The airship-like S1500, the world’s largest flying wind turbine, recently became the first device of its kind to generate one megawatt of power during a test flight.

Wind turbines are already a big part of China’s big bet on renewable green energy, but the Asian country is always looking to lower the cost and increase the efficiency of its installations. That’s how it came up with a versatile inflatable turbine capable of being relocated quickly while generating significant amounts of electricity. The S1500 floating wind power system is about as tall as a 13-storey building and as long as a basketball court. It looks like a giant floating airplane engine and it is capable of operating at heights of up to 1,500 meters, where winds are faster and more stable than at the level of traditional towers (approximately 200 meters).