Difference between revisions of "ISU-122"

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{{Specs-Card|code=ussr_isu_122}}
 
{{Specs-Card|code=ussr_isu_122}}
 
{{About
 
{{About
−
|about=tank destroyer '''{{PAGENAME}}'''
+
|about=Soviet tank destroyer '''{{PAGENAME}}'''
 
|usage=the version equipped with a D-25S cannon
 
|usage=the version equipped with a D-25S cannon
 
|link=ISU-122S
 
|link=ISU-122S
Line 7: Line 7:
  
 
== 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.'' -->
 
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
 
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
−
{{break}}
+
{{Break}}
−
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Russian tank destroyer {{Battle-rating}}. It was introduced during the Closed Beta Test for Ground Forces before [[Update 1.41]].
+
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Soviet tank destroyer {{Battle-rating}}. It was introduced during the Closed Beta Test for Ground Forces before Update 1.41.
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and 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?''
+
<!-- ''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.'' -->
−
 
 
−
''If necessary use a visual template to indicate the most secure and weak zones of the armour.''-->
 
 
'''Armour type:'''
 
'''Armour type:'''
 
* Rolled homogeneous armour
 
* Rolled homogeneous armour
Line 24: Line 22:
 
! Armour !! Front !! Sides !! Rear !! Roof
 
! Armour !! Front !! Sides !! Rear !! Roof
 
|-
 
|-
−
| Hull || 60 mm (75°) ''Front glacis'' <br> 90 mm (31°) ''Lower glacis'' || 90 mm || 60 mm (50°) ''Top'' <br> 60 mm (39°) ''Bottom'' || 30 mm  
+
| Hull || 60 mm (75°) ''Front glacis'' <br> 90 mm (31°) ''Lower glacis'' || 90 mm || 60 mm (50°) ''Top'' <br> 60 mm (39°) ''Bottom'' || 30 mm
 
|-
 
|-
−
| Superstructure || 90 mm (30°) ''Front glacis'' <br> 65 mm (7-69°) ''Gun mantlet case'' <br> 100 mm ''Gun mantlet'' (0-45°) || 75 mm (14-15°) || 60 mm || 30 mm  
+
| Superstructure || 90 mm (30°) ''Front glacis'' <br> 65 mm (7-69°) ''Gun mantlet case'' <br> 100 mm ''Gun mantlet'' (0-45°) || 75 mm (14-15°) || 60 mm || 30 mm
 
|-
 
|-
 
|}
 
|}
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<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
 
<!-- ''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= 739|rbMinHp= 460|<!--AoAweight=(optional) -->}}
+
{{tankMobility|abMinHp=739|rbMinHp=460}}
  
 
== Armaments ==
 
== Armaments ==
 
=== Main armament ===
 
=== Main armament ===
−
<!-- ''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.'' The text within these arrows are not to be deleted -->
+
<!-- ''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.'' -->
−
''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|A-19 (122 mm)}}
 
{{main|A-19 (122 mm)}}
  
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|-
 
|-
 
! ''Arcade''
 
! ''Arcade''
−
| rowspan="2" | 30 || rowspan="2" | -3°/+22° || rowspan="2" | -3°/+7° || rowspan="2" | N/A || 6.16 || 8.53 || __.__ || __.__ || 12.19 || rowspan="2" | 26.0 || rowspan="2" | _.__ || rowspan="2" | _.__ || rowspan="2" | 20.0
+
| rowspan="2" | 30 || rowspan="2" | -3°/+22° || rowspan="2" | -3°/+7° || rowspan="2" | N/A || 6.16 || 8.53 || __.__ || __.__ || 12.19 || rowspan="2" | 26.00 || rowspan="2" | _.__ || rowspan="2" | _.__ || rowspan="2" | 20.00
 
|-
 
|-
 
! ''Realistic''
 
! ''Realistic''
−
| 4.17 || 4.9 || __.__ || __.__ || 7.0
+
| 4.17 || 4.90 || __.__ || __.__ || 7.00
 
|-
 
|-
 
|}
 
|}
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* '''OF-471''': HE; for destroying open and lightly armoured vehicles. While it is a standard shell for a Soviet vehicle, prioritize using your heavy machine gun to deal with lightly armoured targets because of the long reload time of the {{PAGENAME}}.
 
