The Blackbird holds the air speed record of Mach 3 - three times the speed of sound - but the SR-72 will go twice that speed, at up to 4,567 mph. "
Monday, November 25, 2013
London to New York in under an hour! Flight Hypersonic is preparing to board
London to New York in under an hour! Flight Hypersonic is preparing to board (50 years after Thunderbirds came up with the same idea) | Mail Online: "Engineers at Lockheed Martin in the U.S. revealed that they are developing the SR-72, a successor to the SR-71, the iconic Blackbird long-distance spy plane.
The Blackbird holds the air speed record of Mach 3 - three times the speed of sound - but the SR-72 will go twice that speed, at up to 4,567 mph. "
The Blackbird holds the air speed record of Mach 3 - three times the speed of sound - but the SR-72 will go twice that speed, at up to 4,567 mph. "
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