Sukhoi Su-27

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SU-27
)
"Su-27 Flanker" redirects here. For the PC game, see Su-27 Flanker (video game).

Su-27
Su-27SKM at MAKS-2005 airshow
Role Multirole fighter, air superiority fighter
National origin Soviet Union / Russia
Manufacturer Sukhoi
First flight 20 May 1977
Introduction 22 June 1985
Status In service
Primary users Russian Aerospace Forces
People's Liberation Army Air Force
Uzbekistan Air and Air Defence Forces
See Operators section for others
Produced 1982–2010
Number built 680[1]
Variants Sukhoi Su-30
Sukhoi Su-33
Sukhoi Su-34
Sukhoi Su-35
Sukhoi Su-37
Shenyang J-11

The Sukhoi Su-27 (

air superiority missions, and subsequent variants are able to perform almost all aerial warfare operations. It was designed with the Mikoyan MiG-29
as its complement.

The Su-27 entered service with the Soviet Air Forces in 1985. The primary role was long range air defence against American SAC Rockwell B-1B Lancer and Boeing B-52G and H Stratofortress bombers, protecting the Soviet coast from aircraft carriers and flying long range fighter escort for Soviet heavy bombers such as the Tupolev Tu-95, Tupolev Tu-22M and Tupolev Tu-160.[2]

The Su-27 was developed into a family of aircraft; these include the Su-30, a two-seat, dual-role fighter for all-weather, air-to-air and air-to-surface deep interdiction missions, and the Su-33, a naval fleet defense interceptor for use from aircraft carriers. Further versions include the side-by-side two-seat Su-34 strike/fighter-bomber variant, and the Su-35 improved air superiority and multi-role fighter. A thrust-vectoring version was created, called the Su-37. The Shenyang J-11 is a Chinese license-built version of the Su-27.

Development

Prototype Sukhoi T-10

In 1969, the Soviet Union learned of the

TsAGI in collaboration with the Sukhoi design bureau.[3]

When the specification proved too challenging and costly for a single aircraft in the number needed, the PFI specification was split into two: the LPFI (Lyogkyi PFI, Lightweight PFI) and the TPFI (Tyazholyi PFI, Heavy PFI). The LPFI program resulted in the Mikoyan MiG-29, a relatively short-range tactical fighter, while the TPFI program was assigned to Sukhoi OKB, which eventually produced the Su-27 and its various derivatives.

Soviet Su-27 in flight

The Sukhoi design, which was altered progressively to reflect Soviet awareness of the F-15's specifications, emerged as the T-10 (Sukhoi's 10th design), which first flew on 20 May 1977. The aircraft had a large wing, clipped, with two separate

F-14 Tomcat
, acts both as an additional lifting surface and hides armament from radar.

Air Force

The T-10 was spotted by Western observers and assigned the NATO reporting name 'Flanker-A'. The development of the T-10 was marked by considerable problems, leading to a fatal crash of the second prototype, the T-10-2 on 7 July 1978,[4] due to shortcomings in the fly-by-wire control system.[5] Extensive redesigns followed (T-10-3 through T-10-15) and a revised version of the T-10-7, now designated the T-10S, made its first flight on 20 April 1981. It also crashed due to control problems and was replaced by T-10-12 which became T-10S-2. This one also crashed on 23 December 1981 during a high-speed test, killing the pilot.[6] Eventually the T-10-15 demonstrator, T-10S-3, evolved into the definitive Su-27 configuration.[7]

P-42 at Ramenskoye airfield.

The T-10S-3 was modified and officially designated the P-42, setting a number of

world records for time-to-height,[8] beating those set in 1975 by a similarly modified F-15 called "The Streak Eagle".[9] The P-42 "Streak Flanker" was stripped of all armament, radar and operational equipment. The fin tips, tail-boom and the wingtip launch rails were also removed. The composite radome was replaced by a lighter metal version. The aircraft was stripped of paint, polished and all drag-producing gaps and joints were sealed. The engines were modified to deliver an increase in thrust of 1,000 kg (2,200 lb), resulting in a thrust-to-weight ratio of almost 2:1 (for comparison with standard example see Specifications).[10][11]

