Graphic shows details of SR-72 hypersonic aircraft.
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Lockheed Martin hints at SR-72 demonstrator progress

June 9, 2017 - Lockheed Martin report that work on the planned SR-72 – a strike and reconnaissance aircraft capable of topping Mach 6 – can begin thanks to development in hypersonic technologies, including a combined cycle propulsion system that merges a jet and rocket engine.

PUBLISHED:09/06/2017; STORY: Graphic News
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