An azimuth thruster system includes a pod configured to rotate relative the hull of the ship about an azimuthal axis of the pod, a propeller shaft extending from the pod and being configured to rotate relative to the pod about a central axis of the propeller shaft, an outer shaft disposed at least partially in the pod and configured to be driven by a first primary prime mover, an inner shaft disposed at least partially within the outer shaft and configured to be driven by a second primary prime mover, and a pod gear unit disposed within the pod and coupled to the outer shaft, the inner shaft, and the propeller shaft. The outer and inner shafts are configured to rotate at least one of the pod and the propeller shaft based on directions and magnitudes of the torques generated by the first and second primary prime movers.

In a marine vessel, a propulsion system comprises at least one propeller having a direction of rotation about a drive shaft and a bulbus protrusion extending from the hull associated with each of the at least one propeller, each protrusion extending from the hull of the vessel, each protrusion receiving and rotatably supporting the at least one propeller. Each protrusion extends between leading and trailing ends and has a substantially circular cross section along a length between the leading and trailing ends having and a leading portion extending from the leading end wherein the leading portion is angled away from the centerline of the hull.

A novel universal propeller has a gearwheel arranged on each rotor blade that is directly operatively connected to a reference gearwheel of a timing gear. The timing gear is operatively connected to a hub gear. The hub gear senses and processes an angular velocity ?.sub.n of a rotation of the hub. The reference gearwheel and the gearwheels of the rotor blades of the timing gear are configured that the ratio of an angular velocity ?.sub.r of the reference gearwheel to the angular velocity ?.sub.n of the rotational movement of the hub is as follows: ?.sub.r/?.sub.n=1?(?)*(S.sub.rot/S.sub.r), where S.sub.rot is a size of the gearwheels and S.sub.r is a size of the reference gearwheel. The present invention is particularly suitable for use in a wind power installation, hydropower installation or an engine of a ship or an aircraft.

A novel universal propeller has a gearwheel arranged on each rotor blade that is directly operatively connected to a reference gearwheel of a timing gear. The timing gear is operatively connected to a hub gear. The hub gear senses and processes an angular velocity ?.sub.n of a rotation of the hub. The reference gearwheel and the gearwheels of the rotor blades of the timing gear are configured that the ratio of an angular velocity ?.sub.r of the reference gearwheel to the angular velocity ?.sub.n of the rotational movement of the hub is as follows: ?.sub.r/?.sub.n=1?(?)*(S.sub.rot/S.sub.r), where S.sub.rot is a size of the gearwheels and S.sub.r is a size of the reference gearwheel. The present invention is particularly suitable for use in a wind power installation, hydropower installation or an engine of a ship or an aircraft.

A rotating machine with a fluid rotor comprises a set of blades (4) mounted on arms (2) rotating about a main axis (1) of the rotor, the rotor being held by a support structure (5) in an orientation such that said axis (1) is essentially perpendicular to the direction of the flow of fluid, each blade (4) being mounted pivoting about a respective axis of rotation (3) parallel to the main axis (1), the machine comprising a linkage (13, 7, 14) for generating a relative rotational movement of each blade (4) relative to the arm (2) of same at the axis of rotation (3) thereof, in order to thus vary the tilt of the blade relative to the flow of fluid in an angular range. According to the invention, the machine comprises means for collectively modifying the geometry of the linkages (13, 7, 14) from a movement generated at the main axis of the rotor in order to vary the amplitude of the angular range.

Disclosed is a variable trajectory non-circular drive (propulsion) system developed for use in all systems that have an energy relationship with air, such as aircraft, wind turbines, automobiles, ventilation and circulation systems, and fluid motion and drive systems. The system has a motion axis of a geometric shape that can be adjusted and which is noncircular instead of a circular route to ensure optimum efficiency. The system also has an adjustment mechanism that adjusts the geometric route of the axis of motion.

The invention relates to a device comprising an asymmetrical wing profile (2) and an adjusting device (15), which asymmetrical wing profile (2) has a profile thickness (q) and a profile chord (p) extending between a wing leading edge (n) and a wing trailing edge (e), which asymmetrical wing profile (2) has, in at least one longitudinal portion (L1-Ln), a three-part variable wing profile (21) in which a front and a rear wing segment (211, 213) are joined to a central wing segment (212) in an articulated manner by means of two hinges (214) having axes of rotation (z) and are designed to permit a rotational movement about the associated axis of rotation (z) with respect to the central wing segment (212).