Twin-seat combat trainer Su-27UB of the Russian Aerospace Forces

The production Su-27 (sometimes Su-27S, NATO designation 'Flanker-B') began to enter VVS operational service in 1985, although manufacturing difficulties kept it from appearing in strength until 1990.[12] The Su-27 served with both the V-PVO and Frontal Aviation. Operational conversion of units to the type occurred using the Su-27UB (Russian for Uchebno Boevoy - "combat trainer", NATO designation 'Flanker-C') twin-seat trainer, with the pilots seated in tandem.[citation needed]

When the naval Flanker trainer was being conceived the Soviet Air Force was evaluating a replacement for the

side-by-side seated trainer was used as the basis for development of the Su-27IB (Russian for Istrebityel Bombardirovshchik - "fighter bomber") as an Su-24 replacement in 1983. The first production airframe was flown in early 1994 and renamed the Su-34 (NATO reporting name 'Fullback').[13]

Navy

Su-33
on approach

Development of a version for the Soviet Navy designated Su-27K (from Korabyelny - "shipborne", NATO designation 'Flanker-D') commenced not long after the development of the main land-based type. Some of the T-10 demonstrators were modified to test features of navalized variants for carrier operations. These modified demonstrators led to specific prototypes for the Soviet Navy, designated "T-10K". The T-10Ks had

cobra manoeuvre using an Su-27 in 1989), performing test take-offs from a land-based ski-jump carrier deck on the Black Sea coast at Saky in the Ukrainian SSR
. The aircraft was lost in an accident in 1988.

At the time the naval Flanker was being developed the Soviets were building their first generation of aircraft carriers and had no experience with steam catapults and did not want to delay the introduction of the carriers. Thus it was decided to use a take-off method that did not require catapults by building up full thrust against a blast deflector until the aircraft sheared restraints holding it down to the deck. The fighter would then accelerate up the deck onto a ski jump and become airborne.[14]

The production Su-27K featured the required strengthened landing gear with a two-wheel nose gear assembly, folding

leading-edge slats for low-speed carrier approaches, modified Leading Edge Root eXtension (LERX) with canards, a modified ejection seat angle, upgraded fly-by-wire, upgraded hydraulics, an arresting hook and retractable inflight refuelling probe with a pair of deployable floodlights in the nose to illuminate the tanker at night. The Su-27K began carrier trials in November 1989, again with Pugachev at the controls, on board the first Soviet aircraft carrier, called Tbilisi at the time and formal carrier operations commenced in September 1991.[15][16]

Development of the naval trainer, called the Su-27KUB (from Korabyelny Uchebno-Boyevoy - "shipborne trainer-combat"), began in 1989. The aim was to produce an airframe with dual roles for the Navy and Air Force suitable for a range of other missions such as reconnaissance, aerial refuelling, maritime strike, and jamming. This concept then evolved into the Su-27IB (Su-34 "Fullback") for the Soviet Air Force. The naval trainer had a revised forward fuselage to accommodate a side-by-side cockpit seating arrangement with crew access via a ladder in the nose-wheel undercarriage and enlarged canards, stabilisers, fins and rudders. The wings had extra ordnance hard-points and the fold position was also moved further outboard. The inlets were fixed and did not feature foreign object damage suppression hardware. The central fuselage was strengthened to accommodate 45 tonnes (99,000 pounds) maximum gross weight and internal volume was increased by 30%. This first prototype, the T-10V-1, flew in April 1990 conducting aerial refuelling trials and simulated carrier landing approaches on the Tbilisi. The second prototype, the T-10V-2 was built in 1993 and had enlarged internal fuel tanks, enlarged spine, lengthened tail and tandem dual wheel main undercarriage.[13]

Export and post-Soviet development

In 1991, the production facilities at Komsomolsk-on-Amur Aircraft Plant and Irkutsk developed export variants of the Su-27: the Su-27SK single seat fighter and Su-27UBK twin-seat trainer, (the K in both variants is Russian for "Kommercheskiy" - literally "Commercial")[citation needed] which have been exported to China, Vietnam, Ethiopia and Indonesia.[citation needed]

After the collapse of the USSR in 1991, Russia, the successor state, started development of advanced variants of the Su-27 including the Su-30, Su-33, Su-34, Su-35, and Su-37.

