A hydrogen-powered experimental aircraft 'HY4' has made its first official flight, taking off and landing at Stuttgart Airport.

Developed primarily by Germany’s DLR Institute of Engineering Thermodynamics, the twin-fuselage plane is the first four-seater aircraft in the world powered solely by a hydrogen fuel cell.

https://www.theengineer.co.uk/content/news/fuel-cell-aircraft-hy4-makes-maiden-flight

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