Skunk Works Hints At SR-72 Demonstrator Progress

Lockheed Martin's SR-72 concept featured a TBCC propulsion system.
Credit: Lockheed Martin
DENVER, Colorado—Four years after revealing plans to develop a Mach 6 strike and reconnaissance aircraft, Lockheed Martin says hypersonic technologies are now sufficiently mature to enable progress towards a flight demonstrator. The company’s secretive Skunk Works unit has been working since at...

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