Russian culture jet Tupolev Tu-144 by Alexei Tupolev, MiG fighter aircraft series by Artem Mikoyan and Mikhail Gurevich, and Su series by Pavel Sukhoi and his followers. MiG-15 is the world's most produced jet aircraft in history, while MiG-21 is most produced supersonic aircraft. During World War II era Bereznyak-Isayev BI-1 was introduced as the first rocket-powered fighter aircraft, and Ilyushin Il-2 bomber became the most produced military aircraft in history. Polikarpov Po-2 "Kukuruznik" is the world's most produced biplane, and Mil Mi-8 is the most produced helicopter. Famous Russian battle tanks include T-34, the best tank design of World War II,
Sukhoi system, landing braking parachute, catapult ejection seat with telescopic trolley, and a jettisonable nose with a pressurized cockpit. From 1949, Sukhoi fell out of Stalin's favor and in a government resolution, the Sukhoi Design Bureau was scrapped, and Sukhoi was forced to return to work under Andrei Tupolev, this time as Deputy Chief Designer. In 1953, the year of Stalin's death, he was permitted to re-establish his own Sukhoi Design Bureau, set up with new production facilities. After the collapse of the Soviet Union, each of the multitude of bureaus and factories producing Sukhoi components was privatized independently. In the