Strv m/31

Strv m/31

BT-42

Strv m/31

BT-42

Sweden

I Rank

Battle rating:

AB	RB	SB
1.0	1.0	1.0

Class:

Light tank

Research:Free

Purchase:Free

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Description

The Stridsvagn m/31 is a rank I Swedish light tank with a battle rating of 1.0 (AB/RB/SB). It was introduced in Update 1.97 "Viking Fury".

General info

Survivability and armour

Armourfront / side / back

Hull24 / 24 / 20

Turret24 / 24 / 24

Crew4 people

Visibility76 %

Armour	Front (Slope angle)	Sides	Rear	Roof
Hull	14 mm (59°) Upper Glacis 24 mm (31°) Lower Glacis 24 mm (1°) Machine Gun Port and Upper Hull Front 14 mm (35°-46°) Driver's Hatch 14 mm (39°) Machine Gunner's Hatch	24 mm	8 mm Upper 20 mm Lower	8 mm Front and Rear 5 mm Middle
Turret	24 mm (14°-15°) Turret front 24 mm (1°) Gun mantlet	24 mm	24 mm	8 mm

Mobility

Speedforward / back

AB47 / 21 km/h

RB and SB43 / 19 km/h

Number of gears4 forward

3 back

Weight11.5 t

Engine power

AB286 hp

RB and SB150 hp

Power-to-weight ratio

AB24.9 hp/t

RB and SB13.0 hp/t

Game Mode	Max Speed (km/h)		Weight (tons)	Engine power (horsepower)		Power-to-weight ratio (hp/ton)
	Forward	Reverse		Stock	Upgraded	Stock	Upgraded
Arcade	47	21	11.5	310	286	26.96	24.87
Realistic	43	19		177	150	15.39	13.04

Modifications and economy

Repair cost

ABfree

RBfree

SBfree

Total cost of modifications3 440

154

Talisman cost190

Crew trainingfree

Experts1 000

Aces10

Research Aces80 000

Reward for battleAB / RB / SB

10 / 10 / 10 %

100 / 100 / 100 %

Modifications

Mobility	Protection	Firepower
Tracks Research: 440 Cost: 19 50 Suspension Brake System Research: 380 Cost: 17 45 Filters Transmission Engine	Improved Parts Improved FPE Crew Replenishment	Horizontal Drive Research: 440 Cost: 19 50 Adjustment of Fire Research: 380 Cost: 17 45 Elevation Mechanism Research: 540 Cost: 25 60 Artillery Support Research: 420 Cost: 19 50 37mm_sw_m39_APHE_ammo_pack Research: 420 Cost: 19 50 37mm_sw_kan_APDS_ammo_pack Research: 420 Cost: 19 50

Armaments

Main armament

37 mm kan m/38 cannon

Ammunition127 rounds

Reloadbasic crew → aces

4.1 → 3.1 s

Vertical guidance-10° / 25°

37 mm kan m/38					Turret rotation speed (°/s)					Reloading rate (seconds)
Mode	Capacity	Vertical	Horizontal	Stabilizer	Stock	Upgraded	Full	Expert	Aced	Stock	Full	Expert	Aced
Arcade	127	-10°/+20°	±180°	N/A	15.20	21.08	25.60	28.31	30.12	4.06	3.57	3.29	3.10
Realistic					9.50	11.20	13.60	15.04	16.00

Ammunition

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
3,7 cm slpprj m/49	APDS	105	103	97	89	82	75
slpgr m/39	APBC	55	51	37	26	17	12
slpprj m/38	APBC	59	55	41	28	19	13

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile Mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive Mass (TNT equivalent) (g)	Ricochet
							0%	50%	100%
3,7 cm slpprj m/49	APDS	1,150	0.71	N/A	N/A	N/A	75°	78°	80°
slpgr m/39	APBC	800	0.74	1.2	9.0	15	47°	60°	65°
slpprj m/38	APBC	785	0.74	N/A	N/A	N/A	47°	60°	65°

Ammo racks

Full ammo	1st rack empty	2nd rack empty	3rd rack empty	4th rack empty	5th rack empty	6th rack empty	Visual discrepancy
127	111 (+16)	67 (+60)	45 (+82)	0 (+127)	__ (+__)	__ (+__)	__

Machine guns

6.5 mm ksp m/14-29 machine gun (coaxial)

Ammunition4 000 rounds

Belt capacity250 rounds

Reloadbasic crew → aces

3.9 → 3.0 s

Fire rate499 shots/min

The Strv m/31 is equipped with a 6.5 mm machine gun, nothing out of the ordinary. It is useful for attacking AA vehicles or more lightly armoured foes.

