Abstract: The invention relates to an air-jet propeller comprising three bodies. The first body or head takes the form of a half-ellipse, the upper part of which is provided with a grille, while the lower part thereof is closed at one section, said first body being equipped with a closure ring. The second body or central part takes the form of a tubular cylinder comprising a helical round honeycomb rotor which is coupled to a spark ignition engine. The third body or rear part takes the form of a truncated cone and is equipped with a series of openings, gates and butterfly valves which balance, stabilise and direct the aircraft, such as to reduce fuel consumption and, consequently, pollution since the aircraft can fly at low speeds (km/h), thereby facilitating landing and take-off with minimum runway lengths and eliminating the risks associated with the high speed required for take-off and landing.

Abstract: Round honeycomb rotor for wind generators and most propellers has bent tubular trapezoids, two or more concentric tubular cylinders and a variable number of round bent tubular trapezoids. Both cylinders and trapezoids form modular trapezoidal tubes, which have large wind contact surfaces. The concentric tubular cylinders of the round panel have bent pieces fitted in between them whose function is to minimise wind exit and multiply wind contact surfaces in wind generators. As for propeller rotors the number of round bent tubular trapezoids gets multiplied as well as its wind contact surfaces, which results in the optimum use of most centrifugal propelling forces thanks to the reduction of wind entrance and the amplification of wind exit.