Difference between revisions of "BM-31-12"

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{{Writing|DonutWMustache}}
 +
 
{{Specs-Card
 
{{Specs-Card
 
|code=ussr_bm_31_12
 
|code=ussr_bm_31_12
−
|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg|ArtImage_{{PAGENAME}}.png|ArtImage2_{{PAGENAME}}.png}}
+
|images={{GarageImage_{{PAGENAME}}.jpg}}
 
}}
 
}}
  
−
== Description ==
+
== Description==<!-- ''In the description, the first part should be about the history of the creation and combat usage of the vehicle, as well as its key features. In the second part, tell the reader about the ground vehicle in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
−
<!-- ''In the description, the first part should be about the history of the creation and combat usage of the vehicle, as well as its key features. In the second part, tell the reader about the ground vehicle in the game. Insert a screenshot of the vehicle, so that if the novice player does not remember the vehicle by name, he will immediately understand what kind of vehicle the article is talking about.'' -->
+
 
−
The '''{{Specs|name}}''', also known as "Andryusha", is a premium gift rank {{Specs|rank}} Soviet tank destroyer {{Battle-rating}}. It was introduced in [[Update "Sky Guardians"]] as a reward for the [[wt:en/news/8227-event-legend-of-victory-bm-31-12-andryusha-en|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|hydropneumatic suspension system]] usually found on higher rank vehicles. Its gameplay is best compared with its smaller sibling, the [[BM-13N|BM-13N "Katyusha"]].
+
The '''{{Specs|name}}''' is a premium gift rank {{Specs|rank}} Soviet tank destroyer {{Battle-rating}} also known as "Andryusha". It was introduced during May 2023 as part of the [[wt:en/news/4687-vday-bm-13n-say-hello-from-katyusha-en|2023 Legends 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|hydropneumatic suspension system]] usually found on higher rank vehicles. Its gameplay is best compared with its smaller sibling, the [[BM-13N|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.
+
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 300 m in front of the truck when moving on a flat surface.
  
−
== General info ==
+
== General info==
−
=== Survivability and armour ===
+
=== Survivability and armour===
−
{{Specs-Tank-Armour}}
+
{{Specs-Tank-Armour}} <!-- ''Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat? If necessary use a visual template to indicate the most secure and weak zones of the armour.'' -->
−
<!-- ''Describe armour protection. Note the most well protected and key weak areas. Appreciate the layout of modules as well as the number and location of crew members. Is the level of armour protection sufficient, is the placement of modules helpful for survival in combat? If necessary use a visual template to indicate the most secure and weak zones of the armour.'' -->
 
  
−
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.
+
Being designed for rear-line support, the  BM-31-12 lacks any real armor. Being a simple truck, even rifle-calibre machine gun 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:'''
 
'''Armour type:'''
Line 29: Line 30:
 
|Chassis||30 mm||30 mm||30 mm||5 mm
 
|Chassis||30 mm||30 mm||30 mm||5 mm
 
|-
 
|-
−
|Cabin||1 mm (77-86°) ''Hood''<br>4 mm (38°) ''Driver's windows''
+
|Cabin||1 mm (77-86°) ''Hood''  
−
|1 mm (1-8°) ''Doors''<br>4 mm (1-8°) ''Windows''
+
4 mm (38°) ''Driver's windows''  
−
|1 mm (1-8°) ''Cabin''<br>4 mm (86°) ''Rear cover''
+
|1 mm (1-8°) ''Doors''
 +
4 mm (1-8°) ''Windows''
 +
|1 mm (1-8°) ''Cabin''
 +
4 mm (86°) ''Rear cover''
 
|4 mm
 
|4 mm
 
|-
 
|-
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|
 
|
 
|-
 
|-
−
|}
+
|}'''Notes:'''
−
 
 
−
'''Notes:'''
 
  
 
*Wheels are 10 mm thick.
 
*Wheels are 10 mm thick.
 
*No armour in front grille, simple 7.62 mm machine gun rounds can enter and damage the engine.
 
