Meet the RQ-4B Global Hawk: a spy drone with a wingspan of 39.9 meters (longer than the wingspan of a Boeing 757). This unmanned aerial vehicle is powered by a Rolls-Royce F137-RR-100 turbofan engine. It has a cruising speed of 357 mph, max range of 14154 miles, and a max altitude of 60k feet.
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The drone can survey as much as 40k square miles each day. The above video shows it in action. Gung Ho Vids has the full story.
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