Since 1998 the export Su-27SK has been produced as the Shenyang J-11 in China under licence. The first licensed-production plane, assembled in Shenyang from Russian supplied kits, was flight tested on 16 December 1998. These licence-built versions, which numbered 100, were designated J-11A. The next model, the J-11B made extensive use of Chinese developed systems within the Su-27SK airframe.[17]

Starting in 2004, the Russian Air Force began a major update of the original Soviet Su-27 ('Flanker-B') fleet. The upgraded variants were designated Su-27SM (Russian for "Seriyniy Modernizovanniy" - literally "Serial Modernized"). This included upgrades in air-to-air capability with the

Kh-31P/Kh-31A ASM and KAB-500KR/KAB-1500KR smart bombs. The avionics were also upgraded.[citation needed] The Russian Air Force is currently receiving aircraft modernized to the SM3 standard. The aircraft’s efficiency to hit air and ground targets has increased 2 and 3 times than in the basic Su-27 variant. Su-27SM3 has two additional stations under the wing and a much stronger airframe. The aircraft is equipped with new onboard radio-electronic systems and a wider range of applicable air weapons. The aircraft’s cockpit has multifunctional displays.[18]

The Su-30 is a two-seat multi-role version developed from the Su-27UBK and was designed for export and evolved into two main variants. The export variant for China, the SU-30MKK ('Flanker-G') which first flew in 1999. The other variant developed as the export version for India, the Su-30MKI ('Flanker-H') was delivered in 2002 and has at least five other configurations.

The Su-33 is the Russian Navy version of the Soviet Su-27K which was redesignated by the Sukhoi Design Bureau after 1991. Both have the NATO designation 'Flanker-D'.

The Su-34 is the Russian derivative of the Soviet-era Su-27IB, which evolved from the Soviet Navy Su-27KUB operational conversion trainer. It was previously referred to as the Su-32MF.

The newest and most advanced version of the Su-27 is the Su-35S ("Serial"). The Su-35 was previously referred to as the Su-27M, Su-27SM2, and Su-35BM.[19]

The Su-37 is an advanced technology demonstrator derived from Su-35 prototypes, featuring thrust vectoring nozzles made of

Al-Li alloy.[20] Only two examples were built and in 2002 one crashed, effectively ending the program. The Su-37 improvements did however make it into new Flanker variants such as the Su-35S and the Su-30MKI.[21]

Design

Cockpit

The Su-27's basic design is aerodynamically similar to the

tailed delta wing configuration, retaining conventional horizontal tailplanes.[citation needed
]

Pugachev's Cobra
manoeuvre

The Su-27 had the Soviet Union's first operational fly-by-wire control system, based on the Sukhoi

Pugachev’s Cobra
) or dynamic deceleration – briefly sustained level flight at a 120° angle of attack.

Vympel R-27
missiles

The naval version of the 'Flanker', the Su-27K (or Su-33), incorporates canards for additional lift, reducing takeoff distances. These canards have also been incorporated in some Su-30s, the Su-35, and the Su-37.

The Su-27 is equipped with a

N001 Myech coherent Pulse-Doppler radar with track while scan and look-down/shoot-down capability. The fighter also has an OLS-27 infrared search and track (IRST) system in the nose just forward of the cockpit with an 80–100 km (50–62 mi) range.[22]

The Su-27 is armed with a single 30 mm (1.18 in) Gryazev-Shipunov GSh-30-1 cannon in the starboard wingroot, and has up to 10 hardpoints for missiles and other weapons. Its standard missile armament for air-to-air combat is a mixture of R-73 (AA-11 Archer) and R-27 (AA-10 'Alamo') missiles, the latter including extended range and infrared homing models.

