QUOTE(WingNut @ Oct 17 2014, 01:11 AM)
salute!
me not familiar with russian classifications. us classification simpler... a/c/e are singular seat aircraft, b/d/f are twin seaters.
yup russian plane classifications quite difficult to understand.. to much variants... like below:
from wiki.
Soviet-era[edit]
Initial T-10 prototype
Left side scheme of a Sukhoi Su-27 Flanker B, first production series
T10 ("Flanker-A"): Initial prototype configuration.
T10S: Improved prototype configuration, more similar to production spec.
P-42: Special version built to beat climb time records. The aircraft had all armament, radar and paint removed, which reduced weight to 14,100 kg. It also had improved engines.
Su-27 Pre-production series built in small numbers with AL-31 engine
Su-27S (Su-27 / "Flanker-B"): Initial production single-seater with improved AL-31F engine. The "T10P"
Su-27P (Su-27 / "Flanker-B"): Standard version but without air-to-ground weapons control system and wiring and assigned to Soviet Air Defence Forces units. Often designated Su-27 without -P.[23]
Su-27UB ("Flanker-C"): Initial production two-seat operational conversion trainer.
Su-27SK: Export Su-27S single-seater.
Su-27UBK: Export Su-27UB two-seater.
Russian fighter Su-27K (later designated Su-33) on the deck of Admiral Kuznetsov
Su-27K (Su-33 / "Flanker-D"): Carrier-based single-seater with folding wings, high-lift devices, and arresting gear, built in small numbers. They followed the "T10K" prototypes and demonstrators.
Su-27M (Su-35/Su-37, Flanker-E/F): Improved demonstrators for an advanced single-seat multi-role Su-27S derivative. These also included a two-seat "Su-35UB" demonstrator.
Su-27PU (Su-30): Two seat version of the Su-27P interceptor, designed to support with tactical data other single-seat Su-27P, MiG-31 and other interceptor aircrafts in PVO service. Later prototypes renamed Su-30 by Russia, and modified into a multi-role fighter mainly for export market, moving away from the original purpose of the aircraft.
Su-32 (Su-27IB): Two-seat dedicated long-range strike variant with side-by-side seating in "platypus" nose. Prototype of Su-32FN and Su-34 'Fullback'.
Post-Soviet era[edit]
Su-27PD: Single-seat demonstrator with improvements such as inflight refuelling probe.
Su-30M / Su-30MK: Next-generation multi-role two-seater. A few Su-30Ms were built for Russian evaluation in the mid-1990s, though little came of the effort. The Su-30MK export variant was embodied as a series of two demonstrators of different levels of capability. Versions include Su-30MKA for Algeria, Su-30MKI for India, Su-30MKK for the People's Republic of China, and Su-30MKM for Malaysia.
Shenyang J-11: Chinese version of Su-27SK.
Su-27SM (Flanker-B Mod. 1): Mid-life upgraded Russian Su-27S, featuring technology evaluated in the Su-27M demonstrators.
Su-27SKM: Single-seat multi-role fighter for export. It is a derivative of the Su-27SK but includes upgrades such as advanced cockpit, more sophisticated self-defense electronic countermeasures (ECM) and an in-flight refuelling system.[24]
Su-27UBM: Comparable upgraded Su-27UB two-seater.
Su-27SM2: 4.5-gen block upgrade for Russian Su-27, featuring some technology of the Su-35BM; it includes Irbis-E radar, and upgraded engines and avionics.
Su-27SM3: The same as the Su-27SM but is built new rather than a mid-life upgrade.[25]
Su-27KUB: Essentially an Su-27K carrier-based twin-seater with a side-by-side cockpit, for use as a naval carrier trainer or multi-role aircraft.
Su-35BM/Su-35S: Also named the "Last Flanker" is latest development from Sukhoi Flanker family. It features newer avionics and new radar.
Su-27UB1M - Ukrainian modernized version of the Su-27UB.
Su-27UP1M - Ukrainian modernized version of the Su-27UP.
Su-27S1M - Ukrainian modernized version of the Su-27S.
Su-27P1M - Ukrainian modernized version of the Su-27P.