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The Stridsvagn 103 (Strv 103), also known as the Alternative S and S-tank,[4] is a Swedish Cold War-era main battle tank, designed and manufactured in Sweden.[5] "Strv" is the Swedish military abbreviation of stridsvagn, Swedish for tank (literally combat wagon, it also is the Swedish word for chariot), while the 103 comes from being the third tank in Swedish service to be equipped with a 10.5 cm gun.

Key Information

Developed in the 1950s, it was the first main battle tank to use a gas turbine engine and the only mass-produced tank since World War II to not use a turret besides the German Kanonenjagdpanzer, which is not classified as a tank by role, but by design.[6] It has an unconventional design with a unique gun laying process:[7][8][9] it is turretless with a fixed gun traversed by engaging the tracks and elevated by adjusting the hull suspension.[6] The result was a very low-profile design with an emphasis on survivability and heightened crew protection level.

Strv 103s formed a major portion of the Swedish armoured forces from the 1960s to the 1990s, when, along with the Centurions, it was replaced by the Leopard 2 variants Stridsvagn 121 and Stridsvagn 122.[10]

While most turretless armoured fighting vehicles are classified as assault guns or tank destroyers, the Strv 103 is considered a tank since its designated combat role matched those of other tanks within contemporary Swedish doctrine.

History

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Concept development

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In the early 1950s, the Royal Swedish Army Materiel Administration's Ordnance Department began development of a new tank known as kranvagn, or KRV. The desired features were a weight around 30 tonnes with high gun performance, protection and mobility. The new design emerged with a very low-profile hull with a tall and highly angled turret mounting a large-calibre main gun and autoloader system, reducing the crew to three. 105 to 120 mm guns were initially considered, with the 120 being favoured, and later a 155 mm design was also considered. The overall design is very similar to the French AMX-50.[11]

Around this same time, they also approached the United Kingdom about purchasing the Centurion tank. The Centurion included a gun stabilizer, much better mobility, and a number of other features that made it much more advanced than the KRV. Although the British proved interested, they stated that deliveries could not begin until the 1955 or 56 time-frame, after their own needs were filled. Then, in 1953, due in part to a need for increased foreign currency, the UK offered to deliver the Centurion immediately. This offer was taken up, and KRV work continued only to produce two hulls for study.[11]

While the Centurion was a great advance on the KRV, it was still considered much heavier than ideal given its firepower. In the mid-1950s, the Royal Swedish Army Materiel Administration's Ordnance Department put out a contract to find a replacement. Two working groups were formed to consider different approaches. "Alternative A" (for "Anglo-American") was to purchase a design from either the British or Americans of roughly 50 tons but mounting a more powerful gun than the Ordnance QF 20-pounder of the existing Centurions. "Alternative T" ("Tysk-Fransk", or "German-French") was for a lighter tank of around 30 tons with less protection but better mobility. In 1956, Sven Berge of the Swedish Arms Administration proposed "Alternative S" ("S" standing for "Swedish"), a radically different solution.[11]

Alternative S

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As part of the Centurion purchase, the UK had supplied volumes of data from World War II and Korean War tank engagements. These demonstrated that a full half of all "kills" were due to hits on the turret or the turret ring. Hits on the lower portion of the tank were much more rare. These statistics also suggested that the chance of being hit was strongly related to the overall height of the tank.[11]

In 1943, Berge had read reports of the 1940 French Char B1 design. This featured a large (for the era) gun in the hull that was fixed in azimuth, and required the entire tank to turn to aim it. This was accomplished through the use of a complex transmission system under the gunner's control. Berge had also been part of the teams that examined German vehicles after the war, and was aware of the ability for short vehicles to quickly maneuver.[11]

Berge combined these concepts for the S proposal. The suspension would be connected to a stabilizer from Bofors that would keep the entire tank stabilized as opposed to just the gun. He felt the stabilizers of the era did not offer the performance needed for real fire-on-the-move; while a first shot may be made on the move, the tanks generally stopped for follow-up shots. He felt that the advantage offered was limited, and that better protection when stopped would be more useful.[11]

The resulting chassis was quite small, with only four road wheels, and the gun extended through the vehicle to the rear where the autoloader and ammunition was stored outside of the crew compartment. The resulting 30 ton design offered the same level of armour as the heavy tanks, but was better protected overall due to the external ammunition and very low profile.[11]

Prototypes

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Tank mobility trials in 1966

A spring 1957 meeting to consider the various designs resulted in "S" raising enough interest that a demonstration of its design features was needed.[11] A small contract was let to demonstrate that the suspension system could be used for aiming. This led to experiments using a surplus M4 Sherman and Infanterikanonvagn 103 vehicles fit with external systems that moved the suspension. These seemed promising, so one of the test hulls from the earlier KRV program was adapted for more rigorous testing and the first application of the stabilizer. This was later modified to remove the first and sixth road wheels to make a layout with greater similarity to the S proposal.[11]

As part of the Försvarsbeslut 1958 (defence plan of 1958) deliberations, the Riksdagen (Swedish parliament) debated the three Alternatives. S would be the most expensive, but it was ultimately selected for the symbolic value of a domestic tank in a neutral country, as well as the spin-off effects on Swedish industrial competence. On 4 February 1958, a contract was released for two prototype hulls, S1 and S2. Volvo was selected to build the engine system and AB Landsverk the drive trains. S1 used an electric motor for power, supplied by a generator trailer, and was used to test the suspension system. S2 included the Volvo-designed Diesel-turbine hybrid engine and was used to test the drivetrain and flotation system. These were also successful, and in 1960, an order was placed for ten pre-production vehicles.[11]

By this time, the UK had offered the latest Centurion Mk. 10, which featured the famed Royal Ordnance L7 105 mm gun. The gun had been licensed for production in Sweden and would be available shortly, so the decision was made to replace the much larger guns originally conceived with the 105 in order to save development costs. For the S, it was lengthened to L/62 from the original L/52 to allow more powerful charges to be used. Because the gun was fixed in place, with no recoil movement, the autoloader was able to reach a very high rate of firing every three seconds.[11] This led to the production design being given the name "Stridsvagn 103", meaning the third design mounting a 10 cm gun.

