling stick, and ribs extending therefrom, for gathering the sail upon lowering of the sail. The system may further include leech sticks mounted on the sail for defining segments at which the sail folds upon stowing of the sail against the furling stick.

Abstract: A set of rigid sails that have an aerodynamic profile and that may be secured to a boat.

Abstract: A three-dimensional sail apparatus that is made up of a plurality of spacedly disposed foils and a sail cloth for attachment to the foils on opposite sides thereof. Each foil has opposed sail cloth supporting sides that together define a foil shape, A support is disposed between the sides for controlling the relative positioning between the sides of the foil, with each rail adapted to deflect under wind force against its related sail cloth so that the foil can assume opposite respective asymmetric foil shapes.

Abstract: An apparatus for casting sails comprising a roll stand configured to supply a carrier film. The apparatus contains a support mechanism for the carrier film, and further comprises of a drawing mechanism, a first resin dispenser, a first wiper portion, two yarn applicators, a second resin dispenser, a second wiper portion, an element applicator, a calendar, and curing mechanism.

Abstract: A sail that is fully battened by a plurality of essentially thin, spaced apart battens positioned at a steep angle on the sail. The sail is adapted to be furled around the mast. The battens are stiff enough to support a large roach of a square top sail and yet flexible enough to wrap around the mast. The mast is supported on bearings that allow the mast to turn about the mast's long axis with little friction to permit rapid furling and unfurling of the fully battened sail.

Abstract: The invention relates to method and apparatus for compactly stacking batten or sail cars above a boom when a very tall sail is stowed, furled or fully lowered. More specifically, most of the cars are compacted or stacked by diverting cars onto several lower tracks, such that the height of the stacked cars is approximately halved. If more than two lower storage tracks are used, the height reduction of the stacked cars can be greater.

Abstract: A sail that is fully battened by a plurality of essentially thin, spaced apart battens positioned at a steep angle on the sail. The sail is adapted to be furled around the mast. The battens are stiff enough to support a large roach of a square top sail and yet flexible enough to wrap around the mast. The mast is supported on bearings that allow the mast to turn about the mast's long axis with little friction to permit rapid furling and unfurling of the fully battened sail.

Abstract: A so-called “wing” sail for a sailing vessel, having an airfoil section performing substantially in the manner of an ideal airfoil on either tack is described. A two-sided inner sail structure having resiliently deformable battens slidably engaging a track, fixed to the mast of the sailing device and extending rearwardly, the mast being rotatable about its vertical axis in either direction relative to vertical planes along the longitudinal axes of the sailing device and the boom. Translation of the two main surfaces of the wing sail as well as the surfaces at the clew corner while maintaining proper tension in the surfaces, is accomplished by opposed inflatable air bladders. An aerodynamic seal is provided along the trailing edge of the wing sail. A horizontal control bar is attached to the mast to control the pivotal movement of the mast. The outer sail members wrap, around the mast and are fastened to the mast by a zipper.

Abstract: The invention relates to sail battens comprising tubular batten rods (1) which meet each other in a loose manner and in which tubular inner rods (2) of the same length are arranged to span tubular inner rod joining areas and meet each other in a loose manner. The mutual transverse play (5) of said inner rods determines the arch. To this end an internal support line holds together the arched section and the longer fixed rear rod.

Abstract: The invention relates to an arrangement (1) an arrangement for a sail (2) enabling to form to be varied and comprising battens (4—4) extending between the fore-leech (9) and the after-leech (10). According to the invention, the form of the battens (4—4) is so arranged as to vary depending on the wind and the desired form of the sail. This can be done as the sail is divided and built of several with between the segment is located as battens effecting connectable devices which are elastic across the connection device's length extension.