* '''OF-471''': HE; for destroying open and lightly armoured vehicles. While it is a standard shell for a Soviet vehicle, prioritize using your heavy machine gun to deal with lightly armoured targets because of the long reload time of the {{PAGENAME}}.
  
−
{| width="100%" class="wikitable sortable" style="text-align:center"
+
{| class="wikitable sortable" style="text-align:center" width="100%"
 
! colspan="8" | Penetration statistics
 
! colspan="8" | Penetration statistics
 
|-
 
|-
 
! rowspan="2" data-sort-type="text" | Ammunition
 
! rowspan="2" data-sort-type="text" | Ammunition
−
! class="unsortable" rowspan="2" | Type of <br /> warhead
+
! rowspan="2" | Type of<br>warhead
−
! colspan="6" | '''Penetration''' '''''in mm''''' '''@ 90°'''
+
! colspan="6" | '''Penetration @ 0° Angle of Attack (mm)'''
 +
|-
 +
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
 
|-
 
|-
−
! 10m
+
| BR-471 || APHE || 205 || 201 || 183 || 162 || 144 || 128
−
! 100m
 
−
! 500m
 
−
! 1000m
 
−
! 1500m
 
−
! 2000m
 
 
|-
 
|-
−
| BR-471 || APHE || 205 || 201 || 183 || 162 || 144 || 128
+
| BR-471B || APHEBC || 205 || 203 || 191 || 178 || 166 || 155
 
|-
 
|-
−
| BR-471B || APHEBC || 205 || 203 || 191 || 178 || 166 || 155
+
| OF-471 || HE || 37 || 37 || 37 || 37 || 37 || 37
−
|-
 
−
| OF-471 || HE || 37 || 37 || 37 || 37 || 37 || 37  
 
 
|-
 
|-
 
|}
 
|}
−
 
+
{| class="wikitable sortable" style="text-align:center" width="100%"
−
{| width="100%" class="wikitable sortable" style="text-align:center"
+
! colspan="10" | Shell details
−
! colspan="11" | Shell details
 
 
|-
 
|-
 
! rowspan="2" data-sort-type="text" | Ammunition
 
! rowspan="2" data-sort-type="text" | Ammunition
−
! class="unsortable" rowspan="2" | Type of <br /> warhead
+
! rowspan="2" | Type of<br>warhead
−
! rowspan="2" |Velocity <br /> in m/s
+
! rowspan="2" | Velocity<br>(m/s)
−
! rowspan="2" |Projectile<br />Mass in kg
+
! rowspan="2" | Projectile<br>Mass (kg)
−
! rowspan="2" | ''Fuse delay''
+
! rowspan="2" | Fuse delay<br>(m)
−
''in m:''
+
! rowspan="2" | Fuse sensitivity<br>(mm)
−
! rowspan="2" | ''Fuse sensitivity''
+
! rowspan="2" | Explosive Mass<br>(TNT equivalent) (g)
−
''in mm:''
+
! colspan="3" | Ricochet
−
! rowspan="2" | ''Explosive Mass in g<br /> (TNT equivalent):''
+
|-
−
! colspan="3" | ''Ricochet:''
+
! 0% !! 50% !! 100%
 
|-
 
|-
−
! 0%
+
| BR-471 || APHE || 795 || 25.00 || 1.2 || 19.0 || 246.4 || 47° || 60° || 65°
−
! 50%
 
−
! 100%
 
 
|-
 
|-
−
| BR-471 || APHE || 795 || 25 || 1.2 || 19 || 246.4 || 47° || 60° || 65°
+
| BR-471B || APHEBC || 795 || 25.00 || 1.2 || 19.0 || 246.4 || 48° || 63° || 71°
 
|-
 
|-
−
| BR-471B || APHEBC || 795 || 25 || 1.2 || 19 || 246.4 || 48° || 63° || 71°
+
| OF-471 || HE || 800 || 25.00 || 0.1 || 0.1 || 3,600 || 79° || 80° || 81°
−
|-
 
