Hello, this is my idea for a swedish tech tree. I know that the Swedish are supposed to be in the European tree but I think that they would manage one on their own.
Firstly I will show how the tree will look like and then I will tell you in detail about each tank.
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M21 Tier I
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Stridsvagn m/21 (Strv m/21) was a Swedish development on the German World War I tank prototype LK II.
It was powered by a sleeve valve type engine located in the front, the driver and crew been in the rear. The suspension and running gear was protected by armored skirts. Ten of these tanks were built and were armed with a single 6.5 mm machine gun
M31 Tier II
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Stridsvagn m/31 (Landsverk L-10) was a Swedish WWII era tank built by AB Landsverk. It was armed with a 37 mm Bofors gun and a light machine gun, and was equipped with 8-24 mm armor. Only three were built and, despite being highly advanced for the time when World War II broke out, they were dug in as static bunkers.
M37 Tier III
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The AH-IV was popular with Romania and Iran, and after a successful demonstration to Swedish authorities, during winter conditions in the Krkonoše Mountains, Sweden ordered 48 AH-IV-Sv in in 1937. Two of these were built in Czechoslovakia; the other 46 were built as the Strv m/37 under license by Jungner in Oskarshamn, with AB Volvo providing a more powerful engine, transmission, and tracks, the armor was made by Avesta. The ČKD supplied most of the other components after building one prototype. The tankette was strongly modified, including the suppression of original driver's machine gun, this variant was heavier and larger, than the AH-IV. On the turret, was placed two Swedish-made machine guns, the 8 mm Ksp m/36 strv and a commander cupola. Inside the vehicle was room for a radio and the ammunition. In November 1938, the final components were shipped.
M41 Tier IV
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In June 1941, 116 Stridsvagn m/41 SI were ordered. These were delivered from December 1942 - August 1943. The Stridsvagn m/41 was of rivetted construction which made manufacture easier. As with the preceding Strv m/38-Strv m/40, it was armed with a 37 mm Bofors m/38 gun, and the first batch had the same engine as the Strv m/40L, the Scania-Vabis type 1664.
In June 1942, a further 122 Stridsvagn m/41 were ordered under the designation Strv m/41 SII. These had thicker frontal armor and Scania's new type L 603 engine. The first SII vehicles were delivered in October 1943. The last 16 of the 122 ordered were rebuilt as assault guns (Sav m/43) and production of SII ceased in March 1944 after 106 vehicles had been delivered.
M42 Tier V
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The Strv m/42 had its origins on modifications in the Lago (the manufacturer designation) a 16 tons light tank armed with a 57 mm cannon and three machine guns produced for the Hungarian Army in late 1930s by the AB Landsverk, itself a development of the Stridsvagn L-60 light tank also made by the AB Landsverk. The Swedish Army specified for a bigger and better tank than the Lago resulting in the Strv m/42 (later known as Strv m/42 TM), a 22-ton tank armed with a 75mm L/34 gun, suited against armored and soft vehicles, it had similar performance as the German 7.5 cm StuK 37 L/24 gun. The gearbox of the m/42 TM wasn't working well and these tanks were built either as m/42 TH, or they got a new mechanical gearbox and became known m/42 TV.
IKV 73 tier VI
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All of Volvo engine except one were converted to IKV 73, which differs from strv m/42 through minor changes, mg to the right of the driver removed, a box of spare parts for the tracks are there instead. Centrally on the front is a cover-up headlights in a short tube with a lid. Right wheels on the tower were replaced by a cable reel for remote operation of the radio. Repainting to all green color, it was no longer fashionable to be dotted. This conversion was done approx 1957. The original "cat eyes" have been replaced with rectangular reflectors, a center-mounted headlights with position lamps on the sides have replaced both headlights. The small box with the fire extinguisher on the right fender removed and others minor changes.
Strv 74 Tier VII
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Stridsvagn 74 (strv 74) was a Swedish tank in use with the Swedish Army from 1958 to 1984. It was a modification of the older stridsvagn m/42 which was phased out of service in the 1950s. Instead of scrapping the vehicles altogether, the chassis were used to build a new tank which could be used as a supplement to the newly bought stridsvagn 101. The turret of strv 74 was completely new, with a 75 mm high-velocity gun based on an old anti-aircraft gun, engines and transmission were modified or changed from the strv m/42, broader tracks and a separate electrical engine for the turret rotation was introduced while retaining the manual control as a backup.
IKV 91 (Landsverk) Tier VIII
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This is the prototype that didn't get built, it have almost the same features as the Hägglund version except for the chassis layout.
First Line
IKV 91 (Hägglund) Tier IX
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The Ikv 91, or Infanterikanonvagn 91, was a high mobility tank destroyer that was developed to meet the operational requirements of the Swedish Army. It was designed and manufactured by Hägglund and Söner (now Hägglunds Vehicle AB) and employed common components with the Pbv 302 armoured personnel carrier series. The first prototypes of the Ikv 91 were completed in 1969 with production running from 1975 until 1978. The total numbers manufactured were 212.
In layout, the Ikv 91 resembled a large light tank. The main armament consisted of a Bofors 90 mm L/54 rifled low pressure gun, firing HEAT, armor-piercing and HE rounds, in a well sloped revolving turret which gave protection up to 25 mm calibre. This gun had an elevation of +15 degrees and depression of -10. In addition, the Ikv 91 was fitted with two 7.62 mm Browning machine guns; one in a coaxial mounting, and the second on a pintle attached to the commander's cupola. The machine guns were first used for a range firing but in later versions a laser is used; however the machine guns prove very useful against enemy infantry positions. Two 71 mm Lyran flare launchers were mounted on the turret along with a set of smoke dischargers (usually 12). The vehicle was equipped with a laser rangefinder, nightvision and a computerised fire-control system for increased first-round hit probability. The rate of fire was 8 rounds per minute and 59 rounds of 90 mm ammunition were carried internally. The tank can even fire while in water with the water taking most of the recoil. The turret itself has a small hatch which can be opened by the loader to eject used cartridge cases to prevent clutter in the tank.
