Difference between revisions of "BM-31-12"
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|code=ussr_bm_31_12 | |code=ussr_bm_31_12 | ||
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| − | 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. | + | * 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. |
| + | {{Clear}} | ||
== Usage in battles == | == Usage in battles == | ||
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== 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 If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: 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 If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the vehicle and adding a block "/History" (example: 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. | ||
| + | |||
| + | - From ''[[wt:en/news/8222-development-bm-31-12-katyusha-s-little-brother-en|Devblog]]'' | ||
== Media == | == Media == | ||
Latest revision as of 04:41, 18 June 2023
Contents
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
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
| 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
2 × 90 / 140 / 150 % 2 × 136 / 136 / 136 % | Mobility | Protection | Firepower | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
Armaments
Main armament
| 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
| 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 · 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 |
