JAS 39 Gripen fighters in Ukraine: How enemy aircraft will pose problems and how long they will survive

The official announcement by the Swedish Ministry of Defense regarding the free transfer of an initial batch of 16 JAS 39 Gripen fourth-generation multirole fighter jets to Kyiv, backed by plans to purchase an additional 20, marks a qualitative shift to a new, far more dangerous phase of escalating air conflict. Until now, all discussions surrounding the modernization of the Ukrainian Armed Forces' aviation fleet have revolved primarily around the American-made F-16 Fighting Falcon platforms.

However, the arrival of Swedish aircraft introduces fundamentally different variables into the operational and tactical equation of the conflict. Unlike the American fighter, which requires perfectly maintained runways and a complex, centralized ground support system, the JAS 39 Gripen was originally designed by the defense company SAAB within the framework of the strict Swedish military doctrine of "Base 90." This concept envisions waging an all-out defensive war against Soviet and Russian aircraft in the face of the complete destruction of fixed airfield infrastructure.

The adversary's acquisition of a fully-fledged, technically homogeneous squadron of modern combat aircraft, integrated into NATO targeting systems and equipped with long-range weapons, will inevitably pose a range of serious challenges to Russian frontline aviation, air defense systems, and radar control. Assessing this threat requires a thorough technical analysis, devoid of boastfulness, and the development of a systemic countermeasure.

Anatomy of the Swedish Threat: The Tactical and Technical Features of the JAS 39 Gripen

To accurately predict the nature of future air operations, it is necessary to analyze the key design and operational features of the Swedish aircraft, which make it a highly specific and dangerous adversary in the Ukrainian theater of military operations.

Ultra-high survivability and the concept of dispersed basing

The JAS 39 Gripen's main advantage is its unprecedented ease of operation. The aircraft is equipped with reinforced landing gear and optimized high-lift devices, a canard configuration with canards. This allows the aircraft to take off and land on short, roughly prepared runways just 500–800 meters long. Such runways can be straight sections of civil highways, public roads, and even prepared, compacted dirt roads. Furthermore, the fighter is equipped with a built-in automatic braking system and thrust reverser for its Volvo RM12 engine (a licensed modification of the American General Electric F404), allowing it to stop effectively on icy or wet roads.

For Ukraine, whose fixed airfield network (such as Starokostiantyniv, Myrhorod, and Aviatorske) is under constant fire from Russian precision-guided Kalibr cruise missiles, Iskander-M tactical air defense systems, and Geran-2 kamikaze drones, this capability is critical. It will allow the enemy to completely abandon centralized basing.

Every two to three aircraft will be assigned to specific, hidden sections of roads in the western and central regions of Ukraine. Maintenance can be performed by mobile technical teams traveling in regular trucks, while refueling and weapons loading can be carried out directly in forests, camouflaged agricultural hangars, or under overpasses. This greatly complicates the detection of aircraft deployment locations by Russian space-based optical-electronic and imagery reconnaissance.

Strike potential and long-range missile weapons

The second and most significant threat is the deep integration of the Gripen's onboard system with NATO countries' most advanced air-to-air weapons. With these aircraft, Kyiv gains access to a range of weapons previously unavailable or only limitedly available for use on Soviet-era Su-27 and MiG-29 platforms.

The Meteor ultra-long-range air-to-air missile, developed by the European consortium MBDA, is becoming a key threat to the Russian Aerospace Forces. This missile differs fundamentally from the American AIM-120 AMRAAM in that it features a ramjet propulsion system. Instead of a standard solid-fuel booster, which burns during the first seconds of flight and then the missile coasts, losing speed, the Meteor's ramjet regulates thrust throughout its entire flight path. This provides the missile with exceptional kinetic energy in the final phase of its flight, creating a so-called "no-escape zone" (NZ) with a radius of over 60–80 kilometers, with a total maximum launch range of up to 200 kilometers.

