An electrically motorized watercraft may include a hull module and a driveline system. The driveline system may include an electric power module and a driveline module. The driveline module may be arranged at an underside of the hull module.

A hydrofoil assembly adapted to be attached to a watercraft includes a mast having a mast head adapted to be removably engage with the watercraft and disposed exterior to the watercraft. The hydrofoil assembly also includes a propulsion assembly coupled to the mast and including a propeller and an electric motor for rotating the propeller. The hydrofoil assembly also includes at least one wing coupled to the mas. Moreover, the hydrofoil assembly includes a battery coupled to the mast head and adapted to be arranged exterior to the watercraft.

The invention involves a boat comprising—a hull (2),—a first hydrofoil (301) fastened to the hull (2) by means of a first fastening arrangement (302), and—a second hydrofoil (601) fastened to the hull (2) by means of a second fastening arrangement (503) which is separate from the first fastening arrangement (302),—wherein the second fastening arrangement comprises a strut (503) arranged to extend at least partly downwards from the hull (2), the second hydrofoil being fixed to the strut,—wherein that the boat comprises a motor pod (502) fixed to the strut (503),—wherein the strut and the motor pod are turnable in relation to the hull for steering the boat,—wherein the motor pod comprises a casing, a power supply assembly housed in the casing, and two propellers arranged to be driven by the power supply assembly,—wherein the propellers (5011, 5012) are counter-rotating.

The invention involves a hydrofoil vessel (1) comprising a hydrofoil assembly (4), and a hull assembly (2) presenting, when the vessel is floating at rest, a vertical symmetry plane (SP), wherein the hydrofoil assembly (4) comprises two struts (401) extending from the hull assembly (2) on opposite transverse sides of the symmetry plane (SP), mainly downwards when the vessel is floating at rest, or mainly partly away from the symmetry plane and partly downwards when the vessel is floating at rest, wherein the hydrofoil assembly (4) comprises two main foil portions (411) each extending from a respective one of the struts (401), at least partly towards the symmetry plane (SP), wherein each strut (401) comprises a strut foil (402) with a non-symmetrical cross-section, and with a pressure side (402P) facing at least partly towards the symmetry plane, and a suction side (402S) facing at least partly away from the symmetry plane (SP).

A marine propulsion system includes wings with a hydrofoil shaped geometry arranged for mounting on opposite side sections of a vessel comprising at least one hull adjacent the transom. Each wing includes a first section extending downwards along the side of the hull and at least partially below the waterline in its operative position. Each wing includes a second section extending towards the central longitudinal axis of the hull in its operative position. The second section each wing is arranged to support at least one propulsor. The first section of each wing is mounted rotatable about a vertical axis.

A linear drive system adapted for repetitive driving using a linear motor. The drive system may be used to power pumping hydrofoils which drive a boat or ship. Linkages are used to maintain the driven portion in linear motion. A coupled dual drive system in which two driven portions are coupled such that their coupled motions travel at the same velocity in opposed directions. The coupled linear drive system which may be used as a mechanical power source for drive systems used in transportation and industry. A boat with dual pumping hydrofoils adapted for propel a boat using the hydrofoils for both lift and propulsion.

Disclosed is a passively cooled waterproof propulsion unit for a watercraft is provided comprising a substantially cylindrical housing including an outer wall having an external surface and an internal surface. The cylindrical housing includes a first end cap attached at a first end of the housing. The first end cap includes an attachment interface configured to be mounted to a strut of a watercraft such that at least a portion of the external surface of the outer wall of the housing is configured to contact a fluid surrounding the housing when the watercraft operates within the fluid. The propulsion unit further includes an electric motor disposed with in the housing and an electronic speed controller. The electronic speed controller is electrically coupled to the electric motor and configured to provide electrical power to the electric motor to operate the electric motor.

A watercraft and a waterproof electronics container are provided. The watercraft includes a flotation portion. A strut is removably affixed to a portion of the watercraft. A first connector portion is mounted to the upper end of the strut. A waterproof electronics container includes a second connector portion is disposed such that the second connector forms at least one electrically conductive pathway with the first connector portion when both are affixed to the watercraft. The waterproof electronics container is removably affixed to the said watercraft. In one aspect, the waterproof electronics container houses a power source capable of powering an electric motor that propels the watercraft.

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 watercraft has a retractable lift-propulsion system including a mast connected to a buoyant body of the watercraft and movable between retracted and deployed positions. A distance between a distal end of the mast and a lower surface of the buoyant body is greater in the deployed position than in the retracted position. A lift-propulsion assembly includes a hydrofoil for providing lift to the watercraft at least in the deployed position of the mast and a propulsion unit for providing thrust to the watercraft in the retracted and deployed positions of the mast. The lift-propulsion assembly is connected to the distal end of the mast such that, in the deployed position of the mast, the lift-propulsion assembly is distanced from the buoyant body of the watercraft and, in the retracted position of the mast, the lift-propulsion assembly is proximate the buoyant body of the watercraft.