A hydrofoil, suitable for kite surfing and jet skiing, comprises a keel fin having a first end portion for fastening to a board; and a front wing and a rear wing which are arranged one behind the other in the travel direction and are connected to a second end portion of the keel fin; wherein a connecting rod is situated on the second end portion of the keel fin and detachably connects the wings to the keel fin; and wherein a plate is situated on an outer side of the keel fin and on an outer side of at least one of the wings, and via detachable fastening means is braced to the connecting rod so as to detachably fasten at least one of the wings to the keel fin.

A universal hydrofoil comprises a hydrofoil assembly, a universal mount assembly and a plurality of lateral connectors. The hydrofoil assembly has a longitudinal axis and includes a centerfoil having first and second longitudinal ends. A foil assembly is disposed at the centerfoil second end and includes a fuselage, a wing at a fuselage first end and a tail at a fuselage second end. The universal mount assembly comprises a base having first and second mounting surfaces. The second mounting surface defines a mounting interface configured to reversibly mate with the centerfoil first end. Lateral supports having a pair of arms projecting from a central beam are selectively engageable with the base. The lateral connectors are adjustably secured within the lateral channel and configured to engage a structural feature of a craft.

An attitude-adaptive hydrofoil apparatus, including: strut-braced wing assemblies, a horizontal wing assembly, connection plates, and attack angle adjusting plates. The strut-braced wing assemblies each include a bearing, at least one inclined tube, at least one inclined flow-guiding wing, and at least one stop dog. The horizontal wing assembly includes a horizontal tube, at least one horizontal flow-guiding wing, and at least one depth-locating wing. The attack angle adjusting plates each include an angle adjusting end plate having a hole. The strut-braced wing assemblies are symmetrically disposed at two sides of the horizontal wing assembly. The bearing is fixed on a vessel body by welding. The at least one inclined flow-guiding wing is sleeved on the at least one inclined tube, and is limited by the at least one stop dog. The attack angle adjusting plates are disposed at two ends of the horizontal tube, respectively.

A universal hydrofoil comprises a hydrofoil assembly, a universal mount assembly and a plurality of lateral connectors. The hydrofoil assembly has a longitudinal axis and includes a centerfoil having first and second longitudinal ends. A foil assembly is disposed at the centerfoil second end and includes a fuselage, a wing at a fuselage first end and a tail at a fuselage second end. The universal mount assembly comprises a base having first and second mounting surfaces. The second mounting surface defines a mounting interface configured to reversibly mate with the centerfoil first end. Lateral supports having a pair of arms projecting from a central beam are selectively engageable with the base. The lateral connectors are adjustably secured within the lateral channel and configured to engage a structural feature of a craft.

A hydrofoil having an integrated yoke-bridge to preclude expansion of the channel defined by the yoke when the hydrofoil is secured to the cavitation plate. The single piece hydrofoil is secured to the cavitation by lateral screws passing through the hydrofoil and engaging the side of the cavitation plate. Additionally, one or two holes are optionally drilled through the single piece hydrofoil and through the cavitation plate followed by insertion of bolts passing through the hydrofoil and the cavitation plate.

A universal hydrofoil comprises a hydrofoil assembly, a universal mount assembly and a plurality of lateral connectors. The hydrofoil assembly has a longitudinal axis and includes a centerfoil having first and second longitudinal ends. A foil assembly is disposed at the centerfoil second end and includes a fuselage, a wing at a fuselage first end and a tail at a fuselage second end. The universal mount assembly comprises a base having first and second mounting surfaces. The second mounting surface defines a mounting interface configured to reversibly mate with the centerfoil first end. Lateral supports having a pair of arms projecting from a central beam are selectively engageable with the base. The lateral connectors are adjustably secured within the lateral channel and configured to engage a structural feature of a craft.

The rhombohedral hydrofoil (20) for a craft travelling parallel to an axis (46) has a plane of symmetry and comprises front wings (21, 22) that are connected to one another and rear wings (25, 26) that are connected to one another. The end of each front wing that is furthest from the junction of the front wings with one another is connected to one end of a rear wing which is the end furthest from the junction of the rear wings with one another. This assembly of wings has a first orthogonal projection onto a plane referred to as vertical perpendicular to the axis of travel, this projection having the shape of a quadrilateral having an obtuse angle at the junction of the front wings with one another, an obtuse angle at the junction of the rear wings with one another, and two acute angles at the junction of a front wing with a rear wing. This assembly of wings has a second orthogonal projection onto a plane referred to as horizontal orthogonal to the plane of symmetry and having an axis parallel to the axis of travel, this projection having the shape of a quadrilateral having only angles with magnitudes smaller than 180 degrees.

A hydrofoil board having a hydrofoil configured to be automatically controlled to stabilize the board in a level position even when incurring waves. The hydrofoil includes a pair of individually controllable flaps that control the pitch and direction of the hydrofoil board when propelled in motion. A processor uses an inertial measurement unit (IMU) to obtain orientation and acceleration information of the hydrofoil board. A global positioning system (GPS) unit is also used as an additional speed and location sensor. The processor combines IMU data with a user/rider's input, such as selected speed and direction via handheld wireless controller, and individually controls the flap motors to position the flaps, and the propulsion motor to set speed. In one example, the controller is configured to bring the hydrofoil board to a complete and stabile stop.

A flexible coupling mechanism may be used to suspend a structural component, such as a propulsion pod, from a support member, such as a strut of a hydrofoil watercraft. The flexible coupling mechanism may include multiple vibration isolating mounts configured to extend through the support member to suspend the structural component. The vibration isolating mounts may include a plurality of elastomeric bushings configured to prevent direct contact between a component rigidly coupled to the support member and a component rigidly coupled to the structural component. The elastomeric bushings may include a tapered outer profile configured to provide a nonlinear force feedback profile in response to rotation of the support member relative to the structural component.

A hydrofoil board having a hydrofoil configured to be automatically controlled to stabilize the board in a level position even when incurring waves. The hydrofoil includes a pair of individually controllable flaps that control the pitch and direction of the hydrofoil board when propelled in motion. A processor uses an inertial measurement unit (IMU) to obtain orientation and acceleration information of the hydrofoil board. A global positioning system (GPS) unit is also used as an additional speed and location sensor. The processor combines IMU data with a user/rider's input, such as selected speed and direction via handheld wireless controller, and individually controls the flap motors to position the flaps, and the propulsion motor to set speed. In one example, the controller is configured to bring the hydrofoil board to a complete and stabile stop.