Operational history

Soviet Union and Russia

RuAF Su-27SM3

The

Soviet Air Force began receiving Su-27s in June 1985.[12] The first front-line unit to receive the Su-27 was the 831st Fighter Aviation Regiment at Myrhorod Air Base, Ukrainian SSR, in November 1985.[23][24] It officially entered service in August 1990.[12]

On 13 September 1987, a fully armed Soviet Su-27, Red 36, intercepted a Norwegian Lockheed P-3 Orion maritime patrol aircraft flying over the Barents Sea. The Soviet fighter performed different close passes, colliding with the reconnaissance aircraft on the third pass. The Su-27 disengaged and both aircraft landed safely at their bases.[25]

These aircraft were used by the Russian Air Force during the 1992–1993 war in Abkhazia against Georgian forces. One fighter, piloted by Major Vatslav Aleksandrovich Shipko (Вацлав Александрович Шипко) was reported shot down in friendly fire by an S-75M Dvina on 19 March 1993 while intercepting Georgian Su-25s performing close air support. The pilot was killed.[26][27]

In the

2008 South Ossetia War, Russia used Su-27s to gain airspace control over Tskhinvali, the capital city of South Ossetia.[28][29]

On 7 February 2013, two Su-27s briefly entered Japanese airspace off Rishiri Island near Hokkaido, flying south over the Sea of Japan before turning back to the north.[30] Four Mitsubishi F-2 fighters were scrambled to visually confirm the Russian planes,[31] warning them by radio to leave their airspace.[32] A photo taken by a JASDF pilot of one of the two Su-27s was released by the Japan Ministry of Defense.[33] Russia denied the incursion, saying the jets were making routine flights near the disputed Kuril Islands.[30]

A Russian Su-27 and a British Typhoon meet over the Baltic, June 2014

Russia plans to replace the Su-27 and the Mikoyan MiG-29 eventually with the Sukhoi Su-57 fifth-generation multi-role twin-engine fighter.[34]

A squadron of Su-27SM3s was deployed to Syria in November 2015 as part of the

Russian military intervention in the Syrian Civil War.[35][36]

A Russian Su-27 crashed over the Black Sea on 25 March 2020, in mysterious circumstances. The pilot was not found,[37] after a large-scale rescue effort hampered by inclement weather involving four helicopters, 11 civilian and military vessels, and several drones. The plane's last location was some 50 kilometers from the city of Feodosia.[38]

China

PLAAF
J-11BS

China was the first foreign operator of Su-27 and the only country to acquire the fighter before the

fall of the Soviet Union. The deal, known as the '906 Project' in China,[39] marked a leap in Chinese aviation capability in the 1990s.[40] Discussion of the aircraft purchase began in 1988 when the Soviet Union offered China fourth-generation fighters like MiG-29. However, the Chinese negotiator insisted on purchasing the Su-27, the most sophisticated fighter Soviets had at the time. The sales were approved in December 1990, with three fighters delivered to China before the disintegration of the Soviet Union in 1991.[40] Russia completed the contract and allowed China to manufacture the Su-27 domestically, where the aircraft is designated as J-11.[40]

The earliest batch of Su-27s was stationed at the

Nanyuan Airport. Chinese Su-27 pilots described its performance as "outstanding" in all aspects and flight envelopes. The official induction to service with the PLAAF occurred shortly thereafter. China found some of the aircraft delivered were Su-27UBs that had been built in 1989 for the Soviet Union but never delivered. Russia delivered 2 more Su-27UBKs to China as a compensation.[39]

Differences in the payment method delayed the signing of the second, identical contract. For the first batch, 70% of the payment had been made in barter transactions with light industrial goods and food. The

US dollars. In May 1995, Chinese Central Military Commission Vice Chairman Liu Huaqing visited Russia and agreed to the demand, on the condition that the production line of the Su-27 be imported.[clarification needed] The contract was signed the same year. Delivery of the final aircraft from the second batch, which consisted of 16 Su-27SKs and 8 Su-27UBKs, occurred in July 1996. In preparation for the expanding Su-27 fleet, the PLAAF sought to augment its trainer fleet.[42]

On 3 December 1999, a third contract was signed, this time for 28 Su-27UBKs. All 76 of the aircraft featured strengthened

Maximum take-off weight (MTOW) increased to 33,000 kg (73,000 lb). As is common for Russian export fighters, the active jamming device was downgraded; Su-27's L005 ECM pod was replaced with the L203/L204 pod. Furthermore, there were slight avionics differences between the batches. The first batch had N001E radar, while the later aircraft had N001P radar, capable of engaging two targets at the same time. Additionally, ground radar and navigational systems were upgraded. The aircraft are not capable of deploying the R-77 "Adder" missile due to a downgraded fire control system,[42] except for the last batch of 28 Su-27UBKs.[39]