An early production vehicle in 1967

The first of these "zero series" vehicles arrived in 1963. During testing, it was noticed that while a two-man crew could operate the vehicle successfully, other tasks became more difficult. Notably, it made operating in the field more difficult because a two-man crew was not enough to perform guard duty or easily perform track maintenance or reloading ammunition. The decision was made to add a third member, assigning them to operate the radios as well as having a second set of controls and vision systems to allow them to drive the tank in reverse at high speed.[11]

The vehicle was first shown to the public in the spring of 1963. It was an immediate worldwide sensation. John F Kennedy expressed an interest in the design, leading to a memo by Robert S McNamara noting:

Their new tank has advantages over our M60 in its low silhouette, lighter weight and amphibious capability. On the other hand, it is incapable of concurrent automotive movement and all-around engagement of targets. While the Army fully recognizes the advantages in the Swedish design, it considers this new tank to be more nearly a defensive tank destroyer or assault gun rather than a tank within the Army's concept of employment of tanks.[11]

Into production

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The zero-series success led to a fall 1964 production order for 70 examples.[11] The first production examples began to arrive in 1967. These demonstrated that the original 300 horsepower (220 kW) Boeing T50 turbine was underpowered, and a new 490 horsepower (370 kW) design from Caterpillar was introduced for the second production batch, the 220 S103B models, which began to arrive in 1970. These engines were retrofit to the earlier examples as well. The production of 290 production models was complete by 1971.[11]

Later updates

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Plans during the 1970s called for new tanks to be introduced in the 1980s, but these were later pushed back to the 1990s. This led to a round of improvements for the S103's in service, producing the S103C. The changes were to replace the 240 horsepower (180 kW) Rolls-Royce K60 with the 290 horsepower (220 kW) Detroit Diesel Series 92, new tracks from Diehl Aerospace, external fuel tanks along the sides of the vehicle, a laser rangefinder, and the addition of the dozer blades to all of the tanks, instead of every third vehicle. Conversions began in 1986 and were complete by 1988.[11]

There was some development of a S103D model carried out in the 1990s. Yet another turbine was used, along with a nuclear biological chemical filter system, a new ballistic calculator able to fire on moving targets, a muzzle reference system, better damping of the suspension, improved frontal armor and a separate stabilizer for the commander's machine gun. By this time the newer foreign tanks were selected for purchase and the D-series modifications were not carried out.[11]

Design

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The Strv 103 in a "hull down" position presents a very low profile compared to conventional, turreted tank designs.

Studies of casualty reports from World War II and the Korean War revealed that the risk of being hit in combat was strongly related to height, with more than half of tank losses being the result of the turret being penetrated. Berge therefore concluded that any new design should be as low as possible.[citation needed] The radical solution was to eliminate the turret, which would also dispose of a vulnerable target area and make the tank much lighter. In terms of absolute height, the final design did not give the Strv 103 any significant advantage over its most likely opponent, the T-62. The latter was just slightly taller with 2.20 m (7 ft 3 in) in height with its turret versus the 2.14 m (7 ft 0 in) of the Strv 103. On the other hand, the Swedish Centurions towered over both with their 2.94 m (9 ft 8 in) – 3.01 m (9 ft 11 in) in height. However, the T-62 paid for its low profile with an extremely cramped interior and lack of gun depression. Tanks are often deployed in hull-down firing positions, either behind dug entrenchments or using the crest of a hill, in order to reduce the exposure of the vehicle to enemy fire. In this firing position, the level of exposure is determined by the distance between the bottom of the gun barrel and the top of the turret or vehicle, and the angle to which the vehicle is able to depress the gun barrel. Since the Strv 103 orients the entire tank to depress and elevate the barrel, in a hull down position it has very little apparent height and subsequent visual profile to the enemy. It could also lower the hull a further 13 centimetres (5.1 in) by adjusting the suspension.[citation needed]

Strv 103 demonstrating its hydropneumatic suspension system and gun elevation.

Being familiar with both the French Char B1's precision transmission, the exceptional turning performance of the short tracked assault guns, and the combat performance of the German StuG and Jagdpanzer series inspired Berge's design to solve the aiming problem through the use of a fully automated transmission and suspension system, which precisely turned and tilted the tank under the gunner's control. The gun itself would be fixed to the hull.[11] This made it impossible to use a stabilised gun. As a result, the tank could not accurately move and fire at the same time, but the Swedish experience with Centurions suggested that, in order for tanks to reach acceptable accuracy, they would need to come to a halt anyway, and erroneously[improper synthesis?] estimated that no breakthrough in stabilisation technology was likely within the foreseeable future.

Other features of the tank were also quite radical. The rifled gun, a Bofors 105 mm L74 with a barrel length of 62 Calibers, was able to use the same ammunition as the British Royal Ordnance L7, and would be equipped with an autoloader allowing a rate of fire of one round every three seconds, also allowing the crew to be reduced to two; a gunner/driver and the commander (most designs of the era used a crew of four), with one person being able to handle all functions of the tank from the ordinary position due to duplicate controls. This would of course only be used in emergencies, as the workload would be overwhelming, but apart from providing redundancy it also allowed the crew to shift tasks between them as situation required. The concept went through practical tests, that quickly revealed that a two-man crew would not be self-sufficient when considering the many tasks not directly related to handling the tank: in particular, routine maintenance, bivouacking, track-changes and reloading in field. While the last issue could have been solved by adding staff to the ammunition crews, it was decided that a third crew-member was needed. To enhance combat effectiveness, the third man was to be assigned as a rear driver/radio operator, facing the rear of the tank and equipped with a complete setup for driving. This allowed the tank to be driven backwards at the same speed as forwards, keeping its frontal armour pointed at the enemy, while relieving the commander of routine radio duty. The commander and gunner/driver both had the same set of sights and controls to fire the gun and drive the tank.

A Stridsvagn 103C demonstrates gun elevation and depression using suspension, Revingehed, Sweden, 2013

The tank was uniquely powered by two different kind of engines, a 240 horsepower (180 kW) Rolls-Royce K60 opposed-piston diesel for slow cruising and manoeuvring the tank in aiming, and a 300 horsepower (220 kW) Boeing 502 turbine for more power when travelling at higher speed or in severe terrain. The turbine was quickly found to be underpowered, and was replaced by a Caterpillar turbine delivering 490 horsepower (370 kW) after no more than 70 tanks had been produced, and retrofitted to all previous vehicles. This was the first use of a turbine engine in a production tank; the Soviet T-80 and US M1 Abrams would later be built with gas turbines for main propulsion. The concept was interesting enough that Bofors was asked to build a prototype of the suspension/drive train, which they completed successfully.

