In an aspect the present disclosure is directed to an electric watercraft having a warning light, wherein the electric watercraft includes at least an electric propulsor configured to propel the electric watercraft in a fluid. Electric watercraft further include a plurality of battery packs located beneath a deck of the electric watercraft and configured to poser the at least an electric propulsor. Electric watercraft further include a warning light located on at aft facing surface of the electric watercraft and configured to be viewable from behind the electric watercraft. The electric watercraft further includes at least a controller located on the electric watercraft and in communication with the at least a warning light, wherein the controller is configured to receive at least a warning signal and illuminate the at least a warning light as a function of the at least a warning signal.

In an aspect the present disclosure is directed to an electric watercraft having a warning light, wherein the electric watercraft includes at least an electric propulsor configured to propel the electric watercraft in a fluid. Electric watercraft further include a plurality of battery packs located beneath a deck of the electric watercraft and configured to poser the at least an electric propulsor. Electric watercraft further include a warning light located on at aft facing surface of the electric watercraft and configured to be viewable from behind the electric watercraft. The electric watercraft further includes at least a controller located on the electric watercraft and in communication with the at least a warning light, wherein the controller is configured to receive at least a warning signal and illuminate the at least a warning light as a function of the at least a warning signal.

Systems and methods for controlling the direction of propulsion of an electric vehicle are provided. According to an embodiment, a method can include receiving a first signal from a first user input device; operating an electric motor in a first direction based on the first signal to propel a watercraft in a forward direction; receiving a second signal from a second user input device; and operating the electric motor in a second direction based on the second signal to propel the watercraft in a reverse direction.

Systems and methods for controlling the direction of propulsion of an electric vehicle are provided. According to an embodiment, a method can include receiving a first signal from a first user input device; operating an electric motor in a first direction based on the first signal to propel a watercraft in a forward direction; receiving a second signal from a second user input device; and operating the electric motor in a second direction based on the second signal to propel the watercraft in a reverse direction.

A device for mounting one or more electric motors to a kayak or a small non-powered vessel, whereby a rotatable assembly is mounted on the gunnel of the vessel on either the port or starboard side, or both. The rotatable assembly includes an axle and an adjustable arm rotatably mounted thereon, with a motor on the end of the adjustable arm The rotatable assembly may be manipulated to move the motor(s) into or out of the water and lock in either position. The adjustable arm allows the motor to be adjusted in the pitch, yaw, and roll orientations. The motor(s) are powered by a battery and controlled by a hand-held unit that allows the motors to be independently operated.

A device for mounting one or more electric motors to a kayak or a small non-powered vessel, whereby a rotatable assembly is mounted on the gunnel of the vessel on either the port or starboard side, or both. The rotatable assembly includes an axle and an adjustable arm rotatably mounted thereon, with a motor on the end of the adjustable arm The rotatable assembly may be manipulated to move the motor(s) into or out of the water and lock in either position. The adjustable arm allows the motor to be adjusted in the pitch, yaw, and roll orientations. The motor(s) are powered by a battery and controlled by a hand-held unit that allows the motors to be independently operated.

A marine propulsion unit of a marine vessel includes a casing provided to house the steering shaft and a controller configured or programmed to control driving of a propeller, the casing being rotatable by the steering shaft, a power supply wire to supply power to the stator, and a signal wire to transmit a drive signal to the controller. The power supply wire and the signal wire are located outside and along the casing so as to pass behind the steering shaft from a first side to a second side of the casing, the first and second sides being opposite to each other with respect to a forward-rearward direction in a plan view thereof.

A watercraft (10) including a board (12), a mast (16) extending below the board, (12) the mast (16) carrying a foil (20) and a propeller (30) that is driven by a motor (32), the motor (32) being carried in a tube (18) connected to or extending from the mast (16), wherein a motor controller (34) is also positioned within the tube (18). In this manner, heat generated by the motor controller during use is dissipated into the water through which the watercraft is travelling. The watercraft (10) may also have a receptacle for holding lubricant, the receptacle being located above the motor, wherein the mast has a conduit that provides fluid communication between the receptacle and the lubricant lubricating the motor and/or driveshaft such that lubricant in the receptacle provides a hydrostatic head of pressure to prevent or minimise water ingress around a propeller seal or a driveshaft seal located adjacent a region where the driveshaft exits into the water.

A watercraft (10) including a board (12), a mast (16) extending below the board, (12) the mast (16) carrying a foil (20) and a propeller (30) that is driven by a motor (32), the motor (32) being carried in a tube (18) connected to or extending from the mast (16), wherein a motor controller (34) is also positioned within the tube (18). In this manner, heat generated by the motor controller during use is dissipated into the water through which the watercraft is travelling. The watercraft (10) may also have a receptacle for holding lubricant, the receptacle being located above the motor, wherein the mast has a conduit that provides fluid communication between the receptacle and the lubricant lubricating the motor and/or driveshaft such that lubricant in the receptacle provides a hydrostatic head of pressure to prevent or minimise water ingress around a propeller seal or a driveshaft seal located adjacent a region where the driveshaft exits into the water.

A fluid machine includes: a shaft portion; a shroud having an inside surface with a diameter decreasing from an upstream side toward a downstream side, a flow path being formed between the shroud and the shaft portion and having a flow path cross-sectional area decreasing toward the downstream side; a propeller rotatably provided about an axis between the shaft portion and the shroud and configured to pump a fluid from the upstream side toward the downstream side; and a motor provided to correspond to the propeller and including a rotor having a ring-like shape fixed to an outer circumference portion of the propeller and accommodated in the shroud and a stator having a ring-like shape surrounding the rotor and fixed in the shroud, in which a plurality of the propellers are provided to be spaced apart in the axis direction, the motors are provided in an identical number to the propellers to correspond to each of the propellers, and of a plurality of motors, the rotor of the motor positioned more on the downstream side has a smaller average outside diameter.