Submission + - Tweaked, Air Force to blast second hypersonic jet (networkworld.com)
coondoggie writes: "Air Force researchers said they a prepped for a second test run of its X-51A Waverider hypersonic jet which they ultimately expect to hit speeds upwards of Mach 6. The X-51 test will be the second of flight of the four scramjets built for the Air Force tests by Boeing and Pratt & Whitney Rocketdyne"