The Strv 103 could be made fully amphibious. A flotation screen could be erected around the upper hull in about 20 minutes, and the tracks would drive the tank at about 6 kilometres per hour (3.7 mph) in water.[citation needed]

One tank in each platoon was fitted with a dozer blade under the front hull, which was from outside the tank manually dropped and locked into working position with pins and support struts. The blade allowed it to do simple engineering tasks, like digging fire pits for the platoon, filling trenches for ease of passage and so forth. Once the task was completed, the blade was again manually returned to the position under the front hull and locked in place. Upon the introduction of the 103C model all tanks had a bulldozer blade fitted, both to speed up operations and for the increased protection of the lower hull.

Service

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The Strv 103 demonstrating its amphibious capabilities with the help of flotation screens.

In preparation for the defence plan of 1958 (Försvarsbeslut 1958 (FB58)) in Riksdagen (Swedish parliament), the procurement set Alternativ S against the two foreign alternatives Alternativ A and Alternativ T. While the domestic alternative was going to be more expensive, the defence committee report recommended "S" when weighing in the symbolic value of a domestic tank for a neutral country as well as the spin-off effects on Swedish industrial competence.

Riksdagen made the formal decision regarding FB58 on 4 February 1958, and a follow-on contract called for two production prototypes, which were completed in 1961. By this point, the army was so satisfied with the design that an initial pre-production order for 10 was placed in 1960.[citation needed]

With minor changes, the Alternativ S was adopted as the Stridsvagn 103 ("103" from being the third tank with a 10 cm calibre gun accepted into Swedish service). Full production started in 1967 and ended in 1971 with 290 delivered. The changes included a new gyro-stabilised commander's cupola armed with a 7.62 mm KSP 58 machine gun, and upgraded frontal armour. A unique slat armor grid could be mounted at the front to help defeat high-explosive anti-tank (HEAT) rounds; however, it was kept secret for many years and was to be fitted only in the event of war.

Despite its design, the Strv 103 was intended for offensive operations. The armoured brigades of the Swedish Army, which operated the Strv 103, were designated anfallsbrigader (assault brigades) and tasked with launching counter-offensives on enemy beachheads and airborne landings.[12][13] The stated Swedish armoured doctrine contemporary to the tank describes an aggressive approach to armoured warfare, even in defensive situations.[14] The design of the Strv 103, with its low profile, was based on protection rather than defensive battlefield behaviour.[12]

In 1980, the Swedish Army requested all tanks in the inventory to be scrapped and replaced with an unspecified Stridsvagn 2000 (tank for usage past year 2000). In 1982, the Riksdag decided for severe reduction of the military budget in Defence Act of 1982, and instead decided the tank-fleet should go through a renovation and modification (REMO) to at least somewhat bring them up to standard while within the economic limits imposed.[15][16]

Performance

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The Stridsvagn 103 never saw combat and so its design remains unproven. However, for its intended role in the 1960s, it had numerous advantages. In 1967, Norway carried out a two-week comparative observation test with the Leopard 1 and found that, with closed hatches, the 103 spotted more targets and fired faster than the Leopard while the situation was reversed when operating with hatches open. In April to September 1968, two 103s were tested at the British armour school in Bovington, which reported that "the turretless concept of the "S"-tank holds considerable advantage over turreted tanks". In 1973, the BAOR tested the 103. British crewmen received six weeks training and the vehicles were serviced by Swedish engineers. Over nine days of manoeuvres alongside the Chieftain tank, availability never fell under 90% and the final report stated, "It has not been possible to prove any disadvantage in the "S" inability to fire on the move."[17] In 1975, two 103s were tested at the American armour center at Fort Knox. The trial demonstrated that the 103 fired more accurately than the M60A1E3, but on an average of 0.5 seconds slower.[citation needed] In the late 90s, a wargame was held in Kvarn pitting 7 Strv 103s in a defensive position against an equal amount of Strv 121s (Leopard 2). All seven Strv 121s were knocked out while only one 103 was lost.[11]

In comparison with the Centurion, the shorter track of the Strv 103 meant it performed worse on soft ground (mud and snow), and its trench taking and vertical obstacle capabilities were also significantly lower: where the Centurion climbed a 100 cm wall, the 103 was barely able to climb an 80 cm wall. On hard terrain, the 103 on the other hand was far more manoeuvrable.[18]

Variants

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Strv 103C at the Swedish Army Museum, Stockholm, with anti-HEAT slat armor on the front
Stridsvagn 103B
As the weight of the Strv 103 had increased compared to the pre-production tanks, the 103 turned out to be under-powered. Hence, a more powerful version of the same gas turbine, manufactured by Caterpillar, was introduced after the first production run of 80 tanks. The early version tanks (retroactively designated Strv 103A) were soon upgraded to B-standard. Adjustments to the hydro-pneumatic suspension increased elevation range from −10 through +12 degrees, to −11 through +16 degrees.[19]
Stridsvagn 103C
An upgrade programme was started in 1986 to fit all vehicles with improved fire control systems. Also, each Strv 103 was fitted with a dozer blade, rather than just one per platoon. A further upgrade in 1987/88 replaced the Rolls-Royce engine with a newer 290 horsepower (220 kW) Detroit Diesel with more fuel cans placed along the sides to function as applique armour, and added a new laser rangefinder.
The proposed Strv 103D upgrade
Stridsvagn 103D
In the mid-1990s, as the Swedish Armed Forces were looking for a new main battle tank, one Strv 103C was upgraded into the Strv 103D. The major changes were the installation of fire-control computer, thermal viewers for both the gunner and the commander, allowing the crew to fight at night-time and in bad weather conditions, and the installation of passive light enhancers for driving. Some minor changes to the suspension system and engine were also made. There was some consideration of adding both reactive and/or appliqué armour in the early 1990s, but, in the end, the Strv 103 was instead phased out of Swedish service in favour of the Stridsvagn 121 (leased Leopard 2A4s were used as a stop-gap measure), which entered service in 1997 (the last year that the Strv 103 was used to train tank crews).[11] This prototype was used during the trials for the new main battle tank system for the Swedish Armed Forces alongside all the other tanks tested. For a few years this prototype was even tested under remote control. The sole Strv 103D is today on display at the Arsenalen national military vehicle museum,[20] together with some 103C models. They are all still in running order.
MV 103C Deminer.
Minvält 103C
The MV 103C Deminer was a minesweeper vehicle based on the 103C tank. The project was discontinued in 1997.
15,5 cm bandkanon 1
Self-propelled howitzer developed from Strv 103 chassis.

