A 7.5-tonne unmanned cargo aircraft powered by China's AEP100, a megawatt-class hydrogen-fueled turboprop engine, completed its maiden flight in Zhuzhou, Hunan Province on April 4. This marks the world's first test flight of such an engine. The 16-minute flight covered 36 kilometers at 220 km/h, reached an altitude of 300 meters and returned safely after completing all maneuvers.