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The present application is directed to a tethered airborne wind power generator system including a plurality of pilot buoyant parafoils, at least one power generator parafoil, a nacelle and its twin-blimps, and a train of windsock propellers. The plurality of pilot buoyant parafoils is inter-connect

The present application is directed to a tethered airborne wind power generator system including a plurality of pilot buoyant parafoils, at least one power generator parafoil, a nacelle and its twin-blimps, and a train of windsock propellers. The plurality of pilot buoyant parafoils is inter-connected via a composite cable. The power generator parafoil with built-in wind turbines can be suspended beneath the pilot buoyant parafoils via the composite cable. The nacelle is suspended beneath the power generator parafoil via a composite cable. A train of windsock propellers can be coupled to a rear end of the nacelle. The system shall also be applicable on ground by the deployment of an array of trains of windsock propellers hung onto a steel cable grid supported by steel towers to form a wind farm for power generation. The trains of windsock propellers rotating by wind drive their respective outboard generators to generate electrical power.

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1. A tethered airborne wind power generator system comprising: (a) a plurality of pilot buoyant parafoils interconnected to form a train of pilot buoyant parafoils flown to altitude;(b) a nacelle suspended in the air from the pilot buoyant parafoils by a suspension cable, the nacelle being provided

1. A tethered airborne wind power generator system comprising: (a) a plurality of pilot buoyant parafoils interconnected to form a train of pilot buoyant parafoils flown to altitude;(b) a nacelle suspended in the air from the pilot buoyant parafoils by a suspension cable, the nacelle being provided therein with a power generator;(c) twin-blimps rotatably coupled to the two opposite sides of the nacelle via two axles respectively, the twin-blimps being provided on their external surfaces with a plurality of vanes to catch wind energy and drive the twin-blimps to rotate, whereby the rotating torque in turn drives the power generator inside the nacelle to generate power; and(d) a plurality of windsock propellers interconnected to each other via a plurality of transmission rods to form a train of windsock propellers, one end of the train of windsock propellers being coupled to a rear end of the nacelle via an additional transmission rod whereas the other end being free to move, the train of windsock propellers being caused to rotate by wind, whereby the rotating torque is transmitted via the additional transmission rod to the power generator inside the nacelle for power generation;(e) wherein the train of pilot buoyant parafoils provides buoyancy to sustain the system in the air. 2. The tethered airborne wind power generator system according to claim 1, further comprising a composite cable made of synthetic fibrous material embedded with strands of copper conductors for transmission of electricity from the nacelle to a ground station, and the composite cable acting as a mooring line for tethering the system to a cable winch mounted on a trolley on the ground. 3. The tethered airborne wind power generator system according to claim 1, further comprising a composite cable made of synthetic fibrous material embedded with strands of copper conductors for transmission of electricity from the nacelle, and the composite cable acting as a mooring line for tethering the system to a cable winch mounted on a platform floating on water. 4. The tethered airborne wind power generator system according to claim 1, further comprising at least one power generator parafoil suspended in the air from the train of pilot buoyant parafoils by the suspension cable, the power generator parafoil being provided with at least one built-in wind turbine for power generation. 5. The tethered airborne wind power generator system according to claim 4, wherein the power generator parafoil comprises a front opening, a plurality of bottom openings, and a plurality of built-in wind turbines positioned above the plurality of bottom opening respectively, whereby wind is drawn into the power generator parafoil through the front opening and discharged through the bottom openings thereby driving the built-in wind turbines to generate power. 6. The tethered airborne wind power generator system according to claim 1, wherein the two axles between the nacelle and the twin-blimps are extendable so as to correct the differential torque developed by the twin-blimps. 7. The tethered airborne wind power generator system according to claim 1, wherein each windsock propeller includes a sleeve with a wide front opening and a narrow rear opening, a plurality of slanting vanes on both the external and internal surfaces of the sleeve, a frame for supporting the sleeve and a central axle mounted on the frame, whereby the slanting vanes catch wind energy and drive the windsock propellers to rotate about the central axles, thus in turn drive the generator inside the nacelle to generate power. 8. The tethered airborne wind power generator system according to claim 1, wherein the train of windsock propellers serves as a wind direction tail to maintain the nacelle and the twin-blimps in line with the wind direction. 9. The tethered airborne wind power generator system according to claim 1, wherein the nacelle is provided with a wireless power transmitter, whereby electricity generated by the power generator inside the nacelle can be transmitted to a ground-based wireless power receiver station. 10. The tethered airborne wind power generator system according to claim 1, wherein the twin-blimps are inflated with air. 11. The tethered airborne wind power generator system according to claim 1, wherein each blimp is equipped with an automatic air pump to maintain the volume of the twin-blimps. 12. The tethered airborne wind power generator system according to claim 4, wherein the pilot buoyant parafoil, the power generator parafoil, the twin-blimps and the windsock propellers are made of nylon fabrics and their frameworks are made of carbon fibrous material. 13. A tethered airborne wind power generator system comprising: (a) a nacelle having a power generator provided therein;(b) two helium-filled blimps rotatably coupled to the two opposite sides of the nacelle via two extendable axles respectively, the helium-filled blimps being provided on their external surfaces with a plurality of vanes to catch wind energy and drive the helium-filled blimps to rotate, whereby the rotating torque in turn drives the power generator inside the nacelle to generate power; and(c) a plurality of windsock propellers interconnected via a plurality of transmission rods to form a train of windsock propellers, one end of the train of windsock propellers being coupled to a rear end of the nacelle via an additional transmission rod whereas the other end being free to move, the train of windsock propellers being caused to rotate by wind, whereby the rotating torque is transmitted via the additional transmission rod to the power generator inside the nacelle for power generation;(d) wherein the helium-filled blimps provide buoyancy to sustain aloft the system in the air. 14. The tethered airborne wind power generator system according to claim 13, wherein each windsock propeller includes a sleeve with a wide front opening and a narrow rear opening, a plurality of slanting vanes provided on both the external and internal surfaces of the sleeve, a frame for supporting the sleeve and a central axle mounted on the frame, whereby the slanting vanes catch wind energy and drive the windsock propellers to rotate about the central axles, thus in turn drive the generator inside the nacelle to generate power. 15. A ground-based airborne wind power generator system comprising: (a) a steel cable grid supported by a plurality of steel towers;(b) a plurality of windsock propellers interconnected to each other via a plurality of transmission rods to form a train of windsock propellers, one end of the train of windsock propellers being coupled to an outboard generator hung onto the steel cable grid via an additional transmission rod whereas the other end of the train of windsock propeller being free to move, the train of windsock propellers being caused to rotate by wind thereby driving the outboard generator to generate electrical power; and(c) an electrical cable grid running along with the steel cable grid for distribution of electricity generated by the outboard generators. 16. The ground-based airborne wind power generator system according to claim 15, comprising an array of the train of windsock propellers to form a wind farm for wind power generation, the power generated from each outboard generator being fed individually via the electrical cable grid to a central processing unit prior to connection to overhead power grid for power transmission. 17. The ground-based airborne wind power generator system according to claim 15, wherein each windsock propeller includes a sleeve with a wide front opening and a narrow rear opening, a plurality of slanting vanes provided on both the external and internal surfaces of the sleeve, a frame for supporting the sleeve and a central axle mounted on the frame, whereby the slanting vanes catch wind energy and drive the windsock propellers to rotate about the central axles, thus in turn drive the generator inside the nacelle to generate power.