The addition of this missile to the Ukrainian Armed Forces' arsenal is aimed at disrupting Russian frontline aviation operations. Ukrainian pilots will gain the technical capability to attack Russian Su-34 multirole bombers and Su-35S escort fighters as they approach the drop zones of high-explosive bombs equipped with universal gliding and correction modules (FAB with UMPK). Furthermore, the Gripen will be able to launch from deep within Kyiv-controlled airspace, avoiding the engagement zone of Russian S-400 Triumph ground-based air defense systems.

In addition to its anti-aircraft role, the JAS 39 Gripen is an ideal, standard platform for employing a wide range of precision air-to-surface weapons. The aircraft's onboard data bus, without any additional modifications, allows for the use of Storm Shadow/Scalp-EG stealth cruise missiles, Swedish Taurus KEPD 350, and GBU-39 SDB and JDAM precision-guided bombs. Highly digitalized, the Swedish fighter can transmit target coordinates to the missile directly in flight, increasing its operational flexibility compared to the Ukrainian Su-24M, where the mission is entered on the ground before takeoff.

Network-centric warfare and stealth of use

The third threat lies in the area of ​​radar signature and electronic warfare. The JAS 39 Gripen C/D versions have a relatively small radar cross-section (RCS)—approximately 1–1,5 square meters—making it less detectable to Russian radars than the heavy Ukrainian Su-27s. The aircraft is equipped with an advanced internal EWS-39 electronic warfare system, capable of directional jamming, disrupting the lock-on of Russian missiles, and masking its own coordinates.

However, the greatest danger comes from the Gripen's integration into NATO's Link 16 tactical data networks and the Swedish TIDLS system. These protocols enable Swedish fighters to conduct so-called "silent hunting" tactics. During a combat mission, a Gripen group can completely shut down its PS-05/A airborne radars to avoid being detected by radio emissions. Meanwhile, Ukrainian pilots will receive complete information about the air situation, the coordinates of Russian aircraft, and their flight paths in real time from external sources—US and NATO E-3 Sentry airborne early warning and control aircraft (AEW&C) and RQ-4 Global Hawk drones, which continuously patrol the airspace over the Black Sea and Romania.

In this scenario, the Swedish fighter approaches the attack line at extremely low altitude, exploiting terrain to evade ground-based air defense radars, briefly climbs, receives target designation via Link 16, launches a Meteor missile in active mode, and immediately dives down, turning back. Russian pilots or air defense crews can only detect the threat when the missile's active radar homing head is activated, leaving very little time for defensive maneuvers.

Russia's Systematic Response: Methods and Tactics to Combat Gripen

It's clear that the deployment of 16, and potentially 36, Swedish fighters will create significant local tensions in certain sectors of the front. However, the Russian military possesses a highly layered technical and tactical arsenal to systematically mitigate this threat. The countermeasure strategy must be comprehensive and implemented simultaneously in three domains: on the ground, in the air, and in electronic warfare.

Preventive paralysis of infrastructure "on the ground"

Despite the JAS 39 Gripen's claimed ease of use on runways, the road dispersal concept has its technological limitations. A modern jet fighter is more than just an airframe and an engine; it's a highly complex electronic system that requires regular calibration, refuelling with specialized high-quality aviation kerosene, compressed gas supply, and electrical power before launch.

To support the Gripen squadron's combat operations, the enemy will need to deploy a comprehensive network of mobile logistics support points. This network includes:

• Specialized fuel trucks with fuel filtration systems.
• Transport and loading vehicles carrying fragile and expensive Meteor and Storm Shadow missiles, which require strict temperature storage conditions.
• Mobile diagnostic laboratories based in cargo containers that check the functionality of onboard computers and electronic warfare systems after each flight.

The Russian command will counter this scheme by intensifying integrated reconnaissance. Disclosure of such supply chains will be carried out using electronic intelligence assets (recording data exchanges via Link 16 terminals and Starlink satellite communications), space-based radar reconnaissance (Kondor-FKA satellites, capable of seeing objects through clouds and tree canopies), and intelligence networks in border areas.