At the 2009

licensed production of Su-27 variants by China. The aircraft was being produced as the Shenyang J-11.[43]

Ethiopia

Ethiopian Su-27s shot down two Eritrean MiG-29s and damaged another one during the

Islamist garrisons and patrolling the airspace. The Su-27 has replaced the aging Mikoyan-Gurevich MiG-21, which was the main air superiority fighter of the EtAF between 1977 and 1999.[48]
Ethiopian government used its Su-27s for bombing targets during the Tigray War. Ethiopian Su-27s were depicted armed with OFAB-250 unguided bombs and over the skies of Mekelle.[citation needed] On 25 August 2022, Ethiopian authorities claimed an An-26 was intercepted and then shot down by an EtAF Su-27, scrambled to investigate the airspace violation incoming from Sudan.[49]

Angola

The Su-27 entered Angolan service in mid-2000 during the Angolan Civil War. It is reported that one Su-27 in the process of landing, was shot down by 9K34 Strela-3 MANPADs fired by UNITA forces on 19 November 2000.[44][50]

Indonesia

Indonesian Air Force Sukhoi Su-27SKM Flanker

Four Indonesian Flanker-type fighters including Su-27s participated for the first time in the biennial Exercise Pitch Black exercise in Australia on 27 July 2012. Arriving at Darwin, Australia, the two Su-27s and two Sukhoi Su-30s were escorted by two Australian F/A-18 Hornets of No. 77 Squadron, Royal Australian Air Force.[51] Exercise Pitch Black 12 was conducted from 27 July through 17 August 2012, and involved 2,200 personnel and up to 94 aircraft from Australia, Indonesia, Singapore, Thailand, New Zealand and the United States.[52]

Ukraine

RIAT
, England
B-52H assigned to the 5th Bomb Wing integrates with two Ukrainian Su-27s during a Bomber Task Force Europe mission, 23 Sept. 2020
Ukrainian Su-27s perform a flypast during the Kyiv Independence Day Parade on 24 August 2021.

The

War in Donbas in 2014.[23] Following the Russian invasion, Ukraine increased its military budget, allowing stored Su-27s to be returned to service.[57][58]

The

831st Tactical Aviation Brigade in October 2015.[59]

In 2014 during the Annexation of Crimea, a Ukrainian Air Force Su-27 was scrambled to intercept Russian fighter jets over Ukraine's airspace over the Black Sea on 3 March.[60] With no aerial opposition and other aircraft available for ground attack duties, Ukrainian Su-27s played only a small role in the war in Donbas until 24 February 2022. Ukrainian Su-27s were recorded performing low fly passes and were reported flying top cover, combat air patrols and eventual escort or intercept of civil aviation traffic over Eastern Ukraine.[61][62] Videos taken of low-flying Su-27s involved in the operation revealed they were armed with R-27 and R-73 air-to-air missiles.[63]

There were two fatal crashes involving Ukrainian Su-27s in 2018.

USAF exercise "Clear Sky 2018" based at Starokostiantyniv Air Base. The second seat was occupied by Lieutenant Colonel Seth Nehring, a pilot of the 144th Fighter Wing of the California Air National Guard. Both pilots died in the crash, that happened about 5:00 p.m. local time in the Khmelnytskyi province of western Ukraine.[64][65] On 15 December, an Su-27 crashed on final approach about 2 km (1 mi) from Ozerne Air Base in Zhytomyr Oblast, after performing a training flight. Major Fomenko Alexander Vasilyevich was killed.[66]

On 29 May 2020, Ukrainian Su-27s took part in the Bomber Task Force in Europe with B-1B bombers for the first time in the Black Sea region.[67] On 4 September 2020, three B-52 bombers from the 5th Bomb Wing, Minot Air Force Base, North Dakota, conducted vital integration training with Ukrainian MiG-29s and Su-27s inside Ukraine’s airspace.[68]

