Abstract: A sailing device suitable for a pleasure boat or the like of narrow width which is small in restoring force against traverse tilt. The sailing device is characterized by comprising a sail portion A composed of a backbone, a pair of left and right spars 3a, 3b extending obliquely backward from the fore end of the backbone 1, and a sail-cloth 8 attached at the fore edge thereof to the pair of left and right spars and at the aft end thereof to the aft end of the backbone 1, and a strut 4 extending downward from the fore end of the backbone 1. The lower end of the strut is directly mounted on the boat hull for rise and fall or indirectly attached to the boat hull by support of a user.

Abstract: A sailing device suitable for a pleasure boat or the like of narrow width which is small in restoring force against traverse tilt. The sailing device is characterized by comprising a sail portion A composed of a backbone, a pair of left and right spars 3a, 3b extending obliquely backward from the fore end of the backbone 1, and a sail-cloth 8 attached at the fore edge thereof to the pair of left and right spars and at the aft end thereof to the aft end of the backbone 1, and a strut 4 extending downward from the fore end of the backbone 1. The lower end of the strut is directly mounted on the boat hull for rise and fall or indirectly attached to the boat hull by support of a user.

Abstract: Two embodiments of hull designs for catamarans in which the sponsons are configured so as to provide a displacement type operation and in which the sponsons are configured so as to improve stability while reducing flow resistance. The sponsons are generally curved along their bottom surfaces and have a width that begins at a knife edge, increases gradually toward midships, then decreases with an increasing width section at the rear end thereof. In one embodiment, the sponsons are asymmetric so as to reduce the generation of waves deflected inwardly toward the main hull. In another embodiment they are symmetric. The main hull is also provided with a step at its rear end so as to avoid wave interference and the sponsons have steps at their rear ends so as to reduce front end lift when travelling at high speeds and reduce flow resistance.

Abstract: A catamaran construction formed from a molded fiberglass reinforced resin and a method for making it wherein the hull is comprised of a main hull and a pair of sponsons each affixed to the respective sides of the main hull. The main hull is formed from upper and lower portions, each of which contains the respective portion of the main hull and the sponsons, all integrally connected to each other.

Abstract: A supporting strut for a hydrofoil type of watercraft that also incorporates a water inlet for a jet propulsion unit. In accordance with the invention, the strut has a generally triangular configuration and a smooth transition from the lower water inlet end to at least the water level so as to reduce turbulence and improve performance.

Abstract: A stabilizing device for a hydrofoil type watercraft embodying a fully submerged hydrofoil. A flywheel is supported for precessive effect and is operatively connected to the steering shaft for effecting movement of the steering shaft and associated hydrofoil for generating a stability force on the hull in response to leaning thereof.

Abstract: A number of embodiments of water powered devices that are adapted to be positioned in a stream of moving water and which carry water wheels for driving a driven device. The driven device may comprise a generator and a number of embodiments are illustrated for holding the generator against rotation and for absorbing its torque loading. In addition, a device is provided for insuring buoyancy of the device so that the water wheels float with their axis above the level of water. In some embodiments, the buoyant device comprises a buoyant float that also provides a hydrodynamic lift and a hydrodynamic force for carrying the device to the center of the stream. In other embodiments, the device comprises a hydrodynamic device that provides both the lift and the transverse force. An arrangement is disclosed which permits stacking of the water wheels for ease of packing and additionally an arrangement is disclosed for permitting replacement of individual blades of the water wheels.

Abstract: A number of embodiments of water powered devices that are adapted to be positioned in a stream of moving water and which carry water wheels for driving a driven device. The driven device may comprise a generator and a number of embodiments are illustrated for holding the generator against rotation and for absorbing its torque loading. In addition, a device is provided for insuring buoyancy of the device so that the water wheels float with their axis above the level of water. In some embodiments, the buoyant device comprises a buoyant float that also provides a hydrodynamic lift and a hydrodynamic force for carrying the device to the center of the stream. In other embodiments, the device comprises a hydrodynamic device that provides both the lift and the transverse force. An arrangement is disclosed which permits stacking of the water wheels for ease of packing and additionally an arrangement is disclosed for permitting replacement of individual blades of the water wheels.

Abstract: A rowing scull with a hull, a cockpit, and a deck fully peripherally interconnecting the cockpit and the hull. A frame extends beneath the cockpit, inside the hull, and is reinforcingly joined to the deck at each side of the cockpit. Outriggers for oarlocks are mounted to the deck. The oarlocks are adjustable as to position and angularity, the stretcher is adjustably mounted, and the rower's seat is uniquely mounted to rails in the cockpit.

Abstract: A boat structure having interconnected front and rear body sections, said body sections being provided at mating end portions thereof with substantially U-shaped abutting peripheral edges which are in abutting engagement with each other when the body sections are assembled, the body sections being further provided at the mating end portions thereof with radially inwardly extending connecting members in the form of partition walls which are connected together at the center portions thereof by a single bolt and nut.