Fox News on July 2, 2015 reported that the U.S. military is developing a hypersonic jet plane that could soar at up to five times the speed of sound — faster than a bullet, which generally travels at Mach 2, or twice the speed of sound. Excerpts below:

The new hypersonic vehicle, which could take flight by 2023, builds upon research from a 2013 test flight of an experimental hypersonic vehicle, the X-51A Waverider, according to

The $300 million X-51A program began in 2004. The program’s final test flight occurred May 1, 2013, when the unmanned Waverider reached a top speed of Mach 5.1 (more than five times the speed of sound) in just over six minutes, before it was intentionally crashed into the Pacific Ocean.

During the 2013 test flight, the hypersonic jet was released from a B-52H Stratofortress at an altitude of 50,000 feet. After separation, the Waverider accelerated to Mach 4.8 in just 26 seconds, powered by a solid rocket booster. The hypersonic jet separated from the rocket at an altitude of 60,000 feet, eventually reaching Mach 5.1 with its air-breathing supersonic combustion ramjet (or scramjet) engine.

The military’s next-generation hypersonic vehicle will go even further. This time, engineers in the Air Force and the Defense Advanced Research Project Agency (DARPA) will take into account materials that can work well at hypersonic speeds and guidance systems that are smart enough to point the plane in the right direction quickly.

DARPA is working on multiple projects to study the capabilities of hypersonic flight.

The Air Force has also said it is working on hypersonic weapons that could be fired from aircraft traveling at high speeds.

Additionally, in 2014, DARPA announced it would continue with its Experimental Spaceplane (XS-1) program, an initiative to develop a military space plane to launch small satellites into orbit. Boeing, Masten Space Systems and Northrop Grumman were all awarded funding for the project, which DARPA officials said could provide a foundation for future fleets of hypersonic vehicles.


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