Australian, U.S. HIFiRE rocket achieves Mach 7.5

Australian, U.S. HIFiRE rocket achieves Mach 7.5 Canberra, Australia (UPI) May 18, 2016 - Australia and the United States have successfully fired an experimental rocket with a speed of more than seven times the speed of sound. The rocket, which reached an apogee, or highest altitude, of about 172.7 miles, is part of a joint research program called HIFiRE, or Hypersonic International Flight Research Experimentation Program. It is being conducted by Australia's Defense Science ... more

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