The present invention is a dual-purpose mounting system for attaching removable hydrofoils along a rideable board. The dual-purpose mounting system reduces repetitive stress exerted on the hull of the rideable board by foil bending and torsion, therefore prolonging the hull life of the rideable board. The dual-purpose mounting system is a solid one-piece constructed foil strongbox having a mounting body that is installed into a surfboard hull. A mounting receptacle is positioned within the mounting body to receive a tuttle style hydrofoil mount through a first hydrofoil aperture at a mounting surface of the mounting body. A pair of second hydrofoil apertures traverses into the mounting surface to further facilitate attachment of a plate style hydrofoil. A plurality of fastener sleeves traverses into the mounting body opposite the mounting receptacle enable attachment of the mounting body to the surfboard hull.

A retractable hydrofoil for marine vessels asymmetrically mounted for-aft on opposing sides of the hull of the marine vessel and a control unit for retracting the hydrofoil from a deployed position to a retracted position.

A marine array having various embodiments of a modular foil system is disclosed. The modular foil system may be configured to generate lift when towed in a marine environment, and thus used to move, position, and/or depress instrument of the array. The modular foil system may include multiple groups of foil sections, each having an angle of attack that is adjustable relative to other groups of foil sections. For example, each group may be supported by a pair of through cables, and an actuator may adjust a tension in one or both of through cables, thereby alerting the angle of attack. The pair of through cables may converge toward one another at connection points adjacent opposing ends of a given group of foil sections of the modular system. The connection points thus establishing a modular framework to couple the given group to other groups of foils of the system.

A hydrofoil for a watercraft has at least one wing and one connecting rod for attaching the at least one wing to a mast. A conically tapered projection is provided on the connecting rod and a conical recess is provided on the wing which engage in one another. The wedge angle of the conical recess is greater than the wedge angle of the conically tapered projection in order to allow angular adjustment between the connecting rod and the wing. By means of a fixing device, the connecting rod can be braced against a portion of the conical recess and/or the wing can be braced against a portion of the conically tapered projection.

The present invention relates generally to underwater wings for providing lift to boats. More particularly, the invention comprises an underwater wing that attaches to the hull or hulls of a pontoon or tri-toon boat. The purpose of the wing is to provide a designated amount of lift to reduce drag and improve performance of the watercraft. This is different from a traditional hydrofoil, which is designed to lift a boat completely out of the water.

A truss-born watercraft supported above at least two, preferably three, planing skis. An outboard motor may be positioned within or above one or more of the skis to provide propulsion. A freight or passenger compartment may be secured and/or supported by the truss members above the water line. As the watercraft hits a cruising speed, skis are lifted above the water level allowing planning of skis and extreme improvement in mobile efficiency.

A watercraft including a board having a top surface and a bottom surface and a hydrofoil attached to a strut. The strut attaches at the bottom surface of the board. The watercraft includes a movable portion coupled to the top surface of the board such that the movable portion is configured to move relative to a fixed portion of the board.

A fully electric hydrofoil boat comprises an elongated hull, a front canard hydrofoil supported by a front support system configured to raise or lower thereof, and a pair of independently-controlled port and starboard rear stowable hydrofoils supported by their respective rear support systems, configured to raise or lower the rear hydrofoils to a selected depth or tilt them out of the water when docking or transporting the boat on a trailer. The hull has a cut-out section in the front portion sized to fit the front canard hydrofoil out of the water if desired. The boat may operate energy-efficiently in a hydrofoil flight mode at high speeds or in a displacement mode at slow speeds when the hydrofoils are in their raised positions.

A watercraft including a board having a top surface and a bottom surface and a hydrofoil attached to a strut. The strut attaches at the bottom surface of the board. The watercraft includes a movable portion coupled to the top surface of the board such that the movable portion is configured to move relative to a fixed portion of the board.

A hydrofoil may include a starboard support structure and a port support structure. Each structure may be hollow and extend longitudinally in a fore-aft direction and being parallel to one another. The hydrofoil may include an anhedral wing having ends at either side of the wing. The ends may be connected to the starboard and port support structures. The hydrofoil may include a starboard electric propulsor mounted to the starboard support structure and a port electric propulsor mounted to the port support structure. The hydrofoil may also optionally include a front wing having ends at either side of the front wing. The ends of the front may be connected to the starboard and port support structures.