BM-31-12

From War Thunder Wiki
Jump to: navigation, search
Rank IV USSR | Premium | Golden Eagles
Tu-1 Pack
BM-31-12
ussr_bm_31_12.png
GarageImage BM-31-12.jpg
ArtImage BM-31-12.png
ArtImage2 BM-31-12.png
BM-31-12
Show in game

Description

The BM-31-12, also known as "Andryusha", is a premium gift rank III Soviet tank destroyer with a battle rating of 4.0 (AB/RB/SB). It was introduced in Update "Sky Guardians" as a reward for the 2023 Legend of Victory event. A highly unusual vehicle, reminiscent of its smaller brother, the BM-13N. Not only is its truck-based configuration not the most common, but it also uses 12 x 300 mm M-31-UK rockets as its main armament, has limited traverse, has only 2 crew members, and a gun depression of +8°. The last is somewhat compensated by its ability to lean forwards with a hydropneumatic suspension system usually found on higher rank vehicles. Its gameplay is best compared with its smaller sibling, the BM-13N "Katyusha".

The Andryusha is an artillery piece, belonging more in an artillery formation than in a tank battle. One should stay at a distance from the enemies since its rockets have a blind zone of about 800 m in front of the truck when moving on a flat surface.

General info

Survivability and armour

Armourfront / side / back
Hull4 / 4 / 4
Turret0 / 0 / 0
Crew2 people
Visibility75 %

Being designed for rear-line support, the BM-31-12 lacks any real armour. Being a simple truck, even rifle-calibre machine guns can penetrate the vehicle and knock out the two crew members. Therefore, the vehicle is extremely vulnerable to overpressure (HE shells, rockets, bombs, and artillery strikes) as well as strafing aircraft and tank coaxial/roof machine guns. It is best to play at a distance from the frontline and with some cover nearby to retreat behind once the enemy presence increases, as your mobility isn't great either.

Armour type:

  • Rolled homogeneous armour (Roof and window covers)
  • Structural steel (Chassis and driver's cabin)
  • Gun Steel (Rocket launcher)
Armour Front (Slope angle) Sides Rear Roof
Chassis 30 mm 30 mm 30 mm 5 mm
Cabin 1 mm (77-86°) Hood
4 mm (38°) Driver's windows
1 mm (1-8°) Doors
4 mm (1-8°) Windows
1 mm (1-8°) Cabin
4 mm (86°) Rear cover
4 mm
Launcher 5 mm (10°) 5 mm 5 mm (10°)

Notes:

  • Wheels are 10 mm thick.
  • No armour in front grille, simple 7.62 mm machine gun rounds can enter and damage the engine.

Mobility

 
Controlled suspension
It is possible to adjust the ground clearance or more complex suspension positions
Speedforward / back
AB79 / 11 km/h
RB and SB73 / 10 km/h
Number of gears5 forward
1 back
Weight6.4 t
Engine power
AB181 hp
RB and SB95 hp
Power-to-weight ratio
AB28.3 hp/t
RB and SB14.8 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 79 11 6.4 135 181 21.09 28.28
Realistic 73 10 84 95 13.13 14.84

Modifications and economy

Repair cost
AB1 761 Sl icon.png
RB2 092 Sl icon.png
SB1 524 Sl icon.png
Crew training10 000 Sl icon.png
Experts67 000 Sl icon.png
Aces330 Ge icon.png
Research Aces570 000 Rp icon.png
Reward for battleAB / RB / SB
Talisman.png 2 × 90 / 140 / 150 % Sl icon.png
Talisman.png 2 × 136 / 136 / 136 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new wheels.png
Tires
Mods new car suspension.png
Suspension
Mods new tank break.png
Brake System
Mods new tank filter.png
Filters
Mods new tank transmission.png
Transmission
Mods new tank engine.png
Engine
Mods tank tool kit.png
Improved Parts
Mods extinguisher.png
Improved FPE
Mods tank reinforcement ussr.png
Crew Replenishment
Mods new tank horizontal aiming.png
Horizontal Drive
Mods new tank vertical aiming.png
Elevation Mechanism
Mods art support.png
Artillery Support

Armaments

Main armament

300 mm M-31 rocket
Ammunition12 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Vertical guidance10° / 48°
Horizontal guidance-10° / 10°
Flight speed245 m/s
Range4 000 m
Main article: M-31
M-31 rocket Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 12 +10°/+48° ±10° - 6.2 8.5 10.4 11.4 12.2 10.40 9.20 8.48 8.00
Realistic 4.2 4.9 6.0 6.6 7.0

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
M-31-UK Rocket 66 66 66 66 66 66
Shell details
Ammunition Type of
warhead
Velocity
(m/s)
Projectile
mass (kg)
Fuse delay
(m)
Fuse sensitivity
(mm)
Explosive mass
(TNT equivalent) (kg)
Ricochet
0% 50% 100%
M-31-UK Rocket 245 91.5 0 0.1 28.9 79° 80° 81°

Ammo racks

Ammo racks of the BM-31-12
Full
ammo
Visual
discrepancy
12 No

Notes:

  • Rockets deplete inwards, starting from the outside-left rocket on the top row. Rockets then deplete outwards, starting with the inner left rocket on the bottom row.

