Building Airplanes Powered by "Water"

Key Points:

• On April 4, 2026, a 7.5-tonne unmanned cargo aircraft powered by China's hydrogen-fueled AEP100 turboprop engine completed a 16-minute test flight, marking the world's first test of a megawatt-class hydrogen turboprop engine.
• The AEP100 engine uses direct combustion of liquid hydrogen in a turbine cycle, differing from Western approaches like Airbus's hydrogen fuel cells, offering higher power density and better scalability for larger aircraft.
• The flight demonstrated stable engine performance but was brief, leaving questions about durability, maintenance, and fuel efficiency unanswered; thermal management of liquid hydrogen fuel remains a critical engineering challenge.
• China’s phased roadmap targets key technology validation by 2028, regional aircraft applications by 2035, and widespread commercial use by 2050, driven by goals of energy security and reducing fossil fuel dependence amid global oil market pressures.
• Initial deployment of hydrogen aviation engines will focus on low-altitude unmanned cargo and regional logistics routes with controlled infrastructure, as passenger service certification and airport hydrogen infrastructure are still years away.