Abstract: A power unit including an enclosed housing, a shaft passing through the central section of the enclosed, a motor located outside the housing and mounted to the first end of the shaft, a turbine located inside the housing and mounted into the shaft, the turbine includes a hub, a top end, a bottom end, and blades, sealing fins located at the bottom end of the turbine; and a pump located inside the housing and mounted on the turbine. The pump includes fins that are inserted in grooves located on the hub of the turbine. The fins of the pump are joined to the blades of the turbine creating that the pump, turbine, and shaft move as unitary unit. The fins of the pump maintained by two spaced crowns by insertion form cells that guide a flow of fluid. A space free of fluid with a defined volume occupies the bottom end of the pump. In a non-working position, the space free of fluid has a cylindrical shape. In a working position, because of rotation of the fluid, the space free of fluid has a paraboloid shape.

Abstract: The invention relates to an ecological thrusting device enabling optimum thrust independent from the outside environment. It consists of a special Francis turbine (1) from which the fluid is axially ejected at the outlet of the vane (1?), at a relative speed W2t, and is collected in a defined free space of a straight radial pump (2). Under the action of the centrifugal force, the limit of the current lines forms a fixed virtual barrier Yt, thus preventing the centrifuged fluid from reaching the bottom of the pump in the free space area MNBCPQ, thereby eliminating the antagonistic force exerted on said zone. As a result, the thrusting force exerted on the turbine by the fluid remains intact. As the fluid leaves the pump, it is axially reinjected at a relative speed W2p into a tank (4) for resupplying the turbine. There is therefore an energy exchange between the pumps and the turbine that form a closed circuit, the entire system being driven by a motor (10).