CentralNotice Lockheed Martin SR-72 From Wikipedia, the free encyclopedia Jump to: navigation , search SR-72 Lockheed Martin SR-72 rendering Role Hypersonic strategic reconnaissance aircraft Manufacturer Lockheed Martin Status Design proposal Primary user United States Air Force (intended) The Lockheed Martin SR-72 is a conceptualized unmanned, hypersonic aircraft intended for intelligence, surveillance and reconnaissance proposed by Lockheed Martin to succeed the retired Lockheed SR-71 Blackbird . [ 1 ] Design and development [ edit ] The SR-72, the proposed successor to the SR-71 Blackbird retired in 1998, [ 2 ] is expected to fill what is considered a coverage gap between surveillance satellites, subsonic manned aircraft, and unmanned aerial vehicles for intelligence, surveillance and reconnaissance (ISR) and strike missions. With the gr...