−
| OF-471 || HE || 800 || 25 || 0.1 || 0.1 || 3,600 || 79° || 80° || 81°
 
 
|-
 
|-
 
|}
 
|}
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! Visual<br>discrepancy
 
! Visual<br>discrepancy
 
|-
 
|-
−
| '''30''' || ''Projectiles''<br />''Propellants'' || 25&nbsp;''(+5)''<br /> 25&nbsp;''(+5)'' || 19&nbsp;''(+11)'' <br /> 19&nbsp;''(+11)'' || 13&nbsp;''(+17)''<br /> 17&nbsp;''(+13)'' || 7&nbsp;''(+23)''<br /> 9&nbsp;''(+21)'' || 1&nbsp;''(+29)''<br /> 1&nbsp;''(+29)'' || No  
+
| '''30''' || ''Projectiles''<br />''Propellants'' || 25&nbsp;''(+5)''<br /> 25&nbsp;''(+5)'' || 19&nbsp;''(+11)'' <br /> 19&nbsp;''(+11)'' || 13&nbsp;''(+17)''<br /> 17&nbsp;''(+13)'' || 7&nbsp;''(+23)''<br /> 9&nbsp;''(+21)'' || 1&nbsp;''(+29)''<br /> 1&nbsp;''(+29)'' || No
 
|-
 
|-
 
|}
 
|}
  
 
=== Machine guns ===
 
=== Machine guns ===
−
<!-- ''Offensive and anti-aircraft machine guns not only allow you to fight some aircraft but also are effective against lightly armoured vehicles. Evaluate machine guns and give recommendations on its use.'' The text within these arrows are not to be deleted -->
+
<!-- ''Offensive and anti-aircraft machine guns not only allow you to fight some aircraft but also are effective against lightly armoured vehicles. Evaluate machine guns and give recommendations on its use.'' -->
 
{{main|DShK (12.7 mm)}}
 
{{main|DShK (12.7 mm)}}
  
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! colspan="5" | [[DShK (12.7 mm)|12.7 mm DShK]]
 
! colspan="5" | [[DShK (12.7 mm)|12.7 mm DShK]]
 
|-
 
|-
−
! Mount
+
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
−
! Capacity (Belt)
 
−
! Fire rate
 
−
! Vertical
 
−
! Horizontal
 
 
|-
 
|-
−
| Pintle || 250 (50) || 600 shots/min || -5°/+85° || ±180°
+
| Pintle || 250 (50) || 600 || -5°/+85° || ±180°
 
|-
 
|-
 
|}
 
|}
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| I
 
| I
 
| Tracks
 
| Tracks
−
|  
+
|
−
| Parts
+
| Parts
−
| Horizontal Drive
+
| Horizontal Drive
 
|
 
|
 
|-
 
|-
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| BR-471B
 
| BR-471B
 
|-
 
|-
−
| III  
+
| III
 
| Filters
 
| Filters
 
|
 
|
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=== Pros and cons ===
 
=== Pros and cons ===
−
<!--Summarize 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:'''
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== History ==
 
== History ==
−
<!--''Describe the history of the creation and combat usage of the ground vehicle in more detail than in the introduction. If the historical reference turns out to be too big, 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></nowiki></code>, as well as adding them at the end of the article. This section may also include the vehicle's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== Encyclopedia Info ===</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).'' -->
 
