4 November 2013
Lockheed Martin’s Skunk Works recently released information on the SR-72, an affordable hypersonic intelligence, surveillance and reconnaissance (ISR) and strike platform that could replace the SR-71 Blackbird. The plane, which would reach speeds of Mach 6, could be demonstrated as early as 2018. In the past, such a plane was a virtual nonstarter because of the cost, but Lockheed reportedly has developed a way with Aerojet Rocketdyne to integrate an off-the-shelf turbine with a scramjet to reach the needed speeds. (Image Credit: Lockheed Martin)
More Info > (Aviation Week)