A modular, weight-shift controlled watercraft device is disclosed which includes: a modular board removably attachable to a power system. The power system includes a modular power supply system, and a modular propulsion system. The power supply system includes a housing including a battery. The propulsion system includes a modular strut, a modular propulsion pod, and a modular hydrofoil. In one embodiment, the power supply system is removably and mechanically attachable directly to the propulsion system.

A hydrofoil device (3) and to a piece of water sports equipment (2). The hydrofoil device (3) includes at least one foil (6, 7), a support column (4), an electric drive (8), and at least one battery (9). A head end (5) of the support column (4) is configured to be secured to an underside (14) of a hull (10) of the piece of water sports equipment (2). An elongate signal cable duct (20) extends from a rear end (21), arranged at the support column (4), to a front end (22), which includes a receiving device (23). The receiving device (23) is configured to receive control signals. The signal cable duct (20) encloses a signal cable (24), which transmits the control signals from the receiving device (23) to the electric drive (8). The signal cable duct (20) is further configured to grip around a front edge (16) of the hull.

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.

Disclosed is a module configured for removable attachment to a board and attached to an end of a mast, where the mast supports a hydrofoil and a motor to drive the board. The module includes a connector for connecting to a power source, internal control circuitry, and a thermal bridge to thermally connect the control circuitry to the mast. The module comprises a watertight cavity in which the internal control circuitry is contained.

A hydrofoiling watercraft is disclosed that includes a board having a top surface for supporting a user and a bottom surface. Extending from the top surface of the board is a handlebar. Extending from the bottom surface of the board is a hydrofoil including a strut and a hydrofoil wing. A propulsion system is attached to the hydrofoil.

Disclosed is an apparatus, system, and method, by which a gaseous chemical, e.g., hydrogen gas, can be retrieved by, stored within, and transported by, a low-cost autonomous vessel. The vessel is deployed, and operates, within a body of water. A submerged portion of the vessel is subjected to an ambient hydrostatic pressure that is used to compress the stored gases. A spar buoy that floats adjacent to a surface of the body of water regulates and stabilizes a depth of the submerged portion. A single pressure-tolerant chamber within the submerged portion is used to acquire gas from a gas provider and to equilibrate the pressure of the gas so acquired. The pressure-equilibrated and/or pressure-balanced gas is then drawn into a first gas storage tank through a venting of an approximately equal volume of another gas, e.g., air, from a second gas storage tank, resulting in a gas transfer at an approximately constant pressure. The processing and storage of acquired gases at pressures approximately equal to the ambient hydrostatic pressures permits the use of thin-walled tanks, and makes possible a low-cost gas acquisition, storage, and transportation, vessel.

A propulsion device for a hydrofoil craft includes: a hydrofoil configured to be disposed in water; and a water jet thruster that is disposed in front of the hydrofoil and ejects a water flow rearward from an ejection port, wherein an upper surface of a rear portion of the hydrofoil is slanted downward toward rear, and the hydrofoil and the water jet thruster are configured such that at least part of the water flow passes above the rear portion of the hydrofoil.

A watercraft includes a chassis, a drive, a hydrofoil and a drive transfer arm. The drive is operatively connected to a first end of the drive transfer arm. The hydrofoil is pivotably connected to a second end of the drive transfer arm. The watercraft is configured such that operation of the drive causes the hydrofoil to oscillate, to provide thrust. The hydrofoil is pivotably connected to the second end of the drive transfer arm with an adjustable connection mechanism. The adjustable connection mechanism is such that the distance between a leading edge of the hydrofoil and a rotational axis of a pivoting connection point to the drive transfer arm is adjustable.