Russo-Ukrainian War

Russian invasion of Ukraine

The Su-27 was used by both sides in the

S-400 system[71] and was recorded by residents on their cell phones and published on Twitter;[72] its pilot, Colonel Oleksandr Oksanchenko, was killed.[73] A third Su-27 was reported lost by Ukrainian officials over Kropyvnytskyi, in central Ukraine; its pilot was killed.[74]

On 7 May 2022, a pair of Ukrainian Su-27s conducted a high-speed, low-level bombing run on Russian-occupied

Bayraktar TB2 drone.[75]

On 7 June 2022, a Ukrainian Su-27, bort number 38 blue, was shot down while flying at low altitude near Orikhiv in Zaporizhzhia Oblast. The aircraft was reportedly destroyed either by an enemy air-to-air missile or due to friendly fire.[76][77]

On 21 August 2022, a Ukrainian Su-27 was reported lost in combat. The pilot died.[78][79]

In September 2022, a Ukrainian Su-27 has been spotted carrying out

better source needed
]

On 13 October 2022, one Ukrainian Su-27 from the 39th Tactical Aviation Brigade [uk] was lost during a combat mission in Poltava Oblast, the pilot died.[81][82]

On 10 March 2023, a Russian Su-27 was damaged in a partisan attack on Uglovoye airfield in Primorsky Krai, Russia. The video of a burning airplane was posted by the Freedom of Russia Legion.[clarification needed][83]

On 14 March 2023, a Russian Su-27 intercepted an American MQ-9 Reaper drone and performed several passes, dumping fuel onto it before colliding with it, causing the drone to crash into the Black Sea.[84]

Variants

Soviet era

Initial T-10 prototype
Left side scheme of a Sukhoi Su-27 Flanker B, first production series
Russian fighter Su-27K (later renamed to Su-33) on the deck of Admiral Kuznetsov
T-10 ("Flanker-A")
[85] Initial prototype configuration.
T-10S ("Flanker-A")
[85] 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 (31,100 lb). It also had improved engines. Similar to the US F-15 Streak Eagle project. Between 1986 and 1988, it established and took several climb records from the Streak Eagle. Several of these records (such as time to climb to 3000 m, 6000 m, 9000 m, and 12000 m) still stands current as of 2019.[86][87]
Su-27 ("Flanker-A")
[85] Pre-production series built in small numbers with AL-31 engine.
Su-27S (Su-27 / "Flanker-B")
[85][88] Initial production single-seater with improved AL-31F engine. The "T-10P".
Su-27P (Su-27 / "Flanker-B")
[85][88] 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.[89]
Su-27UB ("Flanker-C")
[85][88] Initial production two-seat operational conversion trainer.
Su-27K (Su-33 / "Flanker-D")
[85][88] Carrier-based single-seater with folding wings, high-lift devices, and arresting gear, built in small numbers. They followed the "T-10K" prototypes and demonstrators.
Su-27KUB (Su-33UB)
Two-seat training-and-combat version based on the Su-27K and Su-27KU, with a side-by-side seating same as Su-34. One prototype built.
Su-27KM

A projected carrier–based fighter from the base Su-27 fighter that featured

Su-47.[90]

Su-27M (Su-35/Su-37 / "Flanker-E/F")
[91][92] 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 / "Flanker-C")
[85][88] Two-seat version of the Su-27P interceptor, designed to support other single-seat Su-27P, MiG-31 and other interceptor aircraft in PVO service, with tactical data. The model was later renamed to Su-30, 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.


