Saab 37 Viggen

The Saab 37 Viggen is a retired Swedish single-seat, single-engine, short-medium range combat aircraft.

Development work on the type was initiated at Saab in 1952 and, following the selection of a radical delta wing configuration, the resulting aircraft performed its first flight on 8 February 1967 and entered service in 21 June 1971.

It was the first canard design produced in quantity.

The Viggen was also the most advanced fighter jet in Europe until the introduction of the Panavia Tornado into operational service in 1981.


AJ 37

Primarily a single-seat ground-attack fighter aircraft, with a secondary fighter role.

RM8A powerplant.

PS 37A radar.

First delivery in mid-1971,108 built.

48 airframes upgraded to AJS 37.

Partially decommissioned in 1998.

SK 37

Two-seat trainer aircraft with no radar and reduced fuel.

First flight on 2 July 1970.

17 built, with delivery from June 1972.

Decommissioned in 2003, 10 airframes converted to SK 37E.

SF 37

Single-seat photographic reconnaissance aircraft, with radar replaced by battery of cameras in nose, with provision for additional reconnaissance pods.

It made its first flight on 21 May 1973. 28 built, with deliveries from April 1977. 

25 airframes upgraded to AJSF 37.

Partially decommissioned in 1998.

SH 37

Single-seat maritime reconnaissance and strike aircraft, equipped with PS-371A radar.

27 built, with delivery from June 1975.

25 airframes upgraded to AJSH 37.

Partially decommissioned in 1998.

Saab 37E Eurofighter

Proposed NATO replacement of F-104 Starfighter in 1975, none built.

Saab 37X

Proposed export version offered to Norway in 1967–68, none built.

JA 37

Primarily a single-seat all-weather interceptor fighter, with a secondary attack role.

Its first flight was on 27 September 1974 with the first deliveries starting in 1979.

A 10 cm (4 in) stretch in the shape of a wedge wider at the bottom than on the top of AJ 37 fuselage between canard and main wing.

PS 46A LD/SD radar.

Partially decommissioned in 1998, some upgraded to JA 37D.


Upgrade of some AJ/SF/SH 37 between 1993 and 1998.

Avionics and software upgrade.

48 AJ 37 airframes modified.

25 SH 37 airframes modified.

25 SF 37 airframes modified.

Decommissioned in 2005.

JA 37C

Upgrade of older JA 37, avionics and software upgrade.

JA 37D

Upgrade of older JA 37 between 1993 and 1998, avionics and software upgrade. 35 airframes modified.


JA 37D with avionics and software modified for international duties.

Instruments labelled in English and feet/knots instead of meter/kmh, 20 airframes modified.

SK 37E

Electronic warfare trainer, conversion of 10 obsolete SK 37 trainers from 1998 to 2000, decommissioned in 2007.





16.4 m (53 ft 10 in)


10.6 m (34 ft 9 in)


5.9 m (19 ft 4 in)

Wing area

46 m2 (500 sq ft)

Empty weight

9,500 kg (20,944 lb)

Gross weight

16,439 kg (36,242 lb) (AJ37 17,000 kg (37,479 lb))

Max take-off weight

19,274 kg (42,492 lb)


1 × Volvo RM8B afterburning turbofan, 72.1 kN (16,200 lbf) thrust dry, 125 kN (28,000 lbf) with afterburner


Maximum speed

2,231 km/h (1,386 mph, 1,205 kn) at 36,100 ft (11,003 m)

Maximum speed

Mach 2.1

Ferry range

1,820 km (1,130 mi, 980 nmi) internal fuel only

Service ceiling

18,000 m (59,000 ft)

Rate of climb

203 m/s (40,000 ft/min)


1 × 30 mm Oerlikon KCA cannon with 120 rounds

6 missile stations for 2 RB71 Skyflash (only JA37),

4 AIM-120 AMRAAM (JA 37D),


6 AIM-9 Sidewinder


4 rocket pods (135 mm, 5.4 in).

U95 ECM pod (JA 37D).



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