Yakovlev Yak-9

The Yakovlev Yak-9 (Russian: Яковлев Як-9; NATO reporting name: Frank) 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. 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 Yak-9 started arriving in Soviet fighter regiments in late 1942 and played a major role in retaking air superiority from the Luftwaffe's new Focke-Wulf Fw 190 and Messerschmitt Bf 109 fighters during the Battle of Kursk in summer 1943.

The Yak-9 had a cut down rear fuselage with an unobscured canopy. Its lighter metal structure allowed for an increased fuel load and armament over previous models built from wood. The Yak-9 was manoeuvrable at high speeds when flying at low and medium altitudes and was also easy to control, qualities that allowed it to be one of the most produced Soviet fighters of World War II. It was produced in different variants including the Yak-9T with the 37 mm (1.5 in) cannon and the "large-calibre" Yak-9K with a 45 mm (1.77 in) cannon firing through the propeller hub, which were used for antitank duty and as potent aircraft destroyers, the fighter-bomber Yak-9B with an internal bomb bay behind the cockpit for up to 400 kg (880 lb) worth of bombs, the long-range Yak-9D and the Yak-9DD with additional wing fuel tanks to escort bombers over Eastern Europe, and the Yak-9U with a more powerful engine and improved aerodynamics. The Yak-9 remained in production from 1942 to 1948, with 16,769 built (14,579 during the war).