Su-27UBK (Flanker-C) Russian Two Seat Combat Trainer Aircraft

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Basic Information

Name

Su-27UBK (Flanker-C) Russian Two Seat Combat Trainer Aircraft

Designation

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Alternate Designation

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Equipment Type

—

Manufacturer

Sukhoi

Date of Introduction

1988

Description

Su-27UBK Export Su-27UB two-seater. Su-27UB ("Flanker-C") Initial production two-seat operational conversion trainer. The Sukhoi Su-27 (Russian: Сухой Су-27; NATO reporting name: Flanker) is a Soviet-origin twin-engine supermaneuverable fighter aircraft designed by Sukhoi. It was intended as a direct competitor for the large United States fourth-generation fighters such as the Grumman F-14 Tomcat and F-15 Eagle, with 3,530-kilometre (1,910 nmi) range, heavy aircraft ordnance, sophisticated avionics and high maneuverability. The Su-27 was designed for 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 B-1B and B-52G/H bombers, protecting the Soviet coast from aircraft carriers and flying long range fighter escort for Soviet heavy bombers such as the Tu-95 "Bear", Tu-22M "Backfire" and Tu-160 "Blackjack". There are several related developments of the Su-27 design. The Su-30 is a two-seat, dual-role fighter for all-weather, air-to-air and air-to-surface deep interdiction missions. The Su-33 'Flanker-D' is a naval fleet defense interceptor for use on aircraft carriers. Further versions include the side-by-side two-seat Su-34 'Fullback' strike/fighter-bomber variant, and the Su-35 'Flanker-E' improved air superiority and multi-role fighter. The Shenyang J-11 is a Chinese licence-built version of the Su-27.

Air & Air Defense Specifications

Crew 2

Engine Afterburning Turbofan (75 hp)

Max Speed 2500.0 km/h

Service Ceiling 19000 m

Variants

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. Similar to the US F-15 Streak Eagle project. Between 1986–1988, it established and took several climb records from the Streak Eagle. Several of these records (such as time to climb to 3000m, 6000m, 9000m, 12000m) still stands current as of 2019.

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.

Su-27UB ("Flanker-C") Initial production two-seat operational conversion trainer.

Su-27SK Export Su-27S single-seater. Exported to China in 1992-1996 and developed into Shenyang J-11.

Su-27UBK Export Su-27UB two-seater.

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-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-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 aircraft in PVO service. 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.

System

Alternate Designation(s) Su-27UBK; NATO: Flanker-C

Primary Function / Type Two Seat Trainer Aircraft (Export)

Manufacturer Sukhoi

Crew 2

Number of Engines 2

Number of Hard Points 10 external pylons with a capacity of up to 4,430 kg (9,770 lb)

Dimensions

Length 21.9 m

Width (Wing Span) 14.7 m

Height 5.92 m

Wing Area 62 m2

Empty Weight 16,380 kg

Gross Weight 23,430 kg

Maximum Takeoff Weight 30,450 kg

Automotive

Engine Name 2 × Saturn AL-31F afterburning turbofan engines

Number of Engines 2

Engine Type afterburning turbofan engines

Engine Power 75.22 kN (16,910 lbf) thrust each dry, 122.6 kN (27,600 lbf) with afterburner

Maximum Speed 2,500 km/h

Range, at Altitude 3,530 km

Range, at Sea Level 1,340 km

Service Ceiling 19,000 m

G Limits +9

Rate of Climb 300 m/s

Thrust/Weight 1.07 with 56% internal fuel; 0.91 with full fuel

Main Gun System

System

Name Gryazev-Shipunov GSh-30-1

Type Autocannon

Caliber 30mm

Length 1,978 mm

Barrel Length 1,500 mm

Width 156 mm

Height 185 mm

Weight 46 kg

Barrels 1

Action Short recoil operated

Rate of Fire 1,800 rounds/min

Maximum Firing Range 1,800m

Effective Firing Range 200-1,800m

Ammunition

Type Rifle, Autocannon

Caliber 30mm

Shell 30×165mm

Basic Load 150 Rounds

Main Missile Systems

Main Missile System #1

Name Vympel R-27 (AA-10 Alamo)

Type Air-to-Air Missile

Basic Load 6 × R-27R/ER/T/ET/P/EP air-to-air missiles

Main Missile System #2

Name R-73E

Type Air-to-Air Missile

Basic Load 4 × R-73E AAMs

Rocket Weapon Systems

Rocket Weapon System #1

Name S-8KOM

Type HEAT Rocket

Length 1.57 m

Diameter INA

Weight 11.3 kg

Warhead Weight 3.6 kg (1.1 kg of Hecphol-5/A-IX-10 explosive)

Engine low smoke motor with powder BN-K.

Range 1.3 to 4 km

Velocity 400 mm versus RHA.

Armor Penetration Velocity 610 m/s.

Rocket Weapon System #2

Name S-13T

Type Tandem HEAT

Length 2.99 m

Diameter INA

Weight 75 kg

Warhead Weight 21 kg and 16.3 kg (1.8 kg and 2.7 kg of explosives)

Range 1.1 – 4 km

Velocity Velocity 500 m/s

Armor Penetration Combined penetration of 6 m of earth and 1 m of reinforced concrete.

Bomb Weapon Systems

Bomb #1

Name RBK-250

Type Cluster Bomb

Basic Load INA

Bomb #2

Name RBK-500

Type Cluster Bomb

Basic Load INA

Fire Control / Avionics

Fire Control System Type INA

Fire Control Radar Phazotron Zhuk-MSE radar

Navigation Radar N001E radar

Targeting System OEPS-27 electro-optical targeting system

Radar Warning Receiver SPO-15 Radar Warning Receiver

IRST OEPS-27 IRST

Protection

Stealth Properties No

Heat Signature Reduction INA

Add on Armor INA

NBC Protection Yes

EW Counter Measures INA

Chaffs/Flares INA

Image Sources

Notes https://www.armyrecognition.com/news/aerospace-news?option=com_content&view=article&id=673; https://www.jetphotos.com/photo/7463799; https://www.airliners.net/photo/Vietnam-Air-Force/Sukhoi-Su-27UBK/1712898;

Details

Country of Origin Russia

Category Trainers

Air > Trainers

Classification

Domain

Air & Air Defense

Equipment Status

Active

Dimensions

Length

21.9 m

Width

14.7 m

Height

5.92 m

Weight

23430 kg

Operators (2)

China

Vietnam

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