Today, large commercial jets fly around 580 mph. The Lockheed SR-71 Blackbird introduced in 1966 is the fastest supersonic jet vehicle in the world, reaching speeds of more than 2,200 mph, nearly four times faster than a commercial jet.
The fastest rocket-powered hypersonic vehicle developed in the late 1960s carrying a human has been the North American X-15, reaching a top speed of 4,520 mph, twice that of the SR-71.
Recently, the U.S. Air Force has awarded a contract to engineer Project Mayhem with the goal to reach 4,603 mph. Now, imagine a vehicle that could fly much faster, maybe even above 6,905 mph, which is beyond nine times the speed of sound.