Pratt & Whitney Makes Hypersonic Revival As Pentagon Pushes Reuse

Lockheed Martin SR-71
The turbo-ramjet configuration of the J58 engine inspires the reusable, high-speed propulsion technology for Pratt & Whitney’s Metacomet program.
Credit: U.S. Air Force
As reusable hypersonic propulsion rises up the list of U.S. Defense Department priorities, Pratt & Whitney now confirms it is working on a secretive development program called Metacomet aimed at solving the problem of fielding high-speed, reusable propulsion systems at low cost. Already at least two...

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