Boeing’s hydrogen-powered Phantom Eye taxis closer to second flight

Boeing’s hydrogen-powered Phantom Eye taxis closer to second flight:

Following the first flight of its Phantom Eye in June of last year, Boeing has performed software and hardware upgrades in preparation for its second flight that will see it climb to higher altitudes. This week, the hydrogen-powered unmanned aircraft system made a significant step towards such a second flight with the completion of taxi testing at Edwards Air Force Base in California...
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