The Su-27UB (Flanker-C) is a two-seat trainer variant in the Su-27 family. Classified as a "combat trainer," it retains the flight and combat capabilities of the single-seat Su-27S with minimal design changes other than accommodating for a second seat. As a result, the Su-27UB was chosen as the basis for the prototypes leading to the Su-27PU, or Su-30.
Description[]

Developer's reveal of the Su-27UB
The Su-27 is a twin-engine supermanoeuverable fighter aircraft amongst the forefront of current generation military aviation. With phenomenal agility only surpassed by advanced fifth-generation stealth aircraft, a heavy weapons payload, and sophisticated, cutting-edge electronics, the Flanker family is amongst one of the only aircraft lines in the world capable of performing a Pugachev's Cobra, and boasts post-stall manoeuvering abilities. It has seen a number of developments into multirole strike fighters, and programs to further enhance its air-to-air abilities. The Su-27UB is the initial conversion trainer variant for new pilots, and retains full combat capability.
Armament[]
Standard weapons
- GSh-30-1 cannon with 800 rounds
- R-73E (AA-11 Archer) with 80 units
Special weapons
- R-27T (AA-10 Alamo-B) with 12 units
- S-24B with 24 units
- ZB-500PT (Napalm) with 16 units