Su27S – Flanker B
based on T-10S design, Su-27 production standard version, with original air-to-ground capability. Initially produced for both PVO and VVS, later VVS only, at Komsomolsk-on-Amur. Often referred to as Su-27, without suffix -S.
Su-27P – Flanker B
Su-27 production standard version for PVO, without air-to-ground weapons control system and wiring. Produced for PVO only at Komsomolsk-on-Amur. Often referred to as Su-27, without suffix -P.
Su-27PD – Flanker B
Sole Su-27P prototype fitted with in-flight refueling probe. Later it was used by the ‘Test Pilot’ aerobatic display team, its radar and combat capabilities having been removed.