China tests world's first megawatt-class flying wind turbine — it generated enough energy to power a house for 2 weeks

A massive blimp-like wind turbine just completed its maiden flight 6,560 feet above China's Sichuan Province, tethered to the ground by a cable that delivered electricity straight into the power grid below. The 197-foot-long S2000 generated enough power during its test to run an average American household for more than two weeks, harnessing the stronger, steadier winds that blow at higher altitudes.

The floating turbine represents what could be a game-changing approach to renewable energy, particularly for countries with limited space for traditional wind farms or shallow waters for offshore installations. "One is for off-grid settings like border outposts, where it can serve as a relatively stable conventional energy source," explained Weng Hanke, chief technology officer at Linyi Yunchuan Energy Technology. "The other is to complement traditional ground-based wind power systems, creating a three-dimensional approach to energy supply."

Still, significant hurdles remain. That 1.25-mile tether cable poses potential risks to aircraft, and maintaining a wind turbine that must be brought down to earth for every repair could prove costly and complex.