Hyper X mounted on Pegasus booster rocket in 20 Inch Mach 6 Wind Tunnel.
NASA / Fred Jones
Hyper X mounted on Pegasus booster rocket in 20 Inch Mach 6 Wind Tunnel. The Hyper X is an unmanned hypersonic research aircraft launched atop an air launched Pegasus rocket and capable of reaching speeds of Mach 10.Credit: NASA Fred Jones