*No armour in front grille, simple 7.62 mm machine gun rounds can enter and damage the engine.
  
−
=== Mobility ===
+
=== Mobility===
−
{{Specs-Tank-Mobility}}
+
{{Specs-Tank-Mobility}} <!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' --> {{tankMobility|abMinHp= 134|rbMinHp= 84|AoAweight=}}
−
<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
 
  
−
{{tankMobility|abMinHp=135|rbMinHp=84}}
+
Being a wheeled vehicle with a rather high ground pressure, the BM-31-12 has issues traversing soft and uneven terrain (sand, snow, mud, hills), as expected from a truck. On hard terrain (roads, concrete, etc.), it can reach 72 km/h but the acceleration to get to those speeds is poor. The brakes are not powerful so you'll have to anticipate the braking phases to stop in time. The turn radius is also quite large: you won't be able to change directions easily
  
−
=== Modifications and economy ===
+
=== Modifications and economy===
 
{{Specs-Economy}}
 
{{Specs-Economy}}
  
−
== Armaments ==
+
== Armaments==
 
{{Specs-Tank-Armaments}}
 
{{Specs-Tank-Armaments}}
−
=== Main armament ===
+
=== Main armament===
−
{{Specs-Tank-Weapon|1}}
+
{{Specs-Tank-Weapon|1}} <!-- ''Give the reader information about the characteristics of the main gun. Assess its effectiveness in a battle based on the reloading speed, ballistics and the power of shells. Do not forget about the flexibility of the fire, that is how quickly the cannon can be aimed at the target, open fire on it and aim at another enemy. Add a link to the main article on the gun: <code><nowiki>{{main|Name of the weapon}}</nowiki></code>. Describe in general terms the ammunition available for the main gun. Give advice on how to use them and how to fill the ammunition storage.'' --> {{main|M13}}
−
<!-- ''Give the reader information about the characteristics of the main gun. Assess its effectiveness in a battle based on the reloading speed, ballistics and the power of shells. Do not forget about the flexibility of the fire, that is how quickly the cannon can be aimed at the target, open fire on it and aim at another enemy. Add a link to the main article on the gun: <code><nowiki>{{main|Name of the weapon}}</nowiki></code>. Describe in general terms the ammunition available for the main gun. Give advice on how to use them and how to fill the ammunition storage.'' -->
 
−
{{main|M-31}}
 
  
−
{| class="wikitable" style="text-align:center" width="100%"
+
{| class="wikitable" width="100%" style="text-align:center"
 
|-
 
|-
−
! colspan="5" | [[M-31]] rocket || colspan="5" | Turret rotation speed (°/s) || colspan="4" | Reloading rate (seconds)
+
! colspan="5" |300 mm M31-UK rockets|| colspan="5" |Turret rotation speed (°/s)|| colspan="4" |Reloading rate (seconds)
 
|-
 
|-
−
! Mode !! Capacity !! Vertical !! Horizontal !! Stabilizer
+
!Mode!!Capacity!!Vertical!!Horizontal!!Stabilizer
−
! Stock !! Upgraded !! Full !! Expert !! Aced
+
!Stock!!Upgraded!!Full!!Expert!!Aced
−
! Stock !! Full !! Expert !! Aced
+
!Stock!!Full!!Expert!!Aced
 
|-
 
|-
−
! ''Arcade''
+
!''Arcade''
−
| rowspan="2" | 12 || rowspan="2" | +10°/+48° || rowspan="2" | ±10° || rowspan="2" | - || 6.2 || 8.5 || 10.4 || 11.4 || 12.2 || rowspan="2" | 10.40 || rowspan="2" | 9.20 || rowspan="2" | 8.48 || rowspan="2" | 8.00
+
| rowspan="2" |12|| rowspan="2" |+10°/+48°|| rowspan="2" |±10°|| rowspan="2" |N/A||6.2||8.5||10.4||11.5||12.2|| rowspan="2" |10.40|| rowspan="2" |9.20|| rowspan="2" |8.48|| rowspan="2" |8.00
−
|-
 
−
! ''Realistic''
 
