It was a development of the robust and successful Yak-7B fighter, which was based in turn on the tandem-seat advanced trainer known as the Yak-7UTI. The Yakovlev Yak-9 ( Russian: Яковлев Як-9) is a single- engine, single-seat multipurpose fighter aircraft used by the Soviet Union and its allies during World War II and the early Cold War.
