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SR-72 Hypersonic Plane Likely to Reach Mach 6
As reported by Dustin Gladwell at Sofrep.com/news, Lockheed Martin is developing a new hypersonic plane, the SR-72. The SR-71 Blackbird, retired in 1998, had been known as the fastest airplane, able to achieve Mach 3.3, or 2,193.7 mph, and could also reach the highest altitude for an aircraft, 85,000 feet. The SR-72 will eclipse the speed record by flying at Mach 6. Sheer speed is a tougher nut for adversaries to crack than is stealth...
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