SR-72: Features of the World's Fastest Aircraft - Future Hypersonic Aircraft

SR-72 also known as 'Son of Blackbird' would be the world's fastest aircraft ever built. this video show the features of the SR-72 the world fastest aircraft. The SR-72 is being developed by The United states company Lockheed Martin. The SR-72 is expected would be able to fly at Mach 6, or 7,400 kilometers (4,600 miles) per hour. The SR-72 is the successor to the legendary US supersonic reconnaissance aircraft SR-71.
This video highlights the features of SR-72 including its range, weapons carrying capabilities, engine, role and production status,
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Really? does it even exist?