About This File
X-Plane 11 Lockheed Martin SR-72 1.0. The Lockheed Martin SR72 is an American hypersonic UAV concept intended for intelligence, surveillance and reconnaissance. Lockheed Martin privately proposed it to succeed the retired Lockheed SR-71 Blackbird. There were unconfirmed reports about the SR-72 dating back to 2007, when various sources disclosed that Lockheed Martin was developing an airplane able to fly six times the speed of sound or Mach 6 (4,000 mph; 6,400 km/h; 3,500 kn) for the United States Air Force. Documentation for this X-Plane rendition is included in the download. By Billy Bargagliotti.