Look up in the sky, it's a bird, it's a plane, it's ... a 20,000 cubic-meter power-generating airship, floating 6,560 ft (2,000 meters) above the ground. Introducing the S2000 stratospheric airborne ...

China has completed a test flight of what it says is the world’s first megawatt-class high-altitude wind power system designed for urban deployment. The enormous S2000 Stratosphere Airborne Wind ...