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An airworthy replica of Yak-9U (Yak-9UM) at Reno Role Fighter Manufacturer OKB Designer First flight Summer 1942 Introduction October 1942 Primary user Produced 1942–1948 Number built 16,769 Developed from The Yakovlev Yak-9 was a single-engine used by the in and after. Fundamentally a lighter development of the with the same armament, it arrived at the front at the end of 1942.

The Yak-9 had a lowered rear fuselage decking and all-around vision canopy. Its lighter airframe gave the new fighter a flexibility that previous models had lacked. The pilots who flew it regarded its performance as comparable to or better than that of the G and A-3/A-4. The Yak-9 was the most mass-produced Soviet fighter of all time. It remained in production from 1942 to 1948, with 16,769 built (14,579 during the war). The Yak-9 was the first Soviet aircraft to shoot down a jet.

Following World War II it was used by the during the. Shevelev matematika dlya doshkoljnikov 4.