An electrically driven hydrofoil for fastening to a board in order to lift the board out of the water during travel operation, comprises at least one drive module, which as an autonomous unit is fastened to a portion of the hydrofoil that remains submerged in the water during travel operation, an electric battery, and an electrically operated propulsion device supplied with power by the battery. It is thus possible to equip a conventional hydrofoil and a corresponding hydrofoil board with an electric drive, without the need for modifications to the board or to the hydrofoil. The battery can be arranged in the drive module so that there will be no need to provide external electrical connection between the propulsion device and the battery. The drive module may thus form an autonomous unit that may be attached to the hydrofoil as required, but otherwise is separate from the hydrofoil.

The present disclosure provides generally for a hydrofoil system that may allow a surfboard to glide above the water surface. According to the present disclosure, a rider may be able to manipulate a hydrofoil device attached to a surfboard with limited training and athletic ability. The present disclosure provides for a hydrofoil system that may allow riders to use a light leaning motion to adjust the angle of a front wing to create forward thrust to produce a flow for creating lift. In some aspects, the front wing may tilt to reduce downward drag force in a lifting phase while locking into place during a glide to provide a sustained lift of the paddleboard out of the water.

A stabilizing fin or keel utilizing biomimic design features for use on surface planing or submerged watercraft to provide increased dimensional stability, control and efficiency.

Watercraft Fin The present invention relates to a fin for a watercraft with a flexible spine. The fin has a substantially planar member having a first side surface, a leading edge, a second side surface, a trailing edge, with the leading and trailing edges intersecting at a fin tip. At least one flexible spine having an elongate body with a first end spaced apart from a second end. Each flexible spine is molded from a composition of fibres and resin using a continuous molding process. The at least one flexible spine is bonded to be fixed between the first and second side surfaces of the fin. The number, placement and size of the at least one flexible spine provides the fin with a customised dynamic flex pattern and strength.

Watercraft Fin The present invention relates to a fin for a watercraft with a flexible spine. The fin has a substantially planar member having a first side surface, a leading edge, a second side surface, a trailing edge, with the leading and trailing edges intersecting at a fin tip. At least one flexible spine having an elongate body with a first end spaced apart from a second end. Each flexible spine is molded from a composition of fibres and resin using a continuous molding process. The at least one flexible spine is bonded to be fixed between the first and second side surfaces of the fin. The number, placement and size of the at least one flexible spine provides the fin with a customised dynamic flex pattern and strength.

An underwater wing for a water sports apparatus, having an outer shaped body forming the profile of the wing and consisting of a material of a first type with a first hardness, and including at least one mast receiving portion arranged in the underwater wing. The underwater wing additionally includes a supporting structure consisting of at least one material of a second type with a second hardness, and the shaped body is molded onto the supporting structure and completely encloses the supporting structure, the second hardness being greater than the first hardness.

An underwater wing for a water sports apparatus, having an outer shaped body forming the profile of the wing and consisting of a material of a first type with a first hardness, and including at least one mast receiving portion arranged in the underwater wing. The underwater wing additionally includes a supporting structure consisting of at least one material of a second type with a second hardness, and the shaped body is molded onto the supporting structure and completely encloses the supporting structure, the second hardness being greater than the first hardness.

The present disclosure provides generally for a hydrofoil system that may allow a surfboard to glide above the water surface. According to the present disclosure, a rider may be able to manipulate a hydrofoil device attached to a surfboard with limited training and athletic ability. The present disclosure provides for a hydrofoil system that may allow riders to use a light leaning motion to adjust the angle of a front wing to create forward thrust to produce a flow for creating lift. In some aspects, the front wing may tilt to reduce downward drag force in a lifting phase while locking into place during a glide to provide a sustained lift of the paddleboard out of the water.

A hydrofoil fin for attachment to a board for kiteboarding or jet skiing comprises a core portion having a plurality of torsion boxes and outer shell made of a multi-layer fiber composite material and encapsulating the torsion boxes of the core portion. The hydrofoil fin provides a very rigid support of bending and torsional forces acting on the same and on the wings and against the board. This has an advantageous effect on the riding performance of during kite surfing and jet skiing.

A structure, such as a fin or water sports board, including a core having opposed first and second core outer surfaces. The structure further includes first and second fiber sheets, wherein the first fiber sheet extends along the first core outer surface and the second fiber sheet extends along the second core outer surface. A thermoplastic material impregnates the first fiber sheet and the second fiber sheet and bonds the first fiber sheet and the second fiber sheet to the core. The thermoplastic material defines an outer surface of the structure.