6.5 mm ksp m/14-29
Mount	Capacity (Belt capacity)	Rate of fire (shots/minute)	Vertical guidance	Horizontal guidance
Coaxial	4,000 (250)	498	N/A	N/A

Usage in battles

The Strv m/31 is a light tank with poor armour. It shouldn't be used to rush into the heat of the battle or you will get knocked out very quickly. Its armour is inadequate, it can't even stop 12.7 mm HMG fire. Instead, it should be used to flank other enemy tanks, using your excellent speed to your advantage. The Strv m/31 has an unconventional armour layout. Its frontal area (eg.upper hull, glacis area) armour is very weak while the rear is really strong. This tank also has pretty good speed in reverse, so you can drive into battle facing backwards using your rear armour and engine to soak up damage.

Pros and cons

Pros:

• Access to APDS ammunition that can penetrate up to 105 mm
• APDS has high velocity, making it easy to aim at longer distances
• Very good reverse speed, it will save you in many situations
• Can bounce shots if angled properly

Cons:

• APDS has no explosive filler, multiple shots will be needed to finish off a tank
• Very weak stock shell (low penetration and post-pen damage)
• Armor is poor, even for a rank one reserve vehicle
• Acceleration and top speed is quite poor, will find itself getting outrun by most vehicles.

History

The Strv m/31 was built by AB Landsverk in 1932. The tank was advanced for it's time such as it's use of all welded armor and using periscopes instead of view slits. These features were desirable to the Swedish armed forces and was put into service in 1935. Only 3 were ever built before the German invasion in 1940 making it a very rare tank. It wasn't used for direct tank on tank combat despite being highly advanced, but were dug into the ground as static bunkers.

Devblog

Swedish tanks aren’t very well known even by many enthusiastic historians or fans of military vehicles. However, many of the design and technological solutions conceived by Swedish tank designers were unique and rather practical. Sweden’s armoured vehicles are truly fascinating, and the Swedish ground vehicle line in War Thunder will present to you some highly original tanks with one-of-a-kind features and gameplay finer points. We’ll start our overview of the Swedish tech tree by looking at the first tank starting the progress of all the Swedish ground vehicles. Meet the reserve Strv m/31 (from “Stridsvagn”, Swedish for “tank”), a 1935 light tank. According to some experts, this little tank came close to being the most high-tech tank of its time!

In 1930, the Swedish firm Landsverk developed two tank designs – one fully tracked and the other with a wheel/track arrangement – differing in their chassis construction and armour. In the autumn of 1931, the Swedish government ordered four experimental prototypes – one wheel-and-track and the other three fully tracked. The versatile tank could switch from tracks to wheels in an incredible 30 seconds flat and reach speeds of up to 80 km/h in such a configuration! However, the wheels were unable to bear the weight of substantial armour, so it was limited to 14 mm for this modification. The fully tracked version could cope with armour up to 24mm thick, which is pretty respectable for a pre-war vehicle. Moreover, the designers took a risk by choosing welded armour plating over the more common riveted design, this also had its advantages. Even more interesting is that they set the angle of the frontal armour plate in order to increase the chance of enemy shells ricocheting. Put into service under the designation Strv m/31, the new tank was given the Maybach petrol engine, which was able to provide a power-to-weight ratio of approximately 17-18 horsepower per ton. The tank’s armament comprised a 37mm cannon with 122 rounds. All of the prototypes were put into service, though they required certain improvements. The vehicles’ weak point was their unreliable and difficult-to-maintain suspension, as well as the tanks’ overreliance on foreign-made components. The tanks were used as training vehicles.

Media

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The Shooting Range #191 - Metal Beasts section at 00:50 discusses the Strv m/31.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

• reference to the series of the vehicles;
• links to approximate analogues of other nations and research trees.

External links

• [Devblog] Stridsvagn m/31