Propulsion rotor assembly for a vehicle; the propulsion rotor assembly being motorized or mechanically driven through a motion source; the propulsion rotor assembly having at least: a driven rotor system to be rotated longitudinally around a rotary axis parallel to a longitudinal direction of the propulsion rotor assembly and a stator hollow structure housing the driven rotor system; the stator hollow structure having a central hub and a hollow duct defining an inside vessel surface; the inside vessel surface extending along the longitudinal rotary axis between two longitudinally opposed transverse distal openings (28; 34); the driven rotor system being functionally mounted in the inside vessel surface, pivotal on the central hub and having a plurality of rotor blades; the rotor blades being motorized / mechanically driven by the motion source, so that the rotor blades are rotated around the rotary axis, when a controlled airflow is required; the rotor blades having an inner shank radially opposed to an outer tip, with the inner shank being mounted on the central hub, while the rotor blades are locally separated from neighbouring blades by an angular air spacing; characterized in that the propulsion rotor assembly includes: - an inside vessel arrangement fixedly secured in the stator hollow structure in at least one of the transverse distal openings (28; 34), the inside vessel arrangement having an enlarged static circumference housing opened towards the outside of the stator hollow structure; - an aerodynamic outer toroid spoiler in the shape of a profiled airfoil type; the aerodynamic outer toroid spoiler being shaped with an outer external surface complementary to the static circumference housing, but smaller than the static circumference housing; the aerodynamic outer toroid spoiler being pivotally linked and radially secured to each outer tip of the rotor blades, so that the outer toroid spoiler is: longitudinally upright with a distal opening (28; 34) of the circumference enlarged housing(s), radially remote from the circumference enlarged housing(s) with the outer external surface facing the corresponding static circumference housing and distanced from the corresponding static circumference housing by a torus air gap; so that an outer laminar flux is admitted simultaneously with / in parallel to an inlet inner stream and guided through the torus air gap between the circumference enlarged housing and the aerodynamic outer toroid spoiler towards the transverse distal opening (34; 28) longitudinally opposed to the circumference enlarged housing, and the inlet main stream and outer laminar flux are converged to merge together in a single outlet control airflow. - an inside vessel arrangement fixedly secured in the stator hollow structure in at least one of the transverse distal openings (28; 34), the inside vessel arrangement having an enlarged static circumference housing opened towards the outside of the stator hollow structure; - an aerodynamic outer toroid spoiler in the shape of a profiled airfoil type; the aerodynamic outer toroid spoiler being shaped with an outer external surface complementary to the static circumference housing, but smaller than the static circumference housing; the aerodynamic outer toroid spoiler being pivotally linked and radially secured to each outer tip of the rotor blades, so that the outer toroid spoiler is: longitudinally upright with a distal opening (28; 34) of the circumference enlarged housing(s), radially remote from the circumference enlarged housing(s) with the outer external surface facing the corresponding static circumference housing and distanced from the corresponding static circumference housing by a torus air gap; so that an outer laminar flux is admitted simultaneously with / in parallel to an inlet inner stream and guided through the torus air gap between the circumference enlarged housing and the aerodynamic outer toroid spoiler towards the transverse distal opening (34; 28) longitudinally opposed to the circumference enlarged housing, and the inlet main stream and outer laminar flux are converged to merge together in a single outlet control airflow.