Tanks on display

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The following exhibitions possess an S-tank on display:

Sweden:

Denmark:

  • Aalborg Forsvars- og Garnisonmuseum

Germany:

UK:

Australia:

France:

Russia:

Belgium:

  • Gunfire Museum, Brasschaat

See also

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Tanks of comparable role, performance and era

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References

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Sources

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Stridsvagn 103

View on Grokipedia
from Grokipedia
The Stridsvagn 103 (Strv 103), also known as the S-tank, is a Swedish main battle tank developed in the late 1950s and early 1960s as a response to the need for a domestically produced armored vehicle suited to Sweden's defensive doctrine of armed neutrality. Featuring a revolutionary turretless design, the Strv 103 elevates its fixed 105 mm L74 smoothbore gun using the vehicle's hydropneumatic suspension system while traversing the weapon by maneuvering the entire chassis, which minimized crew requirements to three members and enhanced its low-profile silhouette for hull-down engagements in varied terrain. Production spanned from 1967 to 1971, yielding 290 units equipped initially with a combination diesel-gas turbine powerplant, including the Boeing 553 turbine for rapid acceleration, though later upgrades shifted to more conventional diesel configurations. The tank incorporated an automatic loader for sustained fire rates and multiple driving positions for operational flexibility, reflecting first-principles engineering focused on mechanical reliability over conventional turret mechanisms. Serving exclusively with the Swedish Army until its retirement in 1997 without seeing combat, the Strv 103 exemplified causal trade-offs in tank design—sacrificing traditional mobility for superior concealment and simplicity—yet faced criticism for limitations in dynamic offensive scenarios, prompting eventual replacement by the Leopard 2. Despite debates over its classification as a true main battle tank rather than a specialized defensive vehicle, empirical assessments affirm its effectiveness within Sweden's geographic and strategic context.

Development History

Origins and Concept Development

The , pursuing a doctrine of armed neutrality amid tensions, sought in the mid-1950s to develop a domestically produced capable of countering potential invasions through defensive positioning and rapid counterattacks. This effort addressed the obsolescence of earlier models like the Strv 74, emphasizing strategic mobility across Sweden's terrain of forests, hills, and coastal plains, where low-profile vehicles could exploit hull-down positions for ambush tactics. In 1956, Sven Berge patented a novel turretless design, mounting the main gun directly in the hull to achieve a minimal —reducing height to under 2 meters in firing position—while incorporating sloped frontal armor equivalent to heavier tanks for enhanced protection against kinetic penetrators. A study formalized requirements for a 30-ton with superior , speed exceeding 50 km/h, and armor sufficient for frontal engagements, targeting 200 units by 1965 for integration into armored brigades tasked with offensive strikes against enemy beachheads in vulnerable areas like Skåne and . The concept rejected traditional turrets to prioritize first-shot accuracy via vehicle maneuvering and for elevation adjustment, aligning with a -focused over maneuverability in open battles. The 1958 Defence Act endorsed this innovative approach, commissioning to refine Berge's hull-integrated gun system, which aimed the 105 mm weapon by pivoting the entire 37-ton rather than rotating a , thereby simplifying mechanics and improving stability for precision fire in defensive counteroffensives. Early concepts balanced offensive capability—enabling brigade-level maneuvers—with survivability features like external storage to mitigate risks, reflecting Sweden's emphasis on self-reliant production free from foreign supply dependencies. This design philosophy, driven by geographic and neutrality imperatives, positioned the Stridsvagn 103 as a specialized rather than a , intended for active combat roles despite its fixed armament.

Prototyping and Alternative Designs

In the mid-1950s, the Swedish Armoured Forces initiated studies for a next-generation to replace aging Centurions, evaluating both domestic and foreign options amid concerns over escalating costs and technological dependencies. By late August 1956, engineer Sven Berge proposed the "Alternative S" concept, a turretless emphasizing a low silhouette for enhanced survivability in defensive terrain, drawing on to enable hull-based gun stabilization rather than a rotating turret. This approach addressed limitations in prior Swedish projects like the turreted EMIL and Kranvagn prototypes, which had been abandoned by 1956 due to unresolved armament integration and weight issues exceeding 40 tons. By spring 1957, three competing domestic designs were formalized under committee review: the Strv A, a heavier turreted configuration weighing 42.5 tons akin to contemporary M60-style tanks with thicker armor but slower mobility; the Strv T, a lighter 32.5-ton turreted option modeled on or principles, prioritizing speed at 25-30 hp/ton with thinner 75 mm armor; and the Strv S, the turretless Alternative S variant targeting 30 tons for superior and reduced target profile through sloped armor. The Strv S was selected over the others for its balance of protection—achieved via a flatter hull vulnerable primarily from above—and operational flexibility in Sweden's forested and hilly , where turret traverse limitations could be mitigated by rapid hull maneuvering and . Foreign alternatives, including the British Chieftain, were evaluated but rejected to maintain indigenous production and avoid export restrictions on sensitive technologies. Prototyping commenced in 1958 with Bofors contracted to develop the Strv S's hydropneumatic suspension and drivetrain, yielding a successful test rig that validated hull stabilization for accurate fire on the move. Initial crew configuration shifted from two to three personnel by March 1959 to handle targeting and maintenance demands, incorporating a fixed 105 mm gun elevated via wheels and an autoloader. Two experimental prototypes, designated Strv S1 and S2 (also Bofors VK 105 X 59), were completed and trialed in 1961, focusing on gun stabilization efficacy and reverse-speed capabilities exceeding 50 km/h for tactical repositioning. These tests confirmed the design's viability, leading to an order for 10 pre-production "zeroth series" vehicles (Strv 103-0 or Bofors VK 105 S 60) in 1960, with the first delivered on October 1, 1963, after refinements to the Boeing 553 turbine engine integration and suspension controls. A parallel proposal, Strv K, combining a KRV chassis with a Centurion Mk.10 turret armed with the British L7 105 mm gun, was advanced on March 23, 1959, but canceled following Sweden's acquisition of surplus Centurions as an interim solution, redirecting resources to the Strv S lineage. By 1962, trials affirmed the turretless configuration's advantages in direct-fire roles within armored brigades, culminating in full production approval in 1965 despite debates over its offensive limitations compared to turreted peers.

