July 14 2010
Boeing has demonstrated its first hydrogen-powered unmanned aerial vehicle (UAV) at a ceremony in St. Louis, reports the defense firm.
The Phantom Eye demonstrator, unveiled Tuesday, has a 150-foot (46-m) wingspan and can carry a 450-pound (200-kg) payload while flying at an altitude of 65,000 feet (19,800 m) for up to four days, said Boeing officials.
The air vehicle is powered by two two-liter, four-cylinder engines, each providing about 150 hp, enabling a cruise speed of...
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