KVR Tier X
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The data below for the construction of sept. 1951st
Armament discussed would be either:
10.5 cm grooved, relative length L 67 (strv 103, L 62 and 101 to 102, L 51) with the initial velocity Vo of 1080 m / sec. Underkalibrig am project was later added.
12cm serrated L 40 with RSV (shaped charge), rotation controlled by non-rotating sprängkon. Underkalibrig am project was possibly later added.
15 cm L 40 smoothbore cannon that shot RSV (shaped charge) with Vo 900 m / sec.
For all types predicted even explosive grenades and automatic loading. Two turret with armor piercing ammunition in one and exploded grenades in the other, varying on when you look at the proposals from 8-12 shots each. Firing rate of up to 40 rounds / min. The chassis was further ammunition carried to fill the trays. Secondary armament 2 x 8 mm mgs and a 12.7 mm . The first design proposal combat weight was about 28 tons, low chassis with plow-shaped front, which gives very good protection against fire. Wide strip and engine of 550 hp (100 of which is spent on cooling fans) would give a speed of 55 km / h Due to increased weight and demands the same ratio of engine power changed engine to 900 hp (200 to fans).
With 200 liters 75 octane petrol (standard at that time) in internal tanks and 350 liters in male caste tanks calculated a mileage of road was 160 km. Towers and armament was never implemented but two chassis were built. The project was halted with the purchase of strv 81 Centurion.
The front of the hull have a false welded joint about 10 cm in front to fool "spies". The real weld is hidden and shows about 25 cm thick frontal armor.
I was thinking about giving it the 120mm gun.
Second Line
Strv 81 Tier IX
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In the early 1950s, the Swedish army was looking for a new tank to replace Strv m/42 that have become outdated. Among others tested the French AMX-13 but the Supreme Commander, General Nils Swedlund, would rather have a tank with heavier armor to withstand the threat of tactical nuclear weapons. On 1 December 1952, the decision to buy Centurions was made. An order was placed on 80 tanks of model Centurion Mk III. The first carriages came to Sweden, May 2, 1953, which was five years earlier than planned. The tanks were delivered to the Scanian armored regiment under the symbol Strv 81st Numeral 81 indicates that it was the first tank with the caliber of 80 mm.
Strv 101 Tier X
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In 1958 it was decided to purchase 110 tanks of the type Centurion Mk X with 10.5 cm cannon. The Swedish name was Strv 101 as it was the first tank with a caliber of 100 mm
Strv L-60 Tier II
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Stridsvagn L-60 (Strv L-60), also known as Landsverk L-60, was a Swedish tank developed in 1934. It was developed by AB Landsverk as a light tank which included several design features later adopted by Germany and Russia in their tank designs.
The L-60 was progressively improved and four variants were created: L-60A, L-60B, L-60C (37mm gun), L-60D (new turret and 37mm gun and twin machine guns). The L-60 eventually evolved into the Stridsvagn m/38 and subsequent Stridsvagn m/39 and Stridsvagn m/40 and was adopted by the Swedish army as such.
Strv L-120 Tier III
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The Landsverk L-120 was a light tank designed in Sweden. One tank and one tank chassis was ordered for tests by the Swedish Army in 1936, and one chassis was ordered by the Norwegian Army the same year. The chassis sold to Norway became Norway's first ever tank, after an improvised turret and makeshift armour had been added.
Tank Destroyers
Pvkv M43 Tier IV
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Pansarvärnskanonvagn m/43 (Pvkv m/43)was a Swedish vehicles manufactured 1947-48. The wagons were built on the same chassis as Strv m/42 with fixed superstructure to fit a m/36 gun.
IKV 72 Tier V
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Infanterikanonvagn 72 (Ikv 72) was an armored vehicle developed by Landsverk and acquired a number of 36 pieces between 1952 and 1954. The purpose of the carriage was to give support with explosive shells to support the infantry brigades attack.
Ikv 72 fighting compartment had an open top in the front part while the engine and the gearbox was positioned in the rear. The drive took place at the rear wheels, which is unusual for Swedish armored vehicles. Running wheels were mounted in pairs on the wheel bars, which were suspended in pendulum arms torsion springs.
IKV 102/103 Tier VIII
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Between 1956 and 1958 the Ikv 72 was converted to Infanterikanonvagn 102 (Ikv 102). They mounted armored hatches that could cover the open battle room and switched the gun to a newly developed 10.5 cm piece from Bofors. The new armament was actually considered to be a howitzer, not a gun. It was initially used exclusively to shoot ordinary explosive grenades, but during the 1960s, the first half was purchased even armored explosive grenades with shaped charge to combat enemy armored vehicles.
Strv S prototype Tier IX
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The prototype which later became the Strv 103/S. This is my imagination, an option for this place is also IKV 103.
Strv 103 Tier X
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Stridsvagn 103 (Strv 103), also called S-Tank, is a Swedish tank that was abandoned 1997. The tank was developed in the late 1950s.
Strv 103 was developed for Swedish conditions and had no tower, resulting in a low profile, which was a clear advantage on defensive battles. The cannon was firmly mounted to the chassis, which meant that the vehicle was rotated to align the gun sideways. The carriage was using hydraulics to direct the cannon vertically. Opinions on whether Strv 103 was a success or a failure differ. However nominated Discovery Channel Tank 103C to the 6th best tank of all time.
KRV 150mm Tier X
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The KRV tank equipped with the 150mm gun.