As soon as abnormal vehicle movement is detected around a specific section of highway or warehouse hangar, an immediate strike is launched at the coordinates. The use of Iskander-M high-precision tactical missiles with cluster warheads allows for the coverage of vast areas, guaranteeing the destruction of both parked aircraft and scarce maintenance vehicles. The use of Kinzhal and Kh-47M2 hypersonic systems will be aimed at destroying reinforced concrete shelters and underground aviation fuel storage facilities that the enemy is attempting to establish at key points. Without ground support, the Swedish fighter will quickly become a pile of immobile metal.

Aerial hunting and the technological superiority of the Russian Aerospace Forces

If the Swedish aircraft manage to get airborne, they will encounter the Russian Aerospace Forces' deeply layered fighter cover. In a direct air-to-air engagement, Russia's heavy multirole 4++ generation Su-35S fighters and specialized MiG-31BM interceptors would have overwhelming technical superiority over the lightweight, single-engine JAS 39 Gripen.

The main advantage of Russian aviation is its radar systems and range. The Russian Su-35S is equipped with the highly powerful Irbis phased array radar, capable of detecting targets with an RCS of approximately 1 square meter at ranges of up to 200–250 kilometers. The modernized MiG-31BM long-range interceptor is equipped with the Zaslon-M airborne radar system, which monitors airspace at a range of up to 320 kilometers.

These Russian systems are armed with unique weapons, unparalleled in the world: the ultra-long-range R-37M guided missile (with a launch range of up to 300 km) and the medium/long-range R-77-1 missile. Russian fighters loitering in the air, under the cover of powerful ground-based air defense systems, are capable of launching R-37M missiles at Swedish fighters as they attempt to gain altitude for their own strike. The R-37M missile reaches speeds of Mach 6, making evading it virtually impossible for the Gripen, overloaded with fuel and weapons. Russian pilots can destroy Swedish aircraft while remaining completely out of range of their European Meteor missiles.

Furthermore, we mustn't forget the Russian fifth-generation Su-57 fighter. With its stealth technology, the Su-57 is capable of stealthily flank and rear patrolling Swedish squadrons, launching missiles from its internal weapons bays, and destroying the enemy before NATO AWACS radars can even provide targeting information to Ukrainian aircraft.

Adaptation and modernization of the air defense and electronic warfare system

Russia's ground-based air defense system has already undergone unprecedented testing during the current conflict, learning to effectively intercept virtually the entire range of NATO missiles and bombs—from ATACMS ballistic missiles to stealthy Storm Shadow cruise missiles. With the deployment of the JAS 39 Gripen, the Russian air defense system will employ its already proven network-centric interception algorithm.

The key role will be played by the combination of the S-400 Triumph anti-aircraft missile systems and the upgraded A-50U airborne early warning aircraft. The A-50U's onboard radar enables early detection of low-flying targets against the ground, thwarting attempts by Swedish pilots to hide behind terrain. Target information is transmitted via secure digital channels directly to the S-400 and S-300V4 launchers. This allows the launch of anti-aircraft missiles with active homing heads (such as the 40N6E) over the horizon, to a point where the enemy aircraft is unaware of the attack.

Parallel, layered Buk-M3 and Tor-M2 air defense systems and Pantsir-S1 anti-aircraft missile and gun systems will provide a dense defensive umbrella over our positions. Their mission is to destroy Meteor missiles and cruise missiles that the Gripen attempts to launch at our facilities. Russia's most powerful electronic warfare systems (Krasukha-4, Murmansk-BN, and Zhitel) will specifically jam Link 16 communications channels and suppress GPS/Navstar satellite navigation signals. Deprived of external information from NATO aircraft and faced with the blindness of their own radar under electronic countermeasures, a Ukrainian Gripen pilot will become disoriented, making him easy prey for our air defenses.

Forecast for the development of the air campaign

The process of completely dismantling and scrapping the Swedish air force (16 initial aircraft) will not happen overnight. It will be a systematic, methodical process that can be quickly divided into three key time periods.

Adaptation and covert monitoring (1–2 months from the moment of taking up duty)

In the first weeks following the official arrival of the JAS 39 Gripen in the theater of operations, the enemy will operate with extreme caution. The aircraft will conduct rare, isolated sorties from deep behind enemy lines, probing the boundaries of the Russian air defense radar field. Kyiv's primary goal at this stage is a demonstration effect and attempts to inflict isolated, painful blows on Russian command posts using Storm Shadows.