Production Entry and Early Variants

Following successful trials of pre-production vehicles delivered in 1963, the Swedish Army placed an initial production order for the Stridsvagn 103 in 1964, marking the transition to full-scale manufacturing led by AB Bofors. The first production batch consisted of 70 units designated Strv 103A, with deliveries commencing in 1967 after completion of the initial vehicles in 1966. These early Strv 103A tanks entered service with the Swedish Army in September 1967, primarily equipping Panzerregementer P 2 and P 5. The Strv 103A featured a combined powerpack with a 300 hp GT 502-10 gas turbine for high-speed operation and a supplementary , achieving a top speed of 50 km/h on roads, though it lacked amphibious fording equipment such as flotation screens or dozer blades. Weighing approximately 37 tons, the initial variant prioritized the core turretless design with fixed 105 mm gun and for hull-down positioning, but its was later deemed insufficient for evolving requirements. Subsequent production shifted to the improved Strv 103B variant starting in , with 220 units built to address shortcomings in the early models. The Strv 103B incorporated a more powerful 490 hp 553 gas turbine, enhancing mobility to 18.4 hp/ton, and added fording gear including flotation screens, which were retrofitted to existing Strv 103A tanks. Overall production of the Strv 103 series totaled 290 units by 1971, with early variants forming the backbone of 's armored forces during initial deployment.

Technical Design

Armament and Fire Control Systems

The primary armament of the Stridsvagn 103 consisted of a single 105 mm L74 rifled gun, a Bofors-developed weapon 62 calibers in length and derived from the British Royal Ordnance L7 tank gun. This low-pressure variant featured a bore evacuator but omitted a muzzle brake to reduce the tank's silhouette and noise signature, with the gun fixed rigidly to the hull and capable of storing 50 rounds of ammunition including armor-piercing discarding sabot (APDS), high-explosive anti-tank (HEAT), and high-explosive squash head (HESH) projectiles. A hydraulic autoloader enabled a maximum rate of fire approaching 10 rounds per minute, though practical rates were lower due to the need to halt for accurate aiming. Secondary armament included two fixed 7.62 mm KSP 58 general-purpose machine guns—one coaxial to the main gun and another forward-firing—and a pintle-mounted 7.62 mm KSP 58 on the commander's cupola for anti-aircraft defense. The absence of a rotating turret necessitated hull traversal for horizontal aiming across a full 360 degrees, while vertical elevation from +12° to -10° was achieved by adjusting the hydropneumatic suspension system rather than elevating the gun barrel itself. This design eliminated the need for gun stabilization but precluded accurate fire on the move, requiring the vehicle to stop and settle for precise targeting. Early Strv 103A models relied on basic optical sights for the gunner and , with manual rangefinding via stereoscopic or methods integrated into periscopes. The Strv 103B introduced a Simrad in the gunner's sight, enhancing first-hit probability at range, alongside infrared night vision equipment. Further upgrades in the Strv 103C, implemented from 1986, incorporated refined fire control computers and stabilized optics, allowing the to independently search and designate targets while the gunner refined aim using integrated ballistic solutions. Despite these advancements, the system's effectiveness remained tied to the low profile and defensive doctrine, prioritizing hull-down positions over dynamic engagements.

Armor Protection and Defensive Features

The Stridsvagn 103's armor consisted of welded and cast plates with a maximum thickness , prioritizing mobility and low over heavy protection. The upper frontal plate was steeply angled at approximately 80 degrees, yielding an effective thickness against rounds several times the nominal value, sufficient to resist armor-piercing ammunition from mid-20th-century threats like the Soviet 100 D-10T gun. Side and rear armor remained thin at 20-30 , vulnerable to flanking , reflecting the tank's design philosophy of avoiding prolonged engagements through superior first-strike capability and terrain exploitation. In the Strv 103C upgrade introduced in the late , additional 10 mm plates were added to the frontal hull and commander's , increasing protection against both kinetic and threats. A deployable screen, consisting of vertical bars spaced to disrupt shaped-charge jets, was fitted over the for enhanced defense against rounds; this feature was kept classified during development. These modifications raised the combat weight to 42.5 tons while maintaining the core reliance on passive measures rather than escalating armor mass. Defensive features centered on the tank's unprecedented low profile, with an overall of 2.14 meters in the traveling position, minimizing target exposure compared to turreted contemporaries like the at 3 meters. The system allowed the hull to adjust from 1.8 to 2.6 meters, enabling rapid assumption of hull-down postures where only the gun and minimal protruded, reducing vulnerability in defensive terrain like Swedish forests and hills. Later variants incorporated a fixed dozer blade for self-entrenchment, permitting the to excavate cover in under a minute, further integrating mobility with site-specific fortification. Nuclear, biological, and chemical systems were retrofitted in the 103C, providing crew protection against contaminated environments without compromising the low-observability design.

Mobility, Powertrain, and Suspension

The Stridsvagn 103 employed a dual-engine combining a diesel for low-speed cruising and a gas turbine for high-speed acceleration, mated to an hydrostatic transmission with two forward and two reverse speeds. In the Strv 103A variant, propulsion derived from a Rolls-Royce K60 opposed-piston producing 240 horsepower alongside a GT502 gas turbine delivering 300 horsepower, yielding a combined output sufficient for the 37- vehicle's operational demands. The Strv 103B upgraded the turbine to a 553 unit rated at 490 horsepower while retaining the K60 diesel, enhancing to approximately 18.4 horsepower per and incorporating equipment for fording depths up to 4 meters. The Strv 103C further refined the system by replacing the K60 with a Detroit Diesel 6V-53T engine of 290 horsepower, paired with the Caterpillar 553 turbine, to improve reliability and fuel efficiency amid 1980s renovations. The front-mounted powerpack, including engine and transmission, facilitated relatively quick field replacement, though requiring removal of the glacis plate and main armament, typically completed in about four hours. The vehicle's system, a key innovation, utilized nitrogen-charged accumulators and hydraulic rams at each road wheel station—four dual rubber-tyred wheels per side, with the first and last on oscillating arms—to enable active control of hull attitude. This allowed precise tilting for main (up to +12 degrees by raising the front) and depression (down to -10 degrees by lowering the rear), compensating for the fixed-gun design while providing superior ride quality over rough terrain compared to contemporary torsion-bar systems. The suspension could lower the hull by an additional 12.7 cm for reduced in defensive positions or raise it for obstacle clearance, contributing to effective hull-down operations. Mobility characteristics included a governed road speed of 50 km/h, with operational range of 300 km on internal fuel tanks, supported by the powertrain's multi-fuel capability. Cross-country benefited from the adjustable suspension, enabling consistent speeds over uneven ground, while amphibious capability required 20-25 minutes for screen deployment and achieved 6 km/h in water using track propulsion. Overall power-to-weight ratios varied from 13 to 18 horsepower per across variants, balancing the tank's 37- to 42- combat weight with adequate agility for 's forested and hilly terrain doctrine.

