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Lockheed unveils SR-72 hypersonic Mach 6 scramjet spy plane

2013-11-06 20:52:49| Extremetech

Lockheed Martin's Skunk Works has confirmed that it is developing the SR-72 spy plane. The successor to the SR-71 Blackbird, which was capable of Mach 3.5, the SR-72 will be a hypersonic unmanned aircraft capable of Mach 6, or just over 4,500 mph. At hypersonic speeds, the SR-72 will be able to traverse any continent in around an hour -- meaning the US military can strike or surveil any location on Earth in about an hour.

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