© GRAPHIC NEWS
© GRAPHIC NEWS
AVIATION
Lockheed Martin hints at SR-72 demonstrator progress
By Mike Tyler
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.