Strv m/37 "The Swedish Tankette"

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The Strv m/37


History:

During the early 1930s, Swedish interest in armoured warfare increased after many years of limited investment. This shift culminated in the 1936 defence decision, where funds were finally allocated for the acquisition of modern tanks. Given the tight budget and the urgent need to build up capability quickly, Sweden focused on light, fast-moving tanks that could operate independently of rail transport and perform well in Nordic terrain.

As part of this effort, several foreign and domestic designs were evaluated. After trials, studies, and a European investigation tour, attention turned to Czechoslovakia and the firm Českomoravská-Kolben-Daněk (CKD). Their AH-IV light tank, already proven in foreign service, was considered robust, reliable, and suitable for rapid delivery. In July 1937, Sweden signed a contract with CKD to procure 48 machine-gun-armed tanks.

To meet Swedish requirements, the design was modified before production. The hull was lengthened, armour thickness slightly increased, and a Swedish-built Volvo petrol engine replaced the original powerplant. Armament consisted of two 8 mm Swedish-made m/36 tank machine guns. While CKD supplied two complete vehicles as prototypes, the remaining 46 tanks were shipped in parts and assembled at Jungner’s shipyard in Oskarshamn with assistance from Czech specialists. The finished vehicle was designated Stridsvagn m/37 in Swedish service.

Deliveries were completed in early 1939, later than originally planned. The Strv m/37 featured riveted armour, a well-designed transmission, and good suspension, giving it comparatively high speed and strong off-road performance for its class. Although lightly armed and cramped, it proved mechanically reliable and easy to drive.

Operational service began with the Göta Life Guards (I 2) in Stockholm. In 1939, the tanks were reassigned to infantry regiments in Skövde (I 9) and Strängnäs (I 10). When the Swedish Armoured Troops were formally established during the Second World War, all Strv m/37 tanks were transferred in 1943 to the Göta Armoured Life Guards company on Gotland (P 1 G). There they primarily served in reconnaissance and infantry support roles, particularly for coastal defence.

The Stridsvagn m/37 remained in service until 1953, when it was finally removed from Sweden’s wartime organisation. Several examples have survived and are preserved today in Swedish military museums, where they represent an important step in the development of Sweden’s armoured forces.


Specifications:

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  • Primary Armament: x2: “ksp m/36 strv” Chambered in: 8 × 63 mm

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  • Optional armament: x1 “Ksp m/36 Strv” Chambered in: 8 × 63 mm in a AA mount at the rear of the turret.

Should be noted IRL one Ksp m/36 Strv was removed from the turret housing and placed in the mount, but in war thunder the tank could mount an extra MG for added firepower against tanks and aircraft.

Ammunition:
– 8mm pprj m/39 (AP Tungsten core) (20mm pen)
– 8mm Brandprj m/41 (Incendiary)

  • Dimensions & Weight

Weight: 4.5 tonnes
Length: 3.40 m
Width: 1.85 m
Height: 1.95 m

  • Protection

Armour type: Riveted steel armour
Armour thickness: 6–15 mm

  • Crew

Crew size: 2 (commander/gunner and driver)

  • Mobility

Maximum road speed: 60 km/h
Trench crossing capability: 1.6 m
Obstacle climbing: 0.6 m
Fording depth: 0.9 m
Gradient climbing ability: 45°
Side slope capability: 45°

  • Engine

Engine type: Volvo FC-CKD petrol engine
Power output: 85 hp
Transmission: Mechanical transmission with preselector gearbox


Camoflages:

Dark Grey:
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Grey/Brown
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Summer:

Forrest:

Current In-game Camo:
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How would it be implimented into War thunder?

The Strv m/37 Has good mobility, Decent armour to resist Rifle calibre weapons And is small, And it has two “Ksp m/36 Strv” That can be equipped with AP rounds that can punch through 20mm of armour, So a good implimentation would be as either a new Reserve tank for sweden before some of the swedish tanks as this was historically the first mass produced tank in sweden and later lead to the Strv m/41 to be ordered, or it can be placed before the Pvlvv m/42 as a SPAA/Light Tank

Do You want this in-game?
  • Yes
  • No
0 voters
Should this become a New Reserve tank?
  • Yes, Put it before the Strv m/31
  • Yes, Put it before the Strv m/38
  • No, Put it before the Pvlvv fm/42
  • I do not care
  • I said no.
0 voters

Sources:

1960 Ammuntitons register

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The Swedish Ammuntion Site

The Swedish Military Ammunition Site
The Swedish Military Ammunition Site

Strv m/37 Sources

Stridsvagn m/37
Stridsvagn m/37 (1937)
Strv m/37
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4 Likes

Should probably be a reserve or SPAA just to reduce the SP cost with such anaemic armaments.
As far as i know the tungsten 8mm ammo all went to the air force after the evaluation found the ammunition to be too inaccurate?

1 Like

+1, but only because it has ammo that allows for 20 mm penetration, so it’s barely acceptable to me with that RPM of the MG. Do you have data for the guns’ elevation limitation in the turret? I am wondering if it can aim high enough to shoot at planes.

2 Likes

Tgb m/42s used by swedish and norwegian troops in congo used Tungsten rounds to deal with M8 armoured cars to varying effectiveness.


