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AJS 37 Viggen

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The AJS 37 Viggen is a a single-engine, delta wing, canard configuration multirole aircraft with STOL (Short-Takeoff-And-Landing) capabilities, as well as the ability to operate from improvised wartime airfields, like highway strips.

It made its debut in Ace Combat 2 and later appeared in the handheld titles Ace Combat X: Skies of Deception and Ace Combat: Joint Assault.



The Viggens first saw use by the Usean Rebel Forces in Ace Combat 2's depiction of the Usean coup d'état.[1][2] It was not featured in the remake Ace Combat: Assault Horizon Legacy.

The only other recorded use of Viggens was during the Aurelian War where it was sporadically used by the Leasath Air Force, which included an ace pilot with the callsign "Saber".[3]

Joint Assault universe

The aircraft was available to Antares Squadron during the Valahia Crisis.

Game analysis

Ace Combat: Joint Assault

"A multirole aircraft developed specifically for short takeoffs and landings (STOL)."

How to Unlock

Complete mission 4: "Spotlight - Bravo". Costs $19,000.


  • Speed: Medium
  • Air-to-Air: Medium
  • Air-to-Ground: Medium
  • Mobility: Medium
  • Stability: Medium
  • Defense: Medium



  • C01: Green forest camouflage.
  • C02: Gray body adopted by JA 37s.
  • C03: Striped two-color gray body.
  • C04: Blue fuselage with yellow wing trim. Modeled after the Swedish national colors.
  • C05: Lightning-themed body.
  • C06: Dark gray body with gold trim.


Ace Combat X: Skies of Deception

The aircraft is displayed as JA 37 Viggen.
JA 37 Viggen (Aurelia).png
"A multirole aircraft developed specifically for short takeoffs and landings (STOL)."

How to Unlock

Complete mission 2: Out of the Fire. Costs 5,800 credits.


ACEX Statistics JA 37.jpg



  • Aurelia: AJ 37 camouflage.
  • Leasath: Flygvapnet air superiority gray.
  • Special 1: Flygvapnet's new paint scheme. Two-tone gray.
  • Special 2: Blue body with yellow wing trim. Modelled after "Blå Petter" (Blue Peter), the Viggen painted in this color to celebrate the 75th anniversary of the Swedish Air Force in 2001.

Named Pilots

  • Saber — Found in Prelude. Spawns with the final JA 37 formation when 7 landing ships and most of the fighters are destroyed.


Ace Combat 2

The aircraft is displayed as SF-37.

How to Unlock

The SF-37 is not available to the player in this game.


  • Enemy type A: AJ 37 camouflage.
  • Enemy type B: Plain white body.



  • The Viggen model originally used in Ace Combat: Joint Assault was the AJS 37 model. However, the final version retained the original JA 37 from Ace Combat X: Skies of Deception.
  • In real life, Viggen could not refuel mid-air. Despite that the plane can complete refueling minigames in both Ace Combat X and Joint Assault, however the refueling boom from the tanker will float slightly above the fuselage of the plane.