===Development===
 
===Development===
 
When the [[ISU-152]] began production in 1943 with the large 152 mm ML-20S gun, production of the chassis and hull soon exceeded the supply of the ML-20S gun, which caused a decrease in the production of self-propelled guns for the Soviet military. It was determined to speed up self-propelled gun production, the ISU chassis were to be mounted with the 122 mm A-19S gun.  Work on this mounting already began before the supply issue in December 1943 at the Chelyabinsk Kirov Plant (ChKZ), which had a design team simply take the ISU-152 chassis and hull and only changing out the armament with the 122 mm gun, but this prototype - ''Object 242'' - was not immediately put into production despite successful testings. When the supply issue arose, the prototype was then adopted by the Soviet Defense Committee for increased production and also that the 122 mm gun had better accuracy against tanks than the 152 mm gun. The ISU armed with the 122 mm gun, designated the '''ISU-122''', began production in April 1944.
 
When the [[ISU-152]] began production in 1943 with the large 152 mm ML-20S gun, production of the chassis and hull soon exceeded the supply of the ML-20S gun, which caused a decrease in the production of self-propelled guns for the Soviet military. It was determined to speed up self-propelled gun production, the ISU chassis were to be mounted with the 122 mm A-19S gun.  Work on this mounting already began before the supply issue in December 1943 at the Chelyabinsk Kirov Plant (ChKZ), which had a design team simply take the ISU-152 chassis and hull and only changing out the armament with the 122 mm gun, but this prototype - ''Object 242'' - was not immediately put into production despite successful testings. When the supply issue arose, the prototype was then adopted by the Soviet Defense Committee for increased production and also that the 122 mm gun had better accuracy against tanks than the 152 mm gun. The ISU armed with the 122 mm gun, designated the '''ISU-122''', began production in April 1944.
Line 219: Line 202:
  
 
=== In-game description ===
 
=== In-game description ===
−
The ISU-122 SPG was created in 1943 based on the IS-1 with the 122 mm A-19 Mod. 1937 field cannon's tipping unit installed in its cabin. The cannon was mounted with an offset to the right from the hull's central axis. The driver's compartment was placed to the left of it. The weapon had a relatively low rate of fire, amounting to around 2.2 shots per minute. The barrel's length came to 46.3 calibres. Its armour-piercing round weighed 25 kg and had an 800 m/s muzzle velocity. Its ammunition load consisted of separately loaded shots. Its direct firing range came to 5,000 m, and its maximum range was 14,300 m.  
+
The ISU-122 SPG was created in 1943 based on the IS-1 with the 122 mm A-19 Mod. 1937 field cannon's tipping unit installed in its cabin. The cannon was mounted with an offset to the right from the hull's central axis. The driver's compartment was placed to the left of it. The weapon had a relatively low rate of fire, amounting to around 2.2 shots per minute. The barrel's length came to 46.3 calibres. Its armour-piercing round weighed 25 kg and had an 800 m/s muzzle velocity. Its ammunition load consisted of separately loaded shots. Its direct firing range came to 5,000 m, and its maximum range was 14,300 m.
  
 
The fighting compartment was also equipped with two 7.62 mm PPSh and PPS submachine guns with 1,491 rounds and 25 F-1 hand grenades. Starting from October 1944, a 12.7 mm DShK anti-aircraft machine gun was mounted on a bracket next to the commander's hatch. The machine gun had a 250 round ammunition complement. The crew consisted of four to five men. The crew housing in this vehicle was the same as in the ISU-152. Its armour protection was also the same as on the ISU-152. The cannon's gun mantlet had 100 mm thick armour.
 
The fighting compartment was also equipped with two 7.62 mm PPSh and PPS submachine guns with 1,491 rounds and 25 F-1 hand grenades. Starting from October 1944, a 12.7 mm DShK anti-aircraft machine gun was mounted on a bracket next to the commander's hatch. The machine gun had a 250 round ammunition complement. The crew consisted of four to five men. The crew housing in this vehicle was the same as in the ISU-152. Its armour protection was also the same as on the ISU-152. The cannon's gun mantlet had 100 mm thick armour.
  
