The prototype of Russia's legendary Su-27 fighter jet, T-10 (Sukhoi's 10th design) first flew in May 1977. After serious redesigns the T-10 evolved into the definitive Su-27 configuration, which entered service with the Soviet Air Forces in 1985. Starting in 2004, the Russian Air Force began a major update of the original Soviet Su-27 fleet. The upgraded variants were designated Su-27SM, which belong to the 4+ generation. See the images of Russia's iconic fighter jet in this photo gallery.
Russia's legendary Su-27 jet fighter marks the 40th anniversary of its first flight
40 years ago the prototype of Russia's Su-27 fourth generation fighter aircraft, Т-10, made its first flight
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Su-27 is a twin-engine supermaneuverable fighter aircraft designed by Sukhoi. Photo: Su-27 fighter jet, 1989
© Roman Denisov, Vladimir Yatsina/TASS The prototype of the Su-27, factory code T-10, was finished by September 1971. Photo: Su-27 fighters preparing to demonstration flight in USA, 1990
© Vladimir Yatsina/TASS
T-10 (Sukhoi's 10th design) first flew on May 20, 1977. Photo: The soldier installes the air-to-air missiles at Su-27, 1993
© Alexander Kosinets/TASS Su-27 fighter jets of the Russkiye Vityazi (Russian Knights) aerobatic team
© Marina Lystseva/TASS After several serious redesigns the T-10 evolved into the definitive Su-27 configuration
© Yuri Smityuk/TASS It entered service with the Soviet Air Forces in 1985
© Yuri Smityuk/TASS Sukhoi Su-27 fighter aircraft at the Army-2016 international military-technical forum
© Sergei Bobylev/Russian Defence Ministry Press Office/TASS In 1991, the production facilities developed export variants of the Su-27: the Su-27SK and Su-27UBK, which were exported to China, Vietnam, Ethiopia and Indonesia. Photo: A pilot on a Su-27 fighter jet, 2013
© Yuri Smityuk/TASS Later Russia started development of advanced variants of the Su-27 including the Su-30, Su-33, Su-34, Su-35, and Su-37
© Sergei Konkov/TASS Since 1998 the export Su-27SK has been produced as the Shenyang J-11 in China under licence
© Marina Lystseva/TASS Starting in 2004, the Russian Air Force began a major update of the original Soviet Su-27 fleet. The upgraded variants were designated Su-27SM, which belong to the 4+ generation
© Marina Lystseva/TASS