The famous mach 3.5+ spy plane, the fastest aircraft ever known to be in service with an air force. Recently put in storage. The large, delta-winged SR-71 gets is performance from the unusual J-58 engines, that act at as ramjets at high altitude and speed. It was related to the the YF-12 fighter and its precessor, the A-12 CIA-operated spy aircraft.
The SR-71 first entered service in 1966 and remains the world's most advanced aircraft. Developed to collect strategic reconnaissance (SR) in realms far beyond the U-2's capability, the Blackbird cruises at speeds in excess of three times the speed of sound at altitudes above 80,000 feet. Its cameras and sensors are able to survey nearly 100,000 square miles of the earth's surface each hour. The aircraft is constructed largely of titanium to withstand heat generated by friction during Mach 3 flight. Areas of the aircraft skin reach temperatures of 1,200 degrees Fahrenheit or higher. Wing corrugations and expansion joints between the skin panels allow the aircraft to expand as much as six inches during high speed flight. New lubricants, fuels, and systems were developed to cope with the temperature generated. The SR-71s shape and the use of radar absorbent materials make the aircraft difficult to detect on radar.

Nation of Orgin: USA
Constructor: Lockheed
Type: Supersonic reconaissance
Crew: 2
Length: 32.74 m / 107 ft 5 in
Height: 5.64 m / 16 ft 6 in
Wing Span: 16.94 m / 55 ft 7 in
Max.Weight: 77111 kg / 140,000 lbs
Engines: Two Pratt & Whitney J58 (JT11D-20A) turbo-ramjets; 34000 lbs. thrust each
Max. Speed: M3.5+ (over 4000 km/h)
Ceiling: over 26000 m / 85,000 ft
Max. Range: 4800 km / 8800 nautrical miles
Armament: none