Note: This plane is not available in-game. This article is just for scientific purposes. The Tupolev Tu-144 (NATO reporting name "Charger") is a retired jet airliner, which was the world's first commercial supersonic transport aircraft (SST). It is one of only two SSTs to enter commercial service, the other being the Anglo-French Concorde. The design, publicly unveiled in January 1962, and was constructed in the Soviet Union under the direction of the Tupolev design bureau, headed by Alexei Tupolev. Throughout its 55-flight operational history, the Tu-144 flew at an average service altitude of 16,000 metres (52,000 ft) and cruised at a speed of around 2,000 kilometres per hour (1,200 mph). The prototype first flew on 31 December 1968 near Moscow, two months before the first flight of Concorde. The Tu-144 first went supersonic on 5 June 1969, and on 26 May 1970 became the first commercial transport to exceed Mach 2. A Tu-144 crashed in 1973 at the Paris Air Show, delaying its further development. The aircraft was introduced into passenger service on 1 November 1977, almost two years after Concorde, because of budget restrictions. In May 1978, another Tu-144 (an improved version, named Tu-144D) crashed in a test flight while being delivered, and the passenger fleet was permanently grounded after only 55 scheduled flights. The aircraft remained in use as a cargo aircraft until 1983, by which point a total of 102 commercial flights had been completed. The Tu-144 was later used by the Soviet space program to train pilots of the Buran spacecraft, and by NASA for supersonic research.