Here’s How Drones Do (and Don’t) Threaten Passenger Aircraft

One warm evening this fall a pair of U.S. Army UH-60M Blackhawk helicopters cruised low over New York City’s Staten Island, providing security for the United Nations General Assembly’s annual meeting in nearby Manhattan. Just after sunset a shoe box–size airborne object collided with one of the choppers, damaging its main rotor blade, window frame and transmission system. Inspection at a nearby airfield revealed evidence of something that had never happened before—a civilian drone had plowed into a crewed craft in U.S. airspace. That sent the Army, the National Transportation Safety Board and other government agencies scrambling to investigate how and why this had happened.

 

ScientificAmerican.com

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