−
| 4.2 || 4.9 || 6.0 || 6.6 || 7.0
 
 
|-
 
|-
 +
!''Realistic''
 +
|4.2||4.9||6.0||6.6||7.0
 
|}
 
|}
 +
==== Ammunition====
 +
{{:M13/Ammunition|1=M-31-UK}}
  
−
==== Ammunition ====
+
====[[Ammo racks]]====
−
{{:M-31/Ammunition|M-13-UK}}
+
[[File:Ammoracks BM-31-12.png|thumb|Ammo racks and firing order of BM-31-12]]<!-- '''Last updated:''' -->
  
−
==== [[Ammo racks]] ====
 
−
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
 
−
<!-- '''Last updated:''' -->
 
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
−
! Full<br>ammo
+
!Full
−
! Visual<br>discrepancy
+
ammo
 +
!Visual
 +
discrepancy
 
|-
 
|-
−
| '''12''' || No
+
|'''12'''||No
 
|-
 
|-
 
|}
 
|}
 +
Notes:
  
−
'''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. See attached image.
  
−
* 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==<!-- ''Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but instead give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
−
{{Clear}}
 
−
 
 
−
== Usage in battles ==
 
−
<!-- ''Describe the tactics of playing in the vehicle, the features of using vehicles in the team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view but instead give the reader food for thought. Describe the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).'' -->
 
  
 
There are two main ways to use the Andryusha, which are very similar in playstyle to its smaller sibling, the [[BM-13N|Katyusha]]
 
There are two main ways to use the Andryusha, which are very similar in playstyle to its smaller sibling, the [[BM-13N|Katyusha]]
Line 106: Line 102:
 
'''Artillery'''
 
'''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.
+
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 firing the M-31-UK rocket 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.
+
There is little the Andryusha can do against enemy aircraft, which can kill 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. Its always recommended to have friendly cover while playing this vehicle.
  
 
'''Ambusher'''
 
'''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.
+
Best used in an urban or dense maps, where enemies usually will rush down a path or corridor quickly without checking all of their sorroundings. 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 kill one or more enemies if you're lucky, but you will eventually be caught or your rockets will run out.
  
−
=== Pros and cons ===
+
=== Pros and cons===<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in a bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
−
<!-- ''Summarise and briefly evaluate the vehicle in terms of its characteristics and combat effectiveness. Mark its pros and cons in a bulleted list. Try not to use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - use substitutions with softer forms such as "inadequate" and "effective".'' -->
 
  
 
'''Pros:'''
 
'''Pros:'''
Line 121: Line 116:
 
*Very powerful 300 mm rockets with a high explosive mass. Able to take out almost all vehicles in a single direct hit
 
*Very powerful 300 mm rockets with a high explosive mass. Able to take out almost all vehicles in a single direct hit
 
*Adjustable suspension
 
*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 [[BM-13N|Katyusha]]
+
*Can be used in deceptions: a similar model is used as a static decoration on some maps, with a different launcher and with the armor 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 [[BM-13N|Katyusha]]
 +
*Launcher sight helps with aiming to play as an indirect fire weapon
  
 
'''Cons:'''
 
'''Cons:'''
Line 131: Line 127:
 
*Loud and distinguishable firing sound
 
*Loud and distinguishable firing sound
 
*Lacks other armaments beside rockets
 
*Lacks other armaments beside rockets
−
*Large dead zone in front of vehicle, up to 800 m on level terrain (launcher depression of +10°)
+
*Large dead zone in front of vehicle up to 250 m (launcher depression of +10°)
 
*Vehicle cannot move properly while suspension is adjusted
 
*Vehicle cannot move properly while suspension is adjusted
 +
*In RB & SB, cannot reload unless on allied capture point and can only reload one rocket at a time; can sometimes take around 2 minutes to completely reload its rockets
  
−
== History ==
+
== History==<!-- ''Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
−
<!-- ''Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' -->
 
−
 
 
−
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.
+
''Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Vehicle-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).''
  