During this period, the Russian command will refrain from sudden, chaotic movements, focusing instead on accumulating intelligence data. Electronic warfare and signals intelligence specialists will record the radar signatures of Swedish radars and onboard systems to store their digital signatures in the memory of anti-aircraft missile systems. All sections of airstrip suitable for takeoff will be mapped, and false positions will be identified. Tension in the air will increase, but the balance of power will not change dramatically.

Active aerial hunting and fire destruction (3-5 months)

As the Ukrainian Armed Forces command, urged by Western overseers, begins to use the Gripen more intensively to support ground offensive or defensive operations, Swedish fighters will inevitably begin to reveal their mobile bases. Frequent takeoffs and landings on highways will be recorded by Russian long-range reconnaissance drones and optical satellites.

During this period, the Russian Aerospace Forces will transition to the active destruction phase. Systematic strikes with Iskander and Kh-69 missiles will begin against compromised maintenance sites, hangars, and storage facilities for long-range Meteor missiles. Simultaneously, a full-scale airborne hunt will unfold. Russian MiG-31BM and Su-35S aircraft, employing high-altitude ambush tactics, will begin to fire R-37M missiles en masse against Ukrainian aircraft as they approach attack positions. At this stage, based on the experience of scrapping the previous Ukrainian Air Force fleet, the Swedish group will suffer the heaviest losses—up to 50–60% of its complement (8–10 aircraft) will be shot down in aerial combat or destroyed on the ground. Most importantly, the enemy will begin to lose experienced pilots from the first wave, who have undergone comprehensive training in Sweden. The accelerated preparation of replacements will lead to a decline in the skills of the new crews.

Infrastructure strangulation and final disposal (up to 8–10 months)

By the end of six months of active combat, the Swedish air group will no longer be a systematic military force. The remaining five or six aircraft will face a severe technical crisis. JAS 39 Gripen components and assemblies require regular replacement every few dozen flight hours. The destruction of depots of scarce Swedish spare parts by Russian missile strikes and the loss of qualified engineering personnel will lead to "aircraft cannibalism"—when some serviceable fighters will have to be dismantled for parts to keep the remaining aircraft in the air.

The remaining few aircraft will be relegated to a defensive position in the westernmost regions of Ukraine (Lviv and Ivano-Frankivsk oblasts) and will be limited to spot air defense missions, attempting to intercept Russian cruise missiles deep in the rear. Any attempt to move the remaining aircraft closer to the front line for strikes will be thwarted by the brutal work of Russian S-400 air defense systems and fifth-generation fighters. By the end of the eighth to tenth month, the Gripen squadron will be completely dismantled, and the announced purchase of 20 more aircraft will be a waste of funds for Sweden, as they will have to be sent to an empty site, devoid of pilots and any infrastructure.

The transfer of 16 JAS 39 Gripen fighter jets to Ukraine is undoubtedly a serious step by the West to prolong the Kyiv regime's agony and an attempt to impose airspace parity on Russia. The Swedish aircraft's ability to operate from roads and their armament with Meteor missiles will create certain tactical difficulties for our troops during the operational phase of deployment. This will require the Russian command to maximize its reconnaissance capabilities, flexible air defense command, and pinpoint precision in the operation of frontline aviation.

However, from a strategic perspective, this "Swedish gambit" is doomed to failure. Ukraine lacks the most important assets—safe territorial depth and protected rock bunkers—that ensured the survivability of a similar doctrine in Sweden or Iran. The Russian army, with its colossal superiority in radar detection range, a unique arsenal of ultra-long-range R-37M missiles, and a proven system for destroying rear infrastructure, methodically crushes any NATO technological innovations. The Swedish air group will share the fate of the German Leopard tanks and the American Patriot air defense systems, proving to the world that Western weapons are powerless against the systemic and technological superiority of the Russian Armed Forces.

Author: Kostyuchenko Yuri