A watercraft and associated pedal drive system are provided. The pedal drive system allows for unassisted manual pedaling to provide thrust to the watercraft. The pedal drive system also provides on demand pedal assistance of varying levels via an assist drive train having an electric motor to supplement the manual pedal force input provided by a user at the pedals of pedal drive system.

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.

The present disclosure relates to a boat drive for driving a boat, comprising a drive unit comprising an electric motor and a mounting connected to the drive unit for connecting the boat drive to the boat, wherein the mounting is provided for distancing the drive unit from a hull of the boat, wherein a decoupling arrangement for decoupling of oscillations (S) generated in the drive unit is arranged between the drive unit and the mounting.

An electromotive drive device for a floatable device includes an electric motor operable by means of a separate power supply module with an energy accumulator, an electronic open-loop/closed-loop control unit and a remote control. The electric motor is within a housing connected to a drive propeller, which at least partially is surrounded by a protective device connected to the housing via connecting supports. The housing has an upper housing part and a lower housing part connected to each other by at least one releasable connection. The housing includes an elliptical bow, the end thereof transitioning into an essentially circular diameter with relative dimensions being a sum larger than an end of the housing with a projection opposite the bow. The housing in the lateral area behind the diameter is provided with intake openings for cooling water to flow inward. The cooling water can exit via outlet openings provided in the connecting supports. An operating method for the drive device includes an electronic open-loop/closed-loop control unit with an information processing unit. The drive ensures energetic use of the power supply module by reducing power while considering a travelled distance or travel time of the floatable device.

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 watercraft and associated pedal drive system are provided. The pedal drive system allows for unassisted manual pedaling to provide thrust to the watercraft. The pedal drive system also provides on demand pedal assistance of varying levels via an assist drive train having an electric motor to supplement the manual pedal force input provided by a user at the pedals of pedal drive system.

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 novel rotatable hull that generally includes a hull that is capable of rotating around an attachment point where it is connected to a vessel. In preferred embodiments, an outdoor motor mounted to the rotatable hull will turn to vector thrust and apply a moment to rotate the hull around a nominally vertical axis where the hull connects to the vessel. The invention also is directed to a vessel, which employs a plurality of rotatable hulls. A plurality of rotatable hulls can be arranged into a tripod, square or other stable geometric configuration and connected by a structure to form a vessel that can move in any direction along the plane of the surface of the water with or without changing the yaw axis orientation of the connecting structure. This may be useful in applications such as catching objects that are descending from the sky.

A self-righting unmanned vehicle, comprising: a cavity 1, located at a first side of the hull of the unmanned vehicle; a sealed cavity 2, located at a second side of the hull of the unmanned vehicle and provided, in parallel to the cavity 1, in a head region of the hull; and a first propeller 3, provided in a tail intersection region of a normal waterline A with an inversion waterline B of the unmanned vehicle, and rotating in a reverse direction when the unmanned vehicle is in an overturned state. The self-righting unmanned vehicle improves the self-righting efficiency of the unmanned vehicle.

Provided is a propeller for a submersible, comprising a housing (1) having a cylindrical structure with two open ends, a stator sleeve (2) having a cylindrical structure with one open end, the stator sleeve suspended in an internal cavity of the housing (1), a motor stator (3) fixed inside the stator sleeve (2), a rotor sleeve (4) having a cylindrical structure with one open end and disposed on the stator sleeve (2), a motor rotor (5) fixed to an inner wall of the rotor sleeve (4), and a propeller (6) fixed to an outer wall of the rotor sleeve (4). The propeller (6) of the underwater propeller is directly fixed to the rotor sleeve (4) so that the structure of the motor is compact, and the rotational shaft transmission is not required so that the length of the propeller is shortened and the volume is reduced.