−
- From ''[[wt:en/news/8222-development-bm-31-12-katyusha-s-little-brother-en|Devblog]]''
+
== Media==<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
  
−
== Media ==
 
−
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
 
 
''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
 
''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
  
−
== See also ==
+
== See also==<!-- ''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
−
<!-- ''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;''
 
* ''reference to the series of the vehicles;''
 
* ''links to approximate analogues of other nations and research trees.'' -->
 
* ''links to approximate analogues of other nations and research trees.'' -->
Line 157: Line 148:
 
*[[BM-8-24]]
 
*[[BM-8-24]]
  
−
== External links ==
+
== External links==<!-- ''Paste links to sources and external resources, such as:''
−
<!-- ''Paste links to sources and external resources, such as:''
 
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
 
* ''other literature.'' -->
 
* ''other literature.'' -->
  
−
*[[wt:en/news/8227-event-legend-of-victory-bm-31-12-andryusha-en|[Event] Legend of Victory: BM-31-12 "Andryusha"]]
+
*[[wt:en/news/8227-event-legend-of-victory-bm-31-12-andryusha-en|[Event] Legend of Victory: BM-31-12 “Andryusha”]]
 
*[[wt:en/news/8222-development-bm-31-12-katyusha-s-little-brother-en|[Devblog] BM-31-21: Katyusha's Little Brother]]
 
*[[wt:en/news/8222-development-bm-31-12-katyusha-s-little-brother-en|[Devblog] BM-31-21: Katyusha's Little Brother]]
  
−
{{USSR tank destroyers}}
+
{{USSR tank destroyers}} {{USSR premium ground vehicles}}
−
{{USSR premium ground vehicles}}
 
−
[[Category:Wheeled ground vehicles]]
 

Revision as of 02:59, 11 May 2023

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BM-31-12
ussr_bm_31_12.png
Template:GarageImage BM-31-12.jpg
BM-31-12

 Description

The BM-31-12 is a premium gift rank Soviet tank destroyer with a battle rating of (AB), (RB), and (SB) also known as "Andryusha". It was introduced during May 2023 as part of the 2023 Legends 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 300 m in front of the truck when moving on a flat surface.

 General info

 Survivability and armour

Being designed for rear-line support, the BM-31-12 lacks any real armor. Being a simple truck, even rifle-calibre machine gun 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

Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade Expression error: Unexpected * operator. 134 Expression error: Unexpected round operator. __.__
Realistic 84 Expression error: Unexpected round operator. __.__

Being a wheeled vehicle with a rather high ground pressure, the BM-31-12 has issues traversing soft and uneven terrain (sand, snow, mud, hills), as expected from a truck. On hard terrain (roads, concrete, etc.), it can reach 72 km/h but the acceleration to get to those speeds is poor. The brakes are not powerful so you'll have to anticipate the braking phases to stop in time. The turn radius is also quite large: you won't be able to change directions easily

 Modifications and economy

 Armaments

 Main armament

Main article: M13
300 mm M31-UK rockets 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° N/A 6.2 8.5 10.4 11.5 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
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%

Ammo racks

Ammo racks and firing order of 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. See attached image.

 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 firing the M-31-UK rocket 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 kill 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. Its always recommended to have friendly cover while playing this vehicle.

Ambusher

Best used in an urban or dense maps, where enemies usually will rush down a path or corridor quickly without checking all of their sorroundings. 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 kill 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 armor 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
  • Launcher sight helps with aiming to play as an indirect fire weapon

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 250 m (launcher depression of +10°)
  • Vehicle cannot move properly while suspension is adjusted
  • In RB & SB, cannot reload unless on allied capture point and can only reload one rocket at a time; can sometimes take around 2 minutes to completely reload its rockets

 History

Describe the history of the creation and combat usage of the vehicle in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: https://wiki.warthunder.com/(Vehicle-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under === In-game description ===, also if applicable).

 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 · Object 775 · Khrizantema-S
Artillery  2S1 · 2S3M
Other  SU-5-1 · ZiS-30 · SU-122-54
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) · T-80UD · Т-80U-Е1
  ▂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

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