Crew Layout and Operational Controls

The Stridsvagn 103 operated with a of three personnel: /gunner seated forward on the side, the positioned forward starboard, and a rear-facing who also served as the reverse driver. The /gunner managed primary forward mobility via steering controls integrated with the hull's system, while simultaneously laying the main gun in by pointing the entire vehicle; and depression were achieved through the system, which adjusted the hull's rear attitude independently of movement. The maintained situational awareness via periscopes and optics, operated the 360-degree coaxial , handled radio communications, and could override the /gunner's controls for aiming and firing if needed. The rear crew member, equipped with dedicated periscopes and a hatch for rearward visibility, assumed full driving controls when reversing, enabling sustained high-speed retreats up to 50 km/h—equivalent to forward road speeds—thanks to the transmission's symmetric forward and reverse gear ratios. This duplicated control setup across all three positions allowed any crew member to assume driving duties, with the powertrain capable of 180-degree rotation to facilitate reverse propulsion without altering crew orientation. The automatic loader, positioned centrally, handled 105 mm ammunition cycling without a dedicated loader role, reducing crew size while maintaining a firing rate of approximately 10 rounds per minute. Fire control integrated optical rangefinders and ballistic computers accessible to the driver/gunner and commander, emphasizing rapid engagement from hull-down positions where the suspension could lower the profile to under 0.4 meters. Operational prioritized defensive maneuvers, with controls optimized for quick repositioning into cover; the rear driver's setup mitigated visibility limitations during retreats, and all positions included egress hatches to enhance . Crew height restrictions—typically under 1.8 meters—were enforced to fit the low interior, ensuring compatibility with the tank's compact design for forested Swedish terrain. This arrangement reflected empirical testing prioritizing multi-role flexibility over traditional turreted layouts, though it demanded high crew coordination for effective gunnery during dynamic movement.

Operational Service

Deployment and Training in Swedish Forces

The Stridsvagn 103 entered service with the in 1967 as the Strv 103A variant, with subsequent production of Strv 103B and Strv 103C models continuing until 1971, yielding a total of around 300 vehicles that equipped armored brigades alongside tanks. These tanks were organized into tank companies within seven armored brigades by the , emphasizing defensive operations suited to 's , including tactics where units would engage from hull-down positions before relocating rapidly. Deployment focused on independent tank battalions and integrated mechanized formations, with the vehicle's low silhouette and enabling effective use in forested and hilly southern for territorial defense against potential invasion. Training for Strv 103 crews occurred primarily at the Swedish Armoured Forces School and Revingehed training area, adapting to the tank's turretless design where the driver served as primary gunner, utilizing track counter-rotation for traverse and suspension adjustment for elevation. Gunnery drills enforced rigorous standards, mandating a maximum laying error of 0.2 mils against stationary targets and 0.4-0.8 mils for moving ones, with crews required to score at least 39 points across 20 simulated rounds to pass. Early field exercises, such as those at Ravlunda in 1966 with prototypes and Klagstorp in the same year, tested integration with infantry and mobility in varied terrain, while later drills at Revingehed in the 1970s emphasized hull-down firing and rapid repositioning. Crew proficiency relied on simulator-based preparation followed by live-fire validation, accounting for the fixed gun's demands on coordinated driver-gunner actions during maneuvers. The system remained in active training use through the 1980s, supporting Sweden's neutral defense doctrine until progressive replacement by Leopard 2 tanks in the 1990s.

In-Service Modernizations and Upgrades

The Strv 103 underwent progressive modernizations during its to enhance performance, reliability, and . upgrades focused on the and mobility features. In the early , all Strv 103A tanks were retrofitted to Strv 103B standard, which included increasing the auxiliary gas turbine output from 300 hp to 490 hp for improved acceleration and . This variant also standardized the flotation screens, enabling limited amphibious operations with a top water speed of approximately 8 km/h, and integrated a dozer blade under the plate for hull-down positions and obstacle clearance, features previously optional or absent on early models. The major Renovation and Modification (REMO) program, conducted between 1986 and 1989, converted the fleet to Strv 103C configuration on 290 tanks. Key changes replaced the original Rolls-Royce K60 main (240 hp) with a Detroit Diesel 6V-53T unit producing 290 hp, coupled with a modernized transmission for better reliability and . The fire control system received a significant overhaul, incorporating a SIMRAD Nd:YAG , digital ballistic computer, and passive equipment, improving first-hit probability and engagement in low-visibility conditions. Additional in-service enhancements addressed vulnerabilities and engineering roles. In 1989, mine-clearing rollers were fitted to select vehicles, adding about 6 tonnes of equipment for route preparation. By 1992, an armor array consisting of 32 steel bars was installed on the glacis plate of surviving tanks, providing equivalent protection of up to 690 mm against shaped-charge rounds and enhanced resistance to kinetic penetrators. These upgrades extended operational viability into the 1990s, though the tank's fixed-gun design limited further adaptations compared to turreted contemporaries. A proposed MV 103C deminer variant based on the 103C reached stage but was abandoned in 1997 without entering service.

Retirement and Strategic Replacement

The Stridsvagn 103 was progressively phased out of service during the 1990s, with final retirement from active frontline units occurring in 1997 after three decades of operation. A total of 302 vehicles had been produced across variants, but maintenance demands and evolving operational requirements prompted the transition, leaving no Strv 103 in combat-ready status by the late 1990s. Replacement efforts began in 1994 when Sweden acquired 160 main battle tanks through a lease-purchase agreement with , designated as Strv 121; these were intended to supplant both the Strv 103 and the concurrently retiring Strv 104 tanks. Deliveries commenced that year, providing an interim conventional turreted capability with improved firepower, protection, and mobility suited to broader tactical maneuvers. Subsequently, Sweden ordered 120 Strv 122 tanks, a domestically modified variant incorporating enhanced armor, fire control systems, and cold-weather adaptations based on the Leopard 2A5 prototype; initial units were delivered to the in December 1996, entering full service by 1997-1998. This procurement marked a doctrinal pivot from the Strv 103's specialized defensive posture to versatile main battle tanks emphasizing offensive potential and rapid target engagement without reliance on whole-vehicle pivoting. The strategic rationale for decommissioning centered on the Strv 103's inherent design constraints becoming liabilities amid post-Cold War threat assessments and technological shifts, including advancements in enemy gun ranges and precision optics that eroded the tank's low-silhouette advantages in hull-down positions. The fixed-gun configuration, while efficient for static, terrain-exploitative defense aligned with Sweden's neutral deterrence , limited responsiveness in fluid engagements requiring independent turret traverse for anti-infantry, flanking, or urban scenarios. Acquisition of Leopard-series tanks enabled integration of standardized NATO-compatible systems, enhanced crew , and superior all-aspect protection, reflecting empirical evaluations that prioritized adaptability over the Strv 103's niche engineering efficiencies in a less predictable security environment.