+25 if i could guess, and a ability to mount a AA MG (IRL by removing one Ksp m/36 Strv and placing it in the AA mount, but there is definetly a possability to bring an extra so possibly 2x 8mm Ksp m/36 Strv in the turret + 1x 8mm Ksp m/36 Strv in the AA mount)

3 Likes

90 degree elevation if i could guess

1 Like

Additional images of the vehicle:

Rotatable Commander periscope “Helmet”



commander / gunner / loader position without MG’s installed:


commander / gunner / loader position with MG’s installed:


Drivers position:


8mm Ksp m/36 Strv Machine guns out of their mounts:

Rear Strv m/37

Despite the shortage of tungsten in 1940, an amount of the material is reserved for a development and production of a new 8x63 AP cartridge. An AP cartridge m/39 is already in production, but the penetration capabilities is not considered sufficient. The request for the new AP cartridges comes from both the army and the air force.
The tungsten is the most relevant material to produce incandescent lamps, the electric light bulbs. It is used as the filament and cannot be exchanges for any other material really, so the prioritization is clear.

But as there is a shortage of tungsten the production is in small scale. [1]. Small caliber ammunition with a wolfram core is identified through the 15 mm black tip, compared with the “normal” AP with a 5-8 mm black tip of the projectile [2]

The tungsten projectiles is according to the SAN report of November 1941 to of been tested in Karlsborg. The results were good in the machine gun, but giving a poor accuracy in the rifle m/40 with a “considerately deviation”, not giving any tight groups on the fiering range. The already manufactured projectiles cannot be altered, so a recommendation is done to make cartridges of the produced bullets and pack them to be used in the air force machine guns. There is no need of delivering the ammunition to the army before the design is improved.
There were also thoughts of developing tracer and explosive ammunition with tungsten core, but the ideas were canceled due to the shortage of tungsten in Sweden.

SAN September 1941 [3]
The production of the projectile is running at the Luma factory in southern Hammarbyhamnen in Stockholm with a capacity of 120.000 projectiles/ month. The order for 3.000.000 projectiles will with this pace be finalized in about 3 years time.
At the trials at the Karlsborg factory, the results is good for the machine gun, while with the rifle m/40 the spreading is really large. Tests is performed to modify the rifle.

SAN report of April 1941 page 2-3
The intention is to split the order of 3 million cartridges in two, one for KATD and one for KFF.

KATD has the intention to use the ammunition only for the PV rifle m/40. They want the ammunition to be loaded with normal 8 mm m/32 cases, and put 4 PCS on the same loading clip used for the 6,5 mm m/94 ammunition.

KFF wish to have their ammunition without loading frames or ammunition belt. They wish to have the ammunition loaded to the same degree as KATD.

The designation for the cartridge is 8 mm pbr ptr m/32-40 [4]

The m/40 is on a display on a ammunition board manufaktured 1955 or later. [5]

As the results is not to satisfaction for rifle m/40, the proposal is made to load the projectiles already produced and deliver those to the airforce. As the projectiles cannot be altered, the army has to wait until the design is finalised. [6]

The marine is also listing this ammunition in their ammunitionsregister of the years 1950, 1955, 1962 and 1965.

Due to a tungsten shortage in Sweden during WWII, production of a new tungsten-core 8×63 mm armor-piercing (AP) cartridge was limited despite strong demand from both the Army and Air Force. Tungsten was primarily needed for light-bulb filaments, making ammunition a lower priority.

Development began because the existing AP cartridge (m/39) lacked sufficient penetration. The new tungsten-core rounds, identifiable by a 15 mm black tip, showed excellent penetration in machine guns but poor accuracy in the rifle m/40 during trials at Karlsborg. Since already-manufactured projectiles could not be redesigned, authorities recommended issuing them to the Air Force for machine-gun use while delaying Army adoption until improvements were made.

Production at the Luma factory in Stockholm reached about 120,000 projectiles per month, with a total order of 3 million rounds projected to take roughly three years to complete. Plans for tungsten-core tracer and explosive ammunition were abandoned because of material shortages.

The cartridge was designated 8 mm pbr ptr m/32-40. Although originally intended for the Army’s rifle m/40, it ultimately found more practical use in Tank and AA machine guns. The ammunition remained listed in Swedish Navy ammunition registers into the 1960s, indicating continued official recognition or retention in inventory.

Would be neat to see the tungsten AP in some of the swedish MGs even if it’s only a small upgrade.

Took a bit of a tour of BR 1.0 and it does seem like a lotta popular things would be outright immune to it though, while it’s hardly all of them a lot of them are gonna be the more popular ones.


IMG_7729

All vehicles with a Ksp m/36 Strv and Ksp m/39 Strv can use the rounds

2 Likes

would it be a forum suggestion or a bug report?

Good question, currently the ammunition isnt in-game so it would be a suggestion, but it used to be on swedish aircraft a few years back on aircraft with 8mm and already in-game ammunition makes it bug report. so its really either

It’s a cool tank and this is a well written suggestion, but unless the turret traverse is useful enough to track aircraft I don’t believe this should be added.

Afaik the turret is pretty Quick on the Traverse and the gun elevation and slight traverse is by hand.

As Seen its traversed by hand in this ark atleast

1b30ad10-a26e-4bde-8c82-ec1b0a7b2333
must pet. too cute
+99999999999999999999999999999999999999999999999999999999999999999999999999999999999

1 Like