China Flies World's First Megawatt-Class Hydrogen Turboprop Engine on a 7.5-Tonne Unmanned Cargo Aircraft
AECC's AEP100 liquid hydrogen turboprop completed a 16-minute maiden flight in Zhuzhou, producing zero carbon emissions and establishing China's lead in hydrogen aviation propulsion.
Overview
A 7.5-tonne unmanned cargo aircraft powered by the AEP100, China’s independently developed megawatt-class liquid hydrogen turboprop engine, completed its maiden flight on April 5 at an airport in Zhuzhou, Hunan province. The 16-minute test flight marks the first time a hydrogen turboprop engine of this power class has flown on any aircraft worldwide, representing a leap from laboratory development to operational demonstration.
The Aero Engine Corporation of China (AECC), which developed the engine at its Hunan Aviation Powerplant Research Institute, stated that the AEP100 operated normally throughout the flight and that the aircraft completed all scheduled maneuvers before returning safely to the airfield.
What We Know
During the maiden flight, the aircraft covered 36 kilometers at a cruising speed of 220 km/h and an altitude of 300 meters, according to Interesting Engineering. The AEP100 generates over one megawatt of shaft power, placing it in a significantly higher power class than the sub-100-kilowatt hydrogen fuel cell systems currently under development in the United States and Europe.
The engine burns liquid hydrogen stored at approximately minus 253 degrees Celsius, fed through cryogenic pipelines with automated vaporization and pressure controls. Its combustion system uses redesigned injectors and flame holders optimized for hydrogen’s rapid burn characteristics, producing only water vapor as exhaust with zero carbon emissions during operation. The turbine components employ high-strength alloys engineered to withstand hydrogen’s intense thermal cycling.
Ground tests completed on March 29 validated the engine across idle, takeoff-equivalent, and cruise-equivalent operating modes before AECC engineers cleared it for the airborne demonstration, according to reporting from the South China Morning Post. A digital control suite provides real-time monitoring of fuel flow, combustion health, and turbine status throughout flight.
AECC experts stated that the successful maiden flight demonstrates China has established a complete technological chain in hydrogen-fueled aviation engines, covering core components through full system integration.
What We Don’t Know
AECC has not disclosed the engine’s exact power output beyond the megawatt-class designation, nor has it released specific fuel consumption figures or efficiency metrics that would allow direct comparison with conventional kerosene turboprops. The precise weight of the cryogenic fuel system and its impact on useful payload remains undisclosed.
The test used an unmanned cargo aircraft, and it is unclear how the cryogenic hydrogen storage and distribution systems would scale for manned passenger operations, where safety certification requirements are substantially more demanding. No timeline has been announced for piloted flight testing.
While the hydrogen combustion itself produces only water vapor, questions remain about the source of the hydrogen fuel. The climate benefit depends entirely on whether the hydrogen is produced from renewable electricity rather than fossil fuels, a distinction noted by observers tracking the announcement.
Analysis
The AEP100 flight places China ahead in the emerging race for hydrogen-powered aviation propulsion. Western competitors including ZeroAvia in the United States and Airbus in Europe have been developing hydrogen aviation technologies, but their demonstrated systems have operated at significantly lower power levels. ZeroAvia’s 600-kilowatt hydrogen-electric engine recently received FAA special conditions for certification, while Airbus’s hydrogen propulsion program targets entry into service in the 2030s.
AECC has identified initial applications in the low-altitude economy sector, including unmanned cargo transport and island logistics, with plans to gradually expand to regional and eventually mainline passenger aircraft as green hydrogen production costs decline. This staged approach mirrors the broader aviation industry’s view that hydrogen propulsion will reach shorter-range routes before challenging kerosene on long-haul flights.
The demonstration arrives as global interest in alternative aviation fuels has intensified amid volatile oil markets. Whether the AEP100 can transition from a single test flight on an unmanned platform to a commercially viable, safety-certified engine for manned operations remains the defining challenge ahead.