Post-Soviet era

Vietnam People's Air Force Su-27UBK with a drogue parachute
Su-27PD ("Flanker-B")
Single-seat demonstrator with improvements such as inflight refuelling probe.
Su-30M/MK ("Flanker-H")
Next-generation multi-role two–seat fighter. 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
People's Republic of China, and Su-30MKM for Malaysia.[93][94]
Su-27SK ("Flanker-B")
[85][88] Export version of the Su-27S, with a reinforced landing gear allowing for a 33 tonnes maximum take-off weight, and a N001M radar with additional air-to-ground modes.[95] Exported to China in 1992-1996 and developed into the Shenyang J-11.[citation needed] It was also sold to Indonesia in 2003. Indonesian Su-27SKs are equipped with an in-flight refuelling probe.[95]
Su-27KI / Su-30KI
Single-seat demonstrator built in anticipation of an Indonesian order in 1997, based on a Su-27SK. It included an in-flight refuelling probe, and a N001M radar with additional functions allowing for the use of the R-77 missile. That order never came however, due to an embargo caused by the Indonesian occupation of East Timor.[95] Later converted to Su-27SKM in 2002.[96]
Shenyang J-11
Chinese derivative of the Su-27SK.
Su-27UBK ("Flanker-C")
[85][88] Export Su-27UB two-seater.
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.[97]
Su-27UBM
Comparable upgraded Su-27UB two-seater.
Su-27SM ("Flanker-E")
[citation needed] Mid-life upgrade for the Russian Su-27 fleet. It includes new multi-function displays replacing analog flight instruments, improvements to the navigation system, a new fire-control system with slightly improved radar and electro-optical sighting system, and a more advanced mission computer. This allows for use of the radar in synthetic-aperture terrain mapping mode, as well as detection of maritime targets. Contrary to the basic Su-27 variants, the Su-27SM can use guided air-to-ground ordnance, including Kh-29 and Kh-31 missiles, and laser-guided bombs, as well as the R-77 air-to-air missile. The SPO-15 Beryoza is replaced by the Pastel radar warning receiver, and the Sorbtsiya wingtip jamming pods are replaced by the more modern Khibiny. 24 Su-27SMs also received slightly uprated engines.[69]
Su-27SM2 ("Flanker-J")
4+ gen block upgrade for Russian Su-27, featuring some technology of the Su-35BM; it includes Irbis-E radar, and uprated engines and avionics.[citation needed]
Su-27SM3 ("Flanker-J Mod")
[98] Increased maximum takeoff weight (+3 tonnes), AL-31F-M1 engines, fully glass cockpit.[99]
Su-27UB1M
Ukrainian modernized version of the Su-27UB.[citation needed]
Su-27S1M
Ukrainian modernized version of the Su-27S.[citation needed]
Su-27P1M
Ukrainian modernized version of the Su-27P.[citation needed]
Su-35BM/Su-35S ("Flanker-M")
radar cross-section
.

Operators

Operators of the Su-27
  Current
  Former

Current operators

 Angola
People's Air and Air Defence Force of Angola – Seven Su-27s in service as of January 2013.[100] Three were bought from Belarus in 1998. Received a total of eight.[101] One was reportedly shot down on 19 November 2000 by a 9K34 Strela-3 MANPADS during the Angolan Civil War.[102]
 China
People's Liberation Army Air Force (PLAAF) – 78 Su-27 delivered between 1990 and 2010. 32 Su-27UBK are in service as of 2022.[103]
 Eritrea
Eritrean Air Force[104] ordered 2 during the Ethiopian-Eritrean War.[citation needed]
 Ethiopia
Ethiopian Air Force – up to 17 Su-27S, Su-27P, Su-27UB sourced second–hand from Russia in two different batches: 9 starting from 1998 and 8 starting from 2002.[105] Some crashed over the years.[106]
 Indonesia
Indonesian Air Force (TNI - AU or Tentara Nasional Indonesia - Angkatan Udara) – two Su-27SK and three Su-27SKM fighters in service.[95]
 Kazakhstan
Military of Kazakhstan – 20 Su-27/Su-27BM2, 3 Su-27UB/UBM2[citation needed
]
A Su-27 of the Kazakh Air Force taking off
 Russia
Russian Aerospace Forces – 101 Su-27s in service as of 2021.[107][page needed] 359 Su-27 aircraft, including 225 Su-27s, 70 Su-27SMs, 12 Su-27SM3s, and 52 Su-27UBs were in service as of January 2014.[108] A modernization program began in 2004.[109][110][111] Half of the Su-27 fleet had reportedly been modernized in 2012.[112] The Russian Aerospace Forces were receiving aircraft modernized to the SM3 standard as of 2018.[113][114][115][116]
Russian Navy – 53 Su-27s in use as of January 2014[108]
 Ukraine
Ukrainian Air Force – 70 Su-27s in inventory.[117] It had 34 Su-27s in service as of March 2019.[57]
 United States
Two Su-27s were delivered to the U.S. in 1995 from Belarus.[118][119] Two more were bought from Ukraine in 2009 by a private company, Pride Aircraft to be used for aggressor training for U.S. pilots.[citation needed] They have been spotted operating over Area 51 for evaluation and training purposes.[120]
 Uzbekistan
Military of Uzbekistan – 34 Su-27s in use as of January 2013[100]
 Vietnam
Vietnam People's Air Force – 9 Su-27SKs and 3 Su-27UBKs in use as of January 2013[100]

