Flankers in use
Flanker family in service with Russia
I tried to find out which versions of the Su-27 family are really in service with the Russian air force. Seeing through the intense hype and the circus of alphabets describing different models is not easy though...
Let's see...
Su-27 / Su-27S - the basic "vanilla". Entered to service in the mid-80's, Some sources say early 80's though. Around 350 are in service. Avionics are obsolete and the plane lacks multirole capabilities. It can carry 4000kg of bombs and unguided rockets. Built-in GSh-30-1 30mm cannon with 150 rounds.
Su-27UB - 2 seat trainer version of Su-27. Combat capable. Entered service around 1987. Armament similar to the Su-27.
Su-27SM - A mid-life upgrade to the Su-27. First 5 entered service 26th of December 2003. Some sources say all basic Su-27's are subject to this upgrade, but due to financial reasons some 40 - 50 planes (one regiment) are planned at the first phase. Su-27SM is multirole capable all-weather craft. Armament options include 1 x KAB-1500Kr or 4 x KAB-500Kr, Kh-31A&P, Kh-59M, Kh-29T&TE&L and dumb weapons up to 8000 kg. Upgrade includes glass cockpit, far better onboard computing capabilities and targeting pod ability. Lack of money have however caused some compromises in the programme, like leaving the radar unchanged at least on some craft.
Su-27PU / Su-30 - Despite the information in many internet sources, the Su-27PU is not a multirole aircraft. It is derived from Su-27UB as a long range interceptor and engagement leader. Only 5 were built before the program was terminated in the early 90's. Offensive armament as for Su-27. Sukhoi developed the Su-30M multirole variant none of which have entered service in Russia.
Su-27K / Su-33 - Navalized version of Su-27 with structural modifications to fit carrier service. Production began in 1990 and the first patch of 24 craft was also the last. Avionics were upgraded for over water air combat but offensive capabilities remained the same as on Su-27. Upgrade programs are planned, but they will propably be less radical than the Su-27 -> Su-27SM program.
Su-27IB / Su-32FN/MF / Su-34 - The long range strike versions with re-designed forward fuselage. Su-32FN and MF are naval strike variants. The Su-34 is the main version and is designed to replace elder strike, recce and EW planes in service. The Su-27IB is a top priority project for Russian air force along with the Su-27SM modernization. Su-27IB carries a payload of 8000 kg and is compatible with virtually all present and future Russian tactical attack munitions both smart and conventional. However the production has been delayed, again because of financial problems. There are reports of one aircraft being combat-evaluated in Chechnya in 1999. Possible service entry in 2006.
Su-27M / Su-35 - There are reports of 3 aircraft of this "Super Flanker" -type entering service in the 90's. Unlikely to be operational however. Su-35 acted as a technology demonstrator and paved way for Su-27SM upgrade package. Is offered for export.
Main sources were Airforces Monthly and Combat Aircraft magazines plus some net sources. I only trusted websites which referred to "reliable sources" such as Jane's.
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