Su-39

By design, the Su-39 aircraft is basically identical to the Su-25UB aircraft, designed for combat training flights. But since the Su-39 is a single-seat aircraft, the place of the second crew member was occupied by a soft fuel tank, and additional avionics equipment was placed in the niche located above it. The dimensions of the attack aircraft are quite compact, which makes it maneuverable, difficult to hit, capable of flying at low altitudes, avoiding obstacles and terrain features.

The modernized aircraft was equipped with a Spear-25 radar station in a hanging container, which radically changed its capabilities. In particular, the Su-39 was supposed to conduct a full-fledged air battle, for which the R-73, R-27 and R-77 missiles were included in its arsenal of air-to-air missiles [with maximum launch ranges of 20/40, 65/80 and 80/110 km respectively. Anti-ship Kh-31A with a launch range of up to 110 km was designed to destroy enemy ship groupings. The fight against the enemy radar was carried out by anti-radar Kh-25MPU and Kh-31P. The arsenal of assault weapons was replenished with the high-precision missile system "Whirlwind".