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. The rotation of the fluid at a minimum angular velocity creates a virtual barrier, and generates a thrust.
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