Performance Evaluation

Engineering Strengths and Empirical Advantages

The Stridsvagn 103's turretless design and low silhouette, with a of 2.13 meters in the travel position, minimized its exposure during engagements, particularly in hull-down configurations where only the commander's protruded above terrain. This choice enhanced by reducing the effective target area against enemy fire, aligning with Swedish defensive doctrine emphasizing and concealment in forested and hilly landscapes. The system provided adjustable ground clearance and tilt control, enabling depression up to -10 degrees and elevation to +6 degrees relative to the hull, which allowed the to fire over obstacles or from defilade positions without repositioning the entire . This feature compensated for the fixed by integrating movement with aiming, yielding a first-shot hit probability of 70% at typical combat ranges, surpassing the U.S. M48 Patton's performance in comparative studies. The automatic loader for the 105 mm L/62 gun supported a sustained exceeding 10 rounds per minute while reducing crew size to three members, eliminating the need for a dedicated loader and improving operational efficiency under stress. Combined with commander override capabilities in the , this setup facilitated rapid and engagement without stabilization penalties, as confirmed by 1961 evaluations showing no inherent accuracy deficit against stabilized turreted designs. Powertrain innovations included the Strv 103A's hybrid setup of a 240 hp Rolls-Royce K60 diesel engine augmented by a 240 hp GT502 gas turbine for bursts up to 50 km/h, providing compact high-power output suitable for quick maneuvers in restrictive terrain. The sloped frontal armor, unburdened by turret ring stresses, achieved effective protection against 1960s-era kinetic penetrators, further bolstered by a later-added standoff screen against shaped-charge warheads. These attributes collectively enabled the Strv 103 to excel in tactics, leveraging empirical advantages in concealment and responsiveness over heavier, higher-profile contemporaries.

Tactical Limitations and Criticisms

The Stridsvagn 103's turretless configuration necessitated traversing the entire hull to aim its 105 mm L74 , resulting in slower times compared to turreted main battle tanks, which could independently rotate their armament while maintaining hull stability. This compelled the to halt and pivot on its tracks for precise alignment, with hull traverse speeds reaching approximately 20° per second but requiring stabilization pauses that extended engagement cycles. A primary tactical drawback was the inability to deliver accurate fire while moving, as vehicle motion disrupted the gun's stabilization and sighting systems, limiting effective to stationary or very low-speed ambushes. This constraint aligned with Sweden's defensive doctrine of armed neutrality, emphasizing concealed positions in forested or open terrain for initial strikes against invaders, but rendered the suboptimal for fluid offensive maneuvers where sustained mobility and rapid reorientation are critical. analysts have noted that during potential counterattacks, the Strv 103 could be outflanked by more agile adversaries, as repeated hull pivots exposed thinner side armor (20-40 mm effective) and increased vulnerability to anti-tank weapons. Gun elevation and depression further compounded operational inflexibility, with the fixed armament providing a baseline of +6° and -6° depression, augmented by the to achieve up to +12° and -10° depression through hydraulic adjustments that took 2-4 seconds to execute. While effective for hull-down engagements in Sweden's predominantly flat landscapes, the system's reliance on and suspension reconfiguration proved limiting in reverse-slope defenses or hilly areas, where rapid depression changes were needed to engage targets below the hull line without excessive exposure. Suspension lockout for cross-country speeds over 30 km/h also precluded on-the-fly adjustments, forcing crews to prioritize either mobility or firing posture. Critics, including post-service evaluations by Swedish military planners, highlighted the tank's specialization for static defense, which curtailed its versatility against evolving threats like helicopter-borne assaults or offensives by the late era. The absence of combat validation—Sweden retired the Strv 103 in 1997 without operational deployment—left these limitations inferred from exercises and simulations, where the design's low profile (2.23 m height) offered ambush advantages but at the cost of adaptability in dynamic battlefields.

Comparative Role Against Contemporary Tanks

The Stridsvagn 103 was optimized for Sweden's defensive doctrine against a potential Warsaw Pact invasion, prioritizing ambush tactics in forested and rocky terrain over maneuver warfare typical of NATO contemporaries like the M60 Patton and Leopard 1. Its turretless design and adjustable hydropneumatic suspension enabled rapid assumption of hull-down positions, minimizing exposure compared to turreted tanks that required elevating the gun and superstructure to engage targets. This configuration enhanced first-shot survivability in static defenses, where the Strv 103's low silhouette—standing just 2.23 meters tall—reduced detection and hit probability against Soviet T-55 and T-62 tanks, which averaged 2.4 meters in height. Firepower-wise, the Strv 103's 105 mm L/74 , an indigenous development with a longer barrel than the L/52 on the M60 and , achieved higher muzzle velocities for improved penetration against armor at ranges up to 2,000 meters. Using APDS rounds, it could reliably defeat the frontal of T-55/62 models, aligning with Swedish gunnery emphasizing high first-hit rates against numerically superior foes. However, the fixed limited traverse to hull pivoting, constraining reactive engagements versus the 360-degree flexibility of peers like the Chieftain or , which could maintain aim while repositioning. In protection, the Strv 103's 37-tonne weight yielded thinner base armor than the 50-tonne M60 (up to 120 mm frontal) or even the mobility-focused (70 mm sloped), relying instead on sloping for equivalent effective thickness against kinetic threats but vulnerability to chemical rounds. Against Soviet 100 mm and 115 mm guns, its low profile and terrain integration offered practical advantages in defensive roles, though later trials in the revealed limitations against upgraded threats without add-on protections. Mobility comparisons highlighted the Strv 103's 553 gas turbine, providing rapid acceleration (0-30 km/h in seconds) superior to diesel-powered contemporaries, suited for quick repositioning in Sweden's varied but at the cost of high fuel consumption versus the efficient MTU engine in the Leopard 1. Tactically, while excelling in prepared positions against massed T-series assaults, the Strv 103's design proved less adaptable to offensive or urban scenarios compared to versatile MBTs, reflecting Sweden's neutrality-driven focus on attrition over expeditionary operations.

