(Image: Concept image of Lockheed Martin's planned SR-72 hypersonic strike aircraft to serve as a replacement for the SR-71 Blackbird.) It is not yet clear what aircraft DARPA has in mind for the new ...
The new Mayhem demonstrator vehicle for a hypersonic, air-breathing propulsion system traces back to budget planning documents that describe a proposal to develop “multi-cycle engines,” the U.S. Air ...
The SR-71 Blackbird was retired from U.S. Air Force service almost two decades ago, the perennial question has been: Will it ever be succeeded by a new-generation, higher-speed aircraft and, if so, ...
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