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JA 37 Viggen Saab
JA 37 Viggen
Multi-Role Fighter

The System 37 project was launched in 1960 to produce a family of aircraft with short takeoff and landing capability. The Viggen family was designed for multiple kinds of missions, including fighter (JA), attack (AJ), reconnaissance (SF, SH), and training (SK). The last to be built, the JA 37, was an interceptor with a secondary ground attack capability.

Although the Swedish requirements called for high standards in performance, sortie rates, and avionics, the Viggen successfully met its goals. A total of 329 Viggens were built, and the JA 37 fleet was continuously updated through the 1990s to operate newer weapons developed for the Gripen. However, the Gripen finally replaced the Viggen force by 2005.

Last modified 21 February 2011

First Flight (AJ 37) 8 February 1967
(SF 37) 21 May 1973
(SH 37) 10 December 1973
(JA 37) 27 September 1974
Service Entry

(AJ 37) 21 June 1971
(SF 37) April 1977
(JA 37) 1979

CREW: one: pilot



Wing Root unknown
Wing Tip


Length 53.81 ft (16.40 m)
Wingspan 34.77 ft (10.60 m)
Height 19.35 ft (5.90 m)
Wing Area 495 ft (46.0 m)
Canard Area


Empty 26,000 lb (11,800 kg)
Normal Takeoff 33,070 lb (15,000 kg)
Max Takeoff 37,500 lb (17,000 kg)
Fuel Capacity internal: unknown
external: unknown
Max Payload

13,000 lb (6,000 kg)

Powerplant one Volvo Flygmotor RM8B afterburning turbofan
Thrust 16,200 lb (72.1 kN)
28,100 lb (125 kN) with afterburner

Max Level Speed at altitude: 1,320 mph (2,125 km/h) at 36,000 ft (10,975 m), Mach 2
at sea level: 840 mph (1,335 km/h), Mach 1.1
Initial Climb Rate 40,000 ft (12,200 m) / min
Service Ceiling 60,000 ft (18,300 m)
Range typical: 540 nm (1,000 km)
ferry: 1,080 nm (2,000 km)
g-Limits unknown

Gun one 30-mm Oerlikon KCA cannon (150 rds)
Stations seven external hardpoints
Air-to-Air Missile AIM-9 Sidewinder (RB24, RB74), AIM-4 Falcon (RB27), Skyflash (RB71), AIM-120 AMRAAM (RB99)
Air-to-Surface Missile none
Bomb 120-kg bombs
Other 135-mm rocket pods, U95 ECM pod

AJ 37 Single-seat all-weather attack aircraft with a secondary fighter role; 110 built
JA 37 Single-seat interceptor with a secondary surface attack capability; 149 built
JA 37C Upgrade for older JA 37 airframes providing improved avionics
JA 37D, JA 37Di Upgrade programs for the JA 37 fleet to install new avionics and software
SF 37 Single-seat all-weather armed photo-reconnaissance model with a modified nose containing cameras, infrared sensors, and ECM equipment in place of a radar; 26 built
SH 37 Single-seat all-weather ocean surveillance model with a search radar in the nose and equipped with anti-ship missiles; 26 built
SK 37 Two-seat trainer without a radar; 18 built
SK 37E SK 37 aircrames modified as electronic warfare trainers; 10 converted




Sweden, Svenska Flygvapnet (Swedish Air Force)


JA 37 Viggen

  • Bishop, Chris, ed. The Encyclopedia of Modern Military Weapons: The Comprehensive Guide to Over 1,000 Weapon Systems from 1945 to the Present Day. NY: Barnes & Noble, 1999, p. 242, 272, 277-278, 301.
  • Donald, David, ed. The Complete Encyclopedia of World Aircraft. NY: Barnes & Noble, 1997, p. 812-813.
  • Gunston, Bill, ed. The Encyclopedia of Modern Warplanes. NY: Barnes & Noble, 1995, p. 238-240.
  • Isby, David C. Jane's Fighter Combat in the Jet Age. London: Harper Collins Publishers, 1997, p. 182.
  • Munro, Bob and Chant, Christopher. Jane's Combat Aircraft. Glasgow: Harper Collins Publishers, 1995, p. 202-203.
  • Paul Nann's Military Aviation Photo Gallery
  • Rendall, David. Jane's Aircraft Recognition Guide, 2nd ed. London: Harper Collins Publishers, 1999, p. 91.

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