A hydrogen-powered unman-ned drone built by the Boeing Co. Defense, Space & Security segment in St. Louis completed its second test flight in late February during which the twin-engine propeller-driven unmanned aerial vehicle (UAV) demonstrated capabilities that will enable it to perform intelligence, surveillance, and reconnaissance (ISR) missions for up to four days without refueling, Boeing officials say. The flight, at NASA's Dryden Flight Research Center at Edwards Air Force Base, Calif., saw Phantom Eye climb higher than 8,000 feet and cruise for 66 minutes at 62 knots before landing. The aircraft exceeded what it achieved last year during its first flight when it flew at 4,080 feet for 28 minutes. The long-range Phantom Eye UAV offers "on-demand, persistent ISR and communications to any region in the world, rapidly responding to natural disasters and national security issues," says Darryl Davis, president of Boeing Phantom Works in St. Louis.
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