Preservation and Legacy

Surviving Examples and Museum Displays

Over 20 Stridsvagn 103 tanks are known to survive as of 2021, with the majority preserved in Sweden and others displayed in international museums following export evaluations or trials. These include early prototypes, production Strv 103A/B models, upgraded Strv 103C variants, and the sole Strv 103D prototype equipped with passive night vision. In , the Arsenalen Tank Museum in maintains the largest collection, featuring multiple Strv 103C vehicles (serials 202324, 202364, 202370, 202253) and the unique Strv 103D prototype (serial 202248). The in exhibits a Strv 103C (serial 202340) outside its facilities. Additional Swedish sites include the Försvarsmuseum Boden with two Strv 103C examples (serials 202280 and 202322, the latter fitted with a roller) and the Hässleholms Museum displaying a Strv 103C (serial 202372). Internationally, at Bovington, , preserves a Strv 103C (serial 202231) in its collection. in holds an early 0-serie Strv 103 (serial 12), while in , , displays another 0-serie example (serial 20). In the , the Virginia Museum of Military Vehicles in Nokesville houses two Strv 103C tanks (serials 202367 and 202359), and the Patton Museum at exhibits one (serial 202351). Other displays exist in at the Royal Australian Armoured Corps Museum (serial 202327), Denmark's Defence and Garrison Museum (serial 202137), and Germany's Panzer Museum (serial 202155).
MuseumLocationVariant(s)Serial Number(s)
Arsenalen Tank MuseumSträngnäs, Strv 103C, Strv 103D202324, 202364, 202370, 202253, 202248
Tank Museum BovingtonBovington, Strv 103C202231
Kubinka, RussiaStrv 103 (0-serie)12
Saumur, FranceStrv 103 (0-serie)20
Virginia Museum of Military VehiclesNokesville, VA, USAStrv 103C202367, 202359
Many preserved examples remain operational for demonstrations, reflecting ongoing interest in the Strv 103's innovative despite its retirement from Swedish service in 1997–2003.

Restorations, Demonstrations, and Modern Interest

Several Stridsvagn 103 tanks have been preserved in running condition at Swedish military museums, allowing for operational demonstrations of their unique features. At Arsenalen, Sweden's national defense vehicle museum, multiple Strv 103C variants and the sole Strv 103D are maintained in functional state, enabling public displays of the hydro-pneumatic suspension that permits extreme and depression angles. These examples underwent to restore mobility and after retirement from active service in 1997, with the museum's curators periodically operating them to showcase capabilities like hull-down positioning and combined engine performance. Demonstrations at Arsenalen highlight the tank's engineering, including live runs of the suspension adjusting to simulate terrain adaptation and firing mechanisms, drawing visitors interested in Cold War armored innovations. Similar operational showcases occur at events like those at Revingehed training area, where preserved Strv 103s perform maneuvers to illustrate tactical mobility in 2022. No widespread private restorations to running condition are documented, though static displays exist at sites such as the . Modern interest in the Strv 103 stems from its unconventional design and autoloading 105 mm gun, prompting analyses of its relevance to contemporary defensive doctrines emphasizing low profiles and . Military history publications and simulations feature the tank for its empirical advantages in neutral terrain warfare, though no official upgrade programs have revived production. Enthusiast communities discuss hypothetical modernizations, such as integrating advanced sensors, but these remain speculative without empirical development.

References

  1. https://www.tankarchives.com/2017/02/the-amazing-strv-103.html
  2. https://tank-afv.com/coldwar/Sweden/Stridsvagn-103.php
  3. https://www.militaryfactory.com/armor/detail.php?armor_id=104
  4. https://www.hhogman.se/tanks-4-swe.htm
  5. https://www.globalsecurity.org/military/world/europe/strv-103.htm
  6. https://tanks.mod16.org/2016/08/19/stridsvagn-103-was-not-a-tank-destroyer/
  7. https://www.popularmechanics.com/military/weapons/a20273/sweden-s-tank-no-turret-design/
  8. https://www.secretprojects.co.uk/threads/s-tank-development.20632/
  9. https://russellphillips.uk/nonwp/reccemission/S-Tank.pdf
  10. http://www.army-guide.com/eng/product1804.html
  11. http://www.theworldwars.net/weapons/entry.php?b=land&m=strv103
  12. https://www.forecastinternational.com/archive/disp_old_pdf.cfm?ARC_ID=1182
  13. https://wiki.wargaming.net/en/Tank:S11_Strv_103B
  14. https://wiki.warthunder.com/3811-full-history-of-the-stridsvagn-103-the-swedish-doorstop-mbt
  15. https://www.youtube.com/watch?v=qvI6tqj6obA
  16. https://www.reddit.com/r/AskHistorians/comments/4fj5ow/what_factors_led_to_the_design_and_deployment_of/
  17. https://tanks.mod16.org/2015/04/02/report-from-british-strv-103-trials-at-the-baor-1973/
  18. https://tanks.mod16.org/tag/strv-103/
  19. https://tanks.mod16.org/2015/10/12/stridsvagn-103-0-series-ravlunda-1966/
  20. https://www.ipmsstockholm.se/home/strv-121-in-detail/
  21. https://old-wiki.warthunder.com/Strv_121
  22. https://www.globalsecurity.org/military/world/europe/strv-121.htm
  23. https://www.reddit.com/r/WarCollege/comments/1195k0d/can_the_swedish_stank_be_considered_a_failure_as/
  24. https://www.quora.com/Why-didnt-Sweden-simply-upgrade-its-S-Tanks-with-bigger-main-guns-120mm-and-with-updated-computer-systems
  25. https://tanks.mod16.org/2016/09/29/demonstration-of-the-elevation-system-on-the-strv-103/
  26. https://www.military-quotes.com/forums/threads/stridsvagan-103-s-tank-do-you-think-it-would-of-been-good-in-battle.79962/
  27. https://www.facebook.com/photo.php?fbid=1158421352969211&id=100064040714883&set=a.677199514424733
  28. http://the.shadock.free.fr/Surviving_Strv_103.pdf
  29. https://preservedtanks.com/Profile.aspx?UniqueId=2127
  30. https://www.[youtube](/page/YouTube).com/watch?v=4RVbqyz2lk4
  31. https://www.[youtube](/page/YouTube).com/watch?v=i0yLpP2LQwE
  32. https://www.youtube.com/watch?v=cYKanhuDK38
  33. https://www.youtube.com/watch?v=HA8XGj13MUc
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