Abstract: The present sailboat sail has extremely high aerodynamic efficiency. The sail has a bifurcated forward edge, the forward ends (17A) of each of which is carried by a footing rope (45) in a track of a vertical stay (22); a fairing (44) is arranged to wrap around the leading edge of a mast (3), and the fairing has a pair of trailing edges (44A), each of which has a footing rope also disposed to be connected to said vertical stays (22); the stays (22) can be separated by a spacer (42) to control the aerodynamic disposition of the trailing edges (44A) of the fairing (44) and the leading edges (17A) of the bifurcated portion of the sail; an enlargement member (46) may be disposed between the inside of the leading edge of the fairing and the outside of the leading edge of the mast further to improve the aerodynamic disposition of the fairing and sail.

Abstract: A flex wing apparatus comprising a support, a mast coupled to the support and a sail. Battens are carried by the sail, and couplings join the leading edge of the battens to the mast so that the sail and battens can pivot about the mast. The battens can be resiliently deformed varying magnitudes to induce the desired chamber into the battens and the sail.

Abstract: Luff furling main and head sails are subject to sagging-off to leeward in heavy winds thereby decreasing the aerodynamic efficiency of the sails. The invention diminishes or eliminates this problem by providing a strip of sail cloth which may be interposed between the luff furling apparatus and a rigging member such as a mast or stay, the strip having a sliding connection with both members along their lengths whereby the load on the sail is transferred uniformly along the length of the rigging member and the furling apparatus is prevented from sagging to leeward.

Abstract: A sailboat mast is composed of two portions, a forward portion supported on the hull by standing rigging and having a concave aft side, and an aft portion, which may be of circular cross-section, supported close to and in line with the forward portion at both ends, the top support, however permitting the top of the aft portion of the mast to be bent away from the forward portion in order to affect the shape of the sail. The main sail is carried by the aft portion of the mast in such a way that when working in any kind of a crosswind, it extends away from the mast in a substantially tangential direction, on the lee side.

Abstract: A mast of simplified and standardized constructional design consists of a tubular section and ancillary components such as a masthead or boom support plates which are welded to the tubular section, the masthead being constituted by a casing and head-piece. The casing is provided with an incorporated anchoring member for the standing rigging, and with slots for receiving the axle-pins of sheaves and rollers. The casign head-piece has a central cheek for locking the sheave pins in position.

Abstract: The invention as disclosed provides an improved mainsail and/or mizzensail furling device for use on sailboats and includes a furling drum mounted on the gooseneck connecting the boom to the mast. An upper masthead holding device is movably mounted relative to the mast and includes a pair of pivoted mast engaging flanges. A first pair of substantially longitudinally extending arms are connected to the flanges and maintain a swivel a given distance from the mast. The halyard is connected to the swivel in a convenient fashion, and a second pair of arms are attached in such a way as to lead the halyard from the top of the swivel device at an angle of approximately 45.degree. to the mast, to maintain the flanges substantially parallel to the mast to facilitate raising and lowering the device as well as a snug fit against the mast when the halyard is made taut. The flanges are pivoted to the first pair of arms so as to grip a variety of mast sizes and configurations.

Abstract: The invention as disclosed provides a mainsail and/or mizzensail furling device for use on sailboats and includes a furling drum mounted on the gooseneck connecting the boom to the mast. An upper masthead holding means is movably mounted relative to the mast and includes a pair of mast engaging flanges. A first pair of substantially longitudinally extending arms are connected to the flanges and maintain a swivel a given distance from the mast. The halyard is connected to the swivel in a convenient fashion, and a second pair of arms are attached in such a way as to lead the halyard from the top of the swivel device at an angle of approximately 45.degree. to the mast, to maintain the flanges substantially parallel to the mast to facilitate raising and lowering the device as well as a snug fit against the mast when the halyard is made taut.