Difference between revisions of "IS-4M"

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== Description ==
 
== Description ==
''In the description, the first part needs to 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 the screenshot of the vehicle. If the novice player does not remember the vehicle by name, they will immediately understand what kind of vehicle it is talking about.''
+
<!--''In the description, the first part needs to 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 the screenshot of the vehicle. If the novice player does not remember the vehicle by name, they will immediately understand what kind of vehicle it is talking about.''-->
 +
[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
 +
{{break}}
 +
The '''{{Specs|name}}''' is a rank {{Specs|rank}} Soviet heavy tank {{Battle-rating}}. It was introduced during the closed beta testing 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 helpfull 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:'''
 +
 
 +
* Rolled homogeneous armour (Hull, Turret roof, Hatch roof)
 +
* Cast homogeneous armour (Turret)
 +
 
 +
{| class="wikitable"
 +
|-
 +
! Armour !! Front !! Sides !! Rear !! Roof
 +
|-
 +
| Hull || 140 mm (62°) ''Front glacis'' <br> 160 mm (40°) ''Lower glacis'' <br> 160 mm (34-77°) ''Driver's port'' <br> 40 mm (44-87°) ''Top of Driver's port''|| 160 mm (30-53°) ''Top'' <br> 160 mm ''Middle'' <br> 30 mm (61°) ''Bottom'' || 100 mm (37°) ''Top'' <br> 30 mm (80°) ''Middle'' <br> 100 mm (31-39°) ''Bottom'' || 30 mm
 +
|-
 +
| Turret || 200-250 mm (2-89°) ''Turret front'' <br> 200 mm (0-65°) , 170 + 250 mm (2-61°) ''Gun mantlet''  || 200 mm (3-40°) || 150 (62-72°) ''Top'' <br>  170 mm (21-49°) ''Bottom'' || 30 mm ''Front, Hatch roof, Ventilators'' <br> 50 mm ''Front sides'' <br> 170 mm ''Center''
 +
|-
 +
|}
 +
'''Notes:'''
 +
 
 +
* Suspension wheels are 20 mm thick, torsion bars are 10 mm thick, and tracks are 30 mm thick.
  
 
=== Mobility ===
 
=== Mobility ===
''Write about the mobility of the ground vehicle. Estimate the specific power and maneuverability as well as the maximum speed forward and backward.''
+
<!--''Write about the mobility of the ground vehicle. Estimate the specific power and maneuverability as well as the maximum speed forward and backward.''-->
 +
{| class="wikitable" style="text-align:center"
 +
|-
 +
! colspan="3" | Mobility characteristic
 +
|-
 +
! Weight (tons)
 +
! colspan="1" | Add-on Armour<br>weight (tons)
 +
! colspan="1" | Max speed (km/h)
 +
|-
 +
| rowspan="2" | 60.0 || colspan="1" rowspan="2" | N/A || colspan="1" | 45 (AB)
 +
|-
 +
|43 (RB/SB)
 +
|-
 +
! colspan="3" | Engine power (horsepower)
 +
|-
 +
! colspan="1" | Mode
 +
!Stock
 +
!Upgraded
 +
|-
 +
|''Arcade''
 +
|968
 +
|___
 +
|-
 +
|''Realistic/Simulator''
 +
|663
 +
|750
 +
|-
 +
! colspan="3" | Power-to-weight ratio (hp/ton)
 +
|-
 +
! colspan="1" | Mode
 +
!Stock
 +
!Upgraded
 +
|-
 +
|''Arcade''
 +
|16.13
 +
|__.__
 