−
The vehicle was mass-produced from April 1944 to September 1945 at the ChKZ factory in Chelyabinsk. In total, 1,735 of them were made.  
+
The vehicle was mass-produced from April 1944 to September 1945 at the ChKZ factory in Chelyabinsk. In total, 1,735 of them were made.
−
The new SPGs were widely used in battles as tank destroyers and assault weapons in the final stage of the Great Patriotic War.  
+
 
 +
The new SPGs were widely used in battles as tank destroyers and assault weapons in the final stage of the Great Patriotic War.
 +
 
 
The long barrel length of the A-19 cannon installed in the fore of the armoured cabin limited the vehicle's manoeuvrability.
 
The long barrel length of the A-19 cannon installed in the fore of the armoured cabin limited the vehicle's manoeuvrability.
 +
 
A small number of ISU-122s were modernised in 1958. Only their sights and radio sets underwent modernisation. At the beginning of the 1960s, the SPGs were removed from service in the Soviet Army.
 
A small number of ISU-122s were modernised in 1958. Only their sights and radio sets underwent modernisation. At the beginning of the 1960s, the SPGs were removed from service in the Soviet Army.
  
 
== Media ==
 
== 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.'' -->
 
Skin and Camouflages for the [https://live.warthunder.com/feed/camouflages/?vehicleCountry=ussr&vehicleType=tank&vehicleClass=tank_destroyer&vehicle=ussr_isu_122 ISU-122] in Warthunder Live.
 
Skin and Camouflages for the [https://live.warthunder.com/feed/camouflages/?vehicleCountry=ussr&vehicleType=tank&vehicleClass=tank_destroyer&vehicle=ussr_isu_122 ISU-122] in Warthunder Live.
  
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== 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;''
 
* ''encyclopedia page on the tank;''
 
* ''encyclopedia page on the tank;''
−
* ''other literature.''-->
+
* ''other literature.'' -->
−
* [[Wikipedia:ISU-122|[Wikipedia<nowiki>]</nowiki> ISU-122]]
+
* [[Wikipedia:ISU-122|[Wikipedia] ISU-122]]
  
 
{{USSR tank destroyers}}
 
{{USSR tank destroyers}}

Revision as of 21:56, 24 June 2020

Introducing Wiki 3.0
ISU-122
ussr_isu_122.png
ISU-122
USSR flag.png USSR
III Rank
Battle rating:
AB RB SB
5.3 5.3 5.3
Class:
Research:20 000 Specs-Card-Exp.png
Purchase:135 000 Specs-Card-Lion.png
This page is about the Soviet tank destroyer ISU-122. For the version equipped with a D-25S cannon, see ISU-122S.

Description

GarageImage ISU-122.jpg


The ISU-122 is a rank III Soviet tank destroyer with a battle rating of 5.3 (AB/RB/SB). It was introduced during the Closed Beta Test for Ground Forces before Update 1.41.

General info

Survivability and armour

Armour type:

  • Rolled homogeneous armour
  • Cast homogeneous armour (Gun mantlet)
Armour Front Sides Rear Roof
Hull 60 mm (75°) Front glacis
90 mm (31°) Lower glacis 		90 mm 60 mm (50°) Top
60 mm (39°) Bottom 		30 mm
Superstructure 90 mm (30°) Front glacis
65 mm (7-69°) Gun mantlet case
100 mm Gun mantlet (0-45°) 		75 mm (14-15°) 60 mm 30 mm

Notes:

  • Suspension wheels are 20 mm thick while tracks are 30 mm thick.

