First KF-21 production jet nears completion

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RX4HE Marks First Hydrogen Flight at Yanqing

The RX4HE, a four-seat hydrogen internal combustion engine aircraft, completed its first flight at Beijing Yanqing Badaling Airport on May 15, marking its debut at the site.

The flight campaign builds on earlier milestones, including test flights completed in March 2023 and January 2024.

https://www.chinaevtolnews.com/p/rx4he-marks-first-hydrogen-flight