Usage in battles

There are two main ways to use the Andryusha, which are very similar in playstyle to its smaller sibling, the Katyusha

Artillery

Usage of this vehicle in its intended role of rear-line support and artillery strike. One should estimate the correct angle, shoot a rocket, watch where it lands, adjust fire, and retry it as needed. Do not take too much time with this method of rangefinding since a single retaliatory shot can end your day. Once the correct sight distance is found, unleash hell on your enemies, blinding them with dust lifting up from the ground, detonating ammo racks and blasting off tracks. This is basically an intelligent artillery barrage. Once all rockets are fired, fall back behind allied lines, find a captured objective to reload at, and repeat. Keep in mind that the M-31-UK rockets have a very loud launch noise, and will alert enemies all around to your presence.

There is little the Andryusha can do against enemy aircraft, which can destroy the vehicle with as little as a half-second machine gun burst or a relatively close detonation of a bomb or rocket. Try not to get caught out in the open, and try to hide behind obstacles. It's always recommended to have friendly cover while playing this vehicle.

Ambusher

Best used in urban or dense maps, where enemies will usually rush down a path or corridor quickly without checking all of their surroundings. Find yourself a pile of rubble or other kind of short cover and lower the front suspension of the truck in such a way that you can fire right in front of you just past the obstacle. When an enemy passes by, simply hit it with a rocket. This tactic is often a last resort when you're cornered and encircled. You may destroy one or more enemies if you're lucky, but you will eventually be caught or your rockets will run out.

Pros and cons

Pros:

  • Very powerful 300 mm rockets with a high explosive mass. Able to take out almost all vehicles in a single direct hit
  • Adjustable suspension
  • Can be used in deceptions: a similar model is used as a static decoration on some maps, with a different launcher and with the armour plates lifted. This may allow the player to hide in plain sight. Works better when in groups of 2 Andryushas or more, and especially if someone in your squad has the Katyusha

Cons:

  • Very poor survivability
  • Has issues traversing rough and muddy terrains, to be expected from a wheeled vehicle
  • Poor horizontal launcher traverse
  • Low ammunition supply of 12 rockets
  • Loud and distinguishable firing sound
  • Lacks other armaments beside rockets
  • Large dead zone in front of vehicle, up to 800 m on level terrain (launcher depression of +10°)
  • Vehicle cannot move properly while suspension is adjusted

History

Unguided 300 mm M-30 rockets were used by the Red Army since 1942 as a field artillery, being fired from metal frames right in the transporting containers. Soon, an upgraded version of the rocket appeared under the designation M-31 with an improved engine and a significantly increased range. Engineers from the special design bureau of the Moscow Kompressor plant designed a combat vehicle on the chassis of the US-built Studebaker US6 three-axle truck with a framework of 12 welded rails to launch these powerful rockets. The machine was successfully tested in the spring of 1944 and was put into service in June under the designation BM-31-12. In the troops, by analogy with the Katyusha MLRS, the new vehicle was nicknamed Andryusha (“little Andrey” in Russian).

Rocket launchers Andryusha were widely used in the battles of the final stages of WWII in Europe, including the urban battles as a fire support for Soviet storming troops. In total, the Red Army received 1,807 BM-31-12 Andryusha vehicles until the end of the war.

- From Devblog

Media

Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Other vehicles of similar configuration and role

External links


USSR tank destroyers
SU-76M  SU-76M · SU-76M (5th Gv.Kav.Corps) · SU-85A
SU-57B  SU-57B · SU-76D
T-34 Derivatives  SU-122 · SU-85 · SU-85M · SU-100 · SU-122P
Heavy Tank Derivatives  SU-100Y · ISU-122 · ISU-122S · SU-152 · ISU-152 · Object 268
SU-100P and Derivatives  SU-100P · Object 120
Wheeled  YaG-10 (29-K)
Airborne  ASU-57 · ASU-85
Rocket  BM-8-24 · BM-13N · BM-31-12
ATGM  IT-1 · Shturm-S · Khrizantema-S
Artillery  2S1 · 2S3M
Other  SU-5-1 · ZiS-30 · SU-122-54 · Object 775
USA  SU-57

USSR premium ground vehicles
Light tanks  BA-11 · RBT-5 · BT-7A (F-32) · T-26 (1st Gv.T.Br.) · T-26E · T-126 · PT-76-57 · 2S38
Medium tanks  T-34 (Prototype) · T-34 (1st Gv.T.Br.) · T-34E · T-34-57 (1943) · T-34-85E · T-34-100 · T-44-122 · TO-55 · T-55AM-1 · T-72AV (TURMS-T)
  ▂M3 Medium · ▂M4A2 · ▂T-III · ▂T-V · ▂МК-IX "Valentine"
Heavy tanks  SMK · T-35 · ▂MK-II "Matilda" · KV-1E · KV-2 (1940) · KV-2 (ZiS-6) · KV-122 · KV-220 · IS-2 "Revenge" · Object 248 · IS-6 · T-10A
Tank destroyers  BM-8-24 · BM-13N · BM-31-12
  SU-57 · SU-76D · SU-76M (5th Gv.Kav.Corps) · SU-85A · SU-100Y · SU-122P · Object 120
SPAA  ▂Phòng không T-34 · ZUT-37