Former operators

 Belarus
Belarusian Air Force inherited 23-28 Su-27s from the former 61st Fighter Aviation Regiment of the Soviet Union.[118] They had 22 in service as of December 2010.[121] Nine Su-27s were sold to Angola in 1998. Belarus had operated 17 Su-27P and 4 Su-27UBM1 aircraft before their retirement in December 2012.[101][122][123]
 Soviet Union
Soviet Air Force and Soviet Air Defence Forces[citation needed
]. Passed to different successor nations in 1991.

Private ownership

According to the U.S.

FAA there are two privately owned Su-27s in the U.S.[124] Two Su-27s from the Ukrainian Air Force were demilitarised and sold to Pride Aircraft of Rockford, Illinois. Pride Aircraft modified some of the aircraft to their own desires by remarking all cockpit controls in English and replacing much of the Russian avionics suite with Garmin, Bendix/King, and Collins avionics. The aircraft were both sold to private owners for approximately $5 million each.[125]

On 30 August 2010, the Financial Times claimed that a Western private training support company ECA Program placed a US$1.5 billion order with Belarusian state arms dealer BelTechExport for 15 unarmed Su-27s (with an option on 18 more) to organize a dissimilar air combat training school in the former NATO airbase in Keflavik, Iceland, with deliveries due by the end of 2012.[126][127] A September 2010 media report by RIA Novosti, the state-owned news agency, questioned the existence of the agreement.[128] No further developments on such a plan have been reported by 2014, while a plan for upgrading and putting the retired Belarusian Air Force Su-27 fleet back to service was reported in February 2014.[129]

Notable accidents

Russian Knights paying tribute to Igor Tkachenko, leader of the group who died during practice a week earlier

Aircraft on display

Su-27PD at the Central Armed Forces Museum in Moscow

Specifications (Su-27SK)

Sukhoi Su-27 3-view drawings

Data from [142] Sukhoi,[143] KnAAPO,[144] Deagel.com,[145] Airforce-Technology.com[146]

General characteristics

  • Crew: 1
  • Length: 21.9 m (71 ft 10 in)
  • Wingspan: 14.7 m (48 ft 3 in)
  • Height: 5.92 m (19 ft 5 in)
  • Wing area: 62 m2 (670 sq ft)
  • Empty weight: 16,380 kg (36,112 lb)
  • Gross weight: 23,430 kg (51,654 lb)
  • Max takeoff weight: 30,450 kg (67,131 lb)
  • Fuel capacity: 9,400 kg (20,723.5 lb) internal[143]
  • Powerplant: 2 ×
    afterburning turbofan
    engines, 75.22 kN (16,910 lbf) thrust each dry, 122.6 kN (27,600 lbf) with afterburner

Performance

  • Maximum speed: 2,500 km/h (1,600 mph, 1,300 kn) / M2.35 at altitude
1,400 km/h (870 mph; 760 kn) / M1.13 at sea level
  • Range: 3,530 km (2,190 mi, 1,910 nmi) At altitude
1,340 km (830 mi; 720 nmi) at sea level
  • Service ceiling: 19,000 m (62,000 ft)
  • g limits: +9
  • Rate of climb: 300 m/s (59,000 ft/min) [147]
  • Wing loading: 377.9 kg/m2 (77.4 lb/sq ft) With 56% fuel
444.61 kg/m2 (91.1 lb/sq ft)

Armament

Avionics

Notable appearances in media

Main article: Aircraft in fiction § Sukhoi Su-27 and derivatives

See also

Related development

Aircraft of comparable role, configuration, and era

Related lists

References

References
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External links
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