The present invention relates to a controllable pitch propeller capable of changing a blade pitch according to the sailing conditions of a ship and, specifically, to a controllable pitch propeller having an optimal hub-to-tip diameter ratio, the propeller being capable of reducing the size of a hub so as to have a high efficiency that is close to the propulsion efficiency of a fixed pitch propeller (FPP). In order to accomplish the aforementioned objective, the present invention relates a controllable pitch propeller which comprises a hub mounted at the propelling shaft of a ship, and a blade that is mounted at the circumference of the hub and that has a variable pitch, and which is technically characterized by a H/D ratio, of diameter (H) of the propeller and diameter (D) of the hub, of 0.170-0.2.

A self-contained marine propulsion impeller system, whereby, the impeller is driven from an outer perimeter of a cylinder, thereby, creating thrust. The impeller is connected to an inner wall of the cylinder. The cylinder has a primary end located opposite a secondary end. The primary end of the cylinder has a primary sealing member and a primary bearing member. The secondary end of the cylinder has a secondary sealing member and a secondary bearing member. A plurality of magnets are connected to an outer perimeter wall of the cylinder. The plurality of magnets are located between the first bearing member and the second bearing member. The cylinder is surrounded by a housing. At least one coil winding is connected to an inner wall surface of the housing. The rotating cylinder is suspended within the housing by the first bearing member and the secondary bearing member.

A propulsion system for a vehicle includes a supporting structure and a plurality of propellers carried by the supporting structure. Each propeller is associated to an electric motor with a toroid geometry, having an annular rotor rotatable within an annular stator and defining therewithin a central aperture. The blades of the propeller, which are carried by the rotor, extend to the central aperture.

The invention relates to a rim driven thruster, comprising: a stator body; an annular rotor body that is positioned in the stator and that comprises radially inwardly projecting blades; at least one axial bearing adjacent to the rotor, wherein the at least one axial bearing is configured to transfer and/or contain axial tilt and/or axial forces acting on the rotor body; an electromagnetic actuator system that is configured to selectively impart a driving force to the rotor; and an electromagnetic radial bearing between the stator and the rotor. The invention further relates to a ship with one or more of such rim driven thrusters and a method for propelling a ship.

An outboard propulsion system for vessels includes a supporting structure (4) to be anchored to the transom wall (5) of the vessel and a plurality of propellers (3) carried by the supporting structure (4). Each propeller (3) is associated to an electric motor (6) with a toroid geometry, having an annular rotor (R) rotatable within an annular stator (S) and defining therewithin a central aperture (A), with the blades (3A) of the propeller (3) which are carried by the rotor (R) and extend to the central aperture (A).

An underwater motor module for a water sports device is provided, which forms at least one flow channel each having at least one inlet opening and an outlet opening. The underwater motor module has a motor which is in the form of an internal rotor motor and comprises a hollow rotor, which concomitantly forms the flow channel by way of its inner side. On the outer side of the motor directed away from the flow channel is mounted outside the flow channel, and which bears blades. The motor also comprises an external stator arranged in a housing.

A water sports device is provided, and includes at least one propulsion device which has at least one motor. The motor can be controlled by a control unit and is provided for propelling the water sports device. The parts of the propulsion device are arranged on sides of the foil and/or retaining device orif separate connection elements are arranged between these two devicesbetween these two devices, and can be moved with the foil device from a starting and/or resting position into the operating position and back. In order to propel or pull the water sports device, the device has its own propulsion device. This is part of the retaining and/or foil device, which can move relative to the floating body, in that at least one propulsion element in the form of a propeller or impeller accelerating water against the principal direction of movement is moved with the respective device (retaining and/or foil device).

The propulsion unit including a casing having an inner curved surface and an outer curved surface, at least one tire disposed within the casing within a duct defined by the inner curved surface and the outer curved surface, a first propeller and a second propeller having a plurality of blades extending from within the casing toward a center axis of the casing, and one or more motors housed within the casing, the one or motor being configured to operate the at least one tire, the first propeller, and the second propeller independently of one another. There is also provided a vehicle with one or more propulsion units of the present disclosure.