Hypersonic Rocket-Plane Program Inches Along, Stalls, To Restart

June 3/15: The Air Force is reportedly working on a new hypersonic test vehicle, with the aim of developing the new vehicle by 2023. The Air Force and DARPA are hoping to build on a previous 2013 test, with the X-51A WaveRider intended to be used as a proof of concept.

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The path toward a hypersonic space plane via programs like FALCON HTV and the X-51 has been a slow one, filled with twists and turns one would expect given the technological leap involved. DID covers those ongoing developments...

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