Black bird(Improved version)

The SR-71 reconnaissance aircraft (English: SR-71, nickname: Blackbird, translation: Blackbird) is a jet long-range, high-altitude, high-speed strategic reconnaissance aircraft of the United States Air Force. The SR-71 reconnaissance aircraft used a large number of advanced technologies at that time, such as titanium structure, turbojet/ramjet variable cycle engine, and still did not lose its advanced nature. It was the first practical jet aircraft to successfully break through the thermal barrier, and no aircraft in the field has ever been shot down by enemy aircraft or anti-aircraft missiles.1]? The development of the SR-71 reconnaissance aircraft began in 1963. It was developed and produced by Lockheed's Skunk Works. It first flew in 1964 and entered service in 1966. A total of 32 aircraft were produced. It was retired in 1990, part of the SR-71 was returned to the army in 1995, and the flight mission was launched in 1997. In 1998, it was permanently retired and part of it was put on display in the museum. Only one SR-71A and one SR-71B used by NASA Dryden Flight Research Center were used for research. Chinese name SR-71 reconnaissance aircraft Foreign name SR-71 Blackbird Development Time February 1963 Service time Country, January 1966 United States (excerpted from Baidu)translate by robot.I changed something in it