Boeing is at it again! The aviation giant has unveiled a hydrogen-powered unmanned aircraft system. They call it... the Phantom Eye. Muhaha! Okay, it sounds a bit like a bad horror movie, but this really is a jaw dropper. The Pahtom Eye can stay aloft at 65,000 feet for four days emitting nothing other than water, making it the ultimate spycraft.

Boeing can't deny that; The Phantom Eye will be used for 'data and communications collection' Boeing says (sounds like spying to me). The aircraft will be shipped later this summer to NASA's Dryden Flight Research Center for ground and taxi testing. It's first flight will likely take place in early 2011 and should last four to eight hours.

A few interesting specs; the Phantom Eye has  two 2.3 liter, four-cylinder engines that provide 150 hp each. That doesn't sound like much does it? Your average ATV delivers more power. The plane has a 150-foot wingspan and can carry up to a 450-pound payload, Boeing says. It will cruise at 150 knots, or 170 miles per hour.

Via popsci