Boeing shows off hydrogen powered unmanned aircraft

Phantom Eye can fly for four days at 65,000ft.

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Boeing today rolled out a liquid hydrogen-powered unmanned aircraft it says can fly at high altitudes for up to four days.

The Phantom Eye demonstrator is powered by two 2.3-liter, four-cylinder engines that provide 150 horsepower each. It has a 150-foot wingspan, will cruise at approximately 150 knots and can carry up to a 450-pound payload at  65,000 feet.

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The driving idea behind Phantom Eye is  that it could park itself high over a specific location for intelligence gathering, reconnaissance, surveillance and communication.

According to the AVWeb site: "The twin-engine Phantom Eye demonstrator aircraft will have a 150-foot wingspan. Successful testing could make it the precursor of a larger HALE that would carry 2,000 pounds for more than 10 days. A third design, the Phantom Ray, is also expected to evolve from the program and may be the first to fly. The Ray will be a fighter-sized UAV designed as a flying test bed for advanced technologies. Phantom Eye is the evolution of Boeing's earlier piston-powered Condor, an aircraft that set records for altitude and endurance in the late 1980s.  Boeing expects first flight of the Phantom Eye UAV to take place early next year."

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