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 39 15 46 739 992 16.07 21.57
Realistic 36 14 460 520 10 11.3

Armaments

Main armament

Main article: A-19 (122 mm)
122 mm A-19 Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 30 -3°/+22° -3°/+7° N/A 6.16 8.53 __.__ __.__ 12.19 26.00 _.__ _.__ 20.00
Realistic 4.17 4.90 __.__ __.__ 7.00

Ammunition

The available choice of ammunition focuses on heavily armoured targets:

  • BR-471: APHE; an armour-piercing shell with high explosive mass and high muzzle velocity that will one-shot any tank that it penetrates.
  • BR-471B: APHEBC; the same as the BR-471 but with increased penetration thanks to the ballistic cap. This shell can reliably penetrate the frontal glacis of a Panther from over 700m.
  • OF-471: HE; for destroying open and lightly armoured vehicles. While it is a standard shell for a Soviet vehicle, prioritize using your heavy machine gun to deal with lightly armoured targets because of the long reload time of the ISU-122.
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
BR-471 APHE 205 201 183 162 144 128
BR-471B APHEBC 205 203 191 178 166 155
OF-471 HE 37 37 37 37 37 37
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%
BR-471 APHE 795 25.00 1.2 19.0 246.4 47° 60° 65°
BR-471B APHEBC 795 25.00 1.2 19.0 246.4 48° 63° 71°
OF-471 HE 800 25.00 0.1 0.1 3,600 79° 80° 81°

Ammo racks

Full
ammo 		Ammo
type 		1st
rack empty 		2nd
rack empty 		3rd
rack empty 		4th
rack empty 		5th
rack empty 		Visual
discrepancy
30 Projectiles
Propellants 		25 (+5)
25 (+5) 		19 (+11)
19 (+11) 		13 (+17)
17 (+13) 		7 (+23)
9 (+21) 		1 (+29)
1 (+29) 		No

Machine guns

Main article: DShK (12.7 mm)

The 12.7 mm DShK heavy machine gun is located on a pintle mount and can act as both an offensive and anti-aircraft machine gun on the ISU-122, giving it protection against aircraft and lightly armoured vehicles. Best use is within 500 m against lightly armoured vehicles. The 360° movement allows you to point quickly your MG in any given direction. However, the position of the MG high on the casemate and the poor depression angle make it difficult to shoot a low-profile tank when it is close.

12.7 mm DShK
Mount Capacity (Belt) Fire rate Vertical Horizontal
Pintle 250 (50) 600 -5°/+85° ±180°

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).

Modules

Tier Mobility Protection Firepower
I Tracks Parts Horizontal Drive
II Suspension Brake System FPE Adjustment of Fire BR-471B
III Filters Crew Replenishment Elevation Mechanism
IV Transmission Engine

Pros and cons

Pros:

  • Powerful cannon, can penetrate the majority of enemies it faces
  • Great post-penetration damage
  • No armour weak spots
  • Good acceleration in reverse allows you to hide quickly

Cons:

  • Slow reload
  • Armour cannot stop most common cannons and penetrations are often lethal
  • Like most Tank Destroyers, it lacks a turret and so its firing angles are restricted
  • Breech gets damaged often
  • Slow traverse means flanking attacks are lethal

History

Development

When the ISU-152 began production in 1943 with the large 152 mm ML-20S gun, production of the chassis and hull soon exceeded the supply of the ML-20S gun, which caused a decrease in the production of self-propelled guns for the Soviet military. It was determined to speed up self-propelled gun production, the ISU chassis were to be mounted with the 122 mm A-19S gun. Work on this mounting already began before the supply issue in December 1943 at the Chelyabinsk Kirov Plant (ChKZ), which had a design team simply take the ISU-152 chassis and hull and only changing out the armament with the 122 mm gun, but this prototype - Object 242 - was not immediately put into production despite successful testings. When the supply issue arose, the prototype was then adopted by the Soviet Defense Committee for increased production and also that the 122 mm gun had better accuracy against tanks than the 152 mm gun. The ISU armed with the 122 mm gun, designated the ISU-122, began production in April 1944.

Upgrade

The original ISU-122 is equipped with the 122 mm A-19S gun, which had a firing rate of 1.5 to 2.5 shots per minute due to its manual-piston breech. An attempt to fix this was a modernized A-19 gun called the D-25. The D-25 didn't see instalment onto the ISU-122 for a while due to prioritization on the IS-2 tanks, but it was available for use on self-propelled mounts after September 1944 as the D-25S. The ISU-122 prototype mounting the D-25 gun was called Object 249 which was successfully tested and an improvement over the A-19 gun with an increased firing rate of 2 to 3 shots per minute with one loader and up to 4 shots per minute with an additional loader in the crew. The D-25 also exploited the use of a muzzle brake in order to reduce the recoil forces on the gun, so the recoil buffer on the D-25 was much smaller than the A-19, which helped reduce the size of the gun and improved crew workspace in the self-propelled gun. Object 249 was then adopted as the ISU-122S, which entered production side by side with the ISU-122 u and both were produced up until the end of 1945. ChKZ produced both vehicles during the war and manufactured 1,735 ISU-122s (April 1944 - December 1945) and 675 ISU-122Ss (September 1944 - December 1945).

Combat usage

The ISU-122 were organized in units in a similar fashion as the ISU-152. The focus was made to not mix the two vehicles in the same regiments or brigades due to logistical reasons with ammunition and ballistic differences in indirect fire, but some units were equipped with both vehicles anyways. Like the ISU-152, the ISU-122 proved to be a very powerful multi-purpose vehicle as an assault gun, self-propelled artillery, and tank destroyer. The 122 mm gun on the ISU-122 allowed it to engage armour and fortifications with heavy armour-piercing round and a large high-explosive round. The primary role of the ISU-122 was as a tank destroyer due to the gun's superior ballistics compared to the ISU-152's, which large calibre size more suited its role as an assault gun. The ISU-122 did participate as an assault gun role in urban combat to support the infantry, but the lack of rotating turret and long barrel length restricted its manoeuvring and ability to engage all enemies in a large angle. Nevertheless, commanders found the ISU-122 as a very good assault gun. Usage of the ISU-122 in an indirect firing role as a howitzer is rare, but when used could fire up to 14 kilometres away. Usage as an artillery piece is more likely during a rapid offensive where towed artillery behind the lines is unable to keep up with the advancing infantry lines.

In-game description

The ISU-122 SPG was created in 1943 based on the IS-1 with the 122 mm A-19 Mod. 1937 field cannon's tipping unit installed in its cabin. The cannon was mounted with an offset to the right from the hull's central axis. The driver's compartment was placed to the left of it. The weapon had a relatively low rate of fire, amounting to around 2.2 shots per minute. The barrel's length came to 46.3 calibres. Its armour-piercing round weighed 25 kg and had an 800 m/s muzzle velocity. Its ammunition load consisted of separately loaded shots. Its direct firing range came to 5,000 m, and its maximum range was 14,300 m.

The fighting compartment was also equipped with two 7.62 mm PPSh and PPS submachine guns with 1,491 rounds and 25 F-1 hand grenades. Starting from October 1944, a 12.7 mm DShK anti-aircraft machine gun was mounted on a bracket next to the commander's hatch. The machine gun had a 250 round ammunition complement. The crew consisted of four to five men. The crew housing in this vehicle was the same as in the ISU-152. Its armour protection was also the same as on the ISU-152. The cannon's gun mantlet had 100 mm thick armour.

The vehicle was mass-produced from April 1944 to September 1945 at the ChKZ factory in Chelyabinsk. In total, 1,735 of them were made.

The new SPGs were widely used in battles as tank destroyers and assault weapons in the final stage of the Great Patriotic War.

The long barrel length of the A-19 cannon installed in the fore of the armoured cabin limited the vehicle's manoeuvrability.

A small number of ISU-122s were modernised in 1958. Only their sights and radio sets underwent modernisation. At the beginning of the 1960s, the SPGs were removed from service in the Soviet Army.

Media

Skin and Camouflages for the ISU-122 in Warthunder Live.

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


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

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