Sukhoi Su-27

Sukhoi Su-27
Name	Sukhoi Su-27
Caption	Su-27 in flight
Type	Air superiority fighter
Manufacturer	Sukhoi
First flight	20 May 1977
Introduced	1985
Status	Active
Primary user	Soviet Air Forces

Sukhoi Su-27 The Sukhoi Su-27 is a twin-engine, supermaneuverable air superiority fighter developed by the Sukhoi Design Bureau in the Soviet Union during the 1970s and introduced in the 1980s. It was designed to counter contemporary Western fighters such as the McDonnell Douglas F-15 Eagle and the Grumman F-14 Tomcat and to provide long-range escort for strategic assets like the Tupolev Tu-95 and the Myasishchev M-4. The Su-27 has spawned numerous variants and served with air arms including the Soviet Air Forces, Russian Air Force, People's Liberation Army Air Force, and several other national air forces.

Development

Development began under direction from the Soviet Ministry of Aviation Industry and the Moscow aircraft industry planning bodies, responding to requirements set after NATO deployments in the 1960s and 1970s involving the Royal Air Force, United States Air Force, and United States Navy. Sukhoi competed with design bureaus such as Mikoyan-Gurevich, Yakovlev, and Tupolev; chief designers and engineers coordinated with institutions like the Central Aerohydrodynamic Institute (TsAGI) and the Moscow Aviation Institute. The preliminary design phase overlapped with projects such as the MiG-29 and the Su-24 modernization programs, while procurement planners considered integration with systems produced by enterprises like NPO Almaz and NIIP. Flight testing involved facilities in Zhukovsky and test pilots connected to the Soviet Air Force Test Pilot School and later production took place at plants in Komsomolsk-on-Amur and Novosibirsk.

Design

The Su-27 airframe incorporated features influenced by research from TsAGI, aerodynamic work related to the Lavochkin lineage, and contemporary engines developed by design bureaus such as Lyulka and Saturn. Twin Saturn AL-31F turbofan units gave the Su-27 high thrust-to-weight ratios similar to Western powerplants like the Pratt & Whitney F100. Avionics suites integrated radar systems from NIIP and electronic warfare subsystems produced by Tikhomirov NIIP affiliates, enabling employment of weapons from Vympel and Vympel NPO missile families. Structural design used materials manufactured by enterprises including TGLT and TsNIIKompozit, yielding a large wing area and distinctive twin-tail configuration influenced by studies at TsAGI and operational philosophies from Soviet Air Defence Forces. Cockpit ergonomics and displays were developed with input from the Gromov Flight Research Institute and cockpit suppliers linked to Zvezda.

Operational history

Operational introduction occurred during the late Cold War with deployments under the Soviet Air Forces in theaters that included the Transbaikal Military District, Far East Military District, and European sectors near Kaliningrad Oblast and Pskov Oblast. The type participated in air policing and intercept missions alongside units from the Soviet Naval Aviation and later saw action under the Russian Air Force during conflicts in the Second Chechen War and operations over Syria involving the Russian Aerospace Forces. Exported aircraft served in engagements or tensions in regions involving the People's Republic of China, Ukraine, Angola, Vietnam, and Ethiopia, often interacting with platforms like the Dassault Mirage 2000, Saab JAS 39 Gripen, F-16 Fighting Falcon, and F-15 Eagle. Training, demonstration, and aerobatic teams such as the Russian Knights showcased the Su-27 at airshows including MAKS and Paris Air Show.

Variants

Variants were developed by Sukhoi and affiliated design houses and manufacturers, including improved avionics and multirole adaptations used by services such as the Russian Aerospace Forces and the People's Liberation Army Air Force. Major derivative projects involved collaboration with organizations like United Aircraft Corporation and Irkut Corporation, resulting in family members used for export and domestic service. Some variants were modernized with radars from NIIP and weapon integration from R-77 and R-73 programs, while production upgrades were handled at plants in Komsomolsk-on-Amur and maintenance depots in Lipetsk.

Operators

Current and former operators include national air forces and aerospace institutions: Russian Air Force, Aeroflot (historic test/support links), People's Liberation Army Air Force, Ukrainian Air Force, Angolan Air Force, Vietnam People's Air Force, Ethiopian Air Force, Indonesian Air Force, and others. Training and test units associated with the Gromov Flight Research Institute, Central Air Force Museum, and aerobatic ensembles like the Russian Knights have also flown the type. Transfer, lease, and export agreements were negotiated with ministries and state arms exporters such as Rosoboronexport.

Specifications

Key specifications reflected design goals pursued by Sukhoi and research partners at TsAGI and Lyulka: twin-seat and single-seat configurations, large internal fuel capacity for long-range escort comparable to the F-15 family, top speeds exceeding Mach 2.0 enabled by engines from Saturn and afterburning systems inspired by contemporary research at NPO Saturn. Avionics and armament options sourced from NIIP, Vympel, and Tikhomirov allowed carriage of missiles and stores similar in role to those used by NATO counterparts such as the AIM-9 Sidewinder and AIM-120 AMRAAM analogs like the R-73 and R-77.

Accidents and incidents

Accidents involving the Su-27 family have been investigated by organizations including the Interstate Aviation Committee and service accident boards of the Russian Ministry of Defence and partner air forces. Incidents occurred during peacetime training over ranges near Ivanovo, Krasnodar Krai, and test facilities at Zhukovsky as well as in operational theaters such as Syria and conflict zones involving Ukraine. High-profile occurrences involved demonstration teams like the Russian Knights and drew attention from national media outlets and aviation safety analysts within institutions such as the Gromov Flight Research Institute.

Category:Aircraft