Variants
Su-2
- Two-seat light bomber, reconnaissance aircraft. Original designation BB-1.
ShB (Russian: ШБ)
- A proposed ground attack version with M-88A engine, modified landing gear which rotated 90° before retracting to the rear into the wings. Bomb load was increased to 600 kg (1,235 lb). Created in 1940, the aircraft did not enter production due to availability of the Ilyushin Il-2.
Su-4
- An upgraded version, originally intended for the Urmin M-90 engine with 1,565 kW (2,100 hp), but later fitted with a Shvetsov M-82 (some Su-2 were also fitted with M-82). Due to a shortage of duralumin, the structural elements of the wings were made of wood with plywood skin. Wing armament was changed from four 7.62 mm ShKAS machine guns to two 12.7 mm Berezin UB machine guns. One prototype was built and tested, but this improved version was not placed into production.
Read more about this topic: Sukhoi Su-2
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