(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 US Air Force has awarded US$60 million to aerospace startup Hermeus to finance flight testing of its hypersonic Quarterhorse aircraft intended for military and commercial applications. Capable of ...

Private aircraft developer Hermeus has scored a $60 million deal with the United States Air Force (USAF), the company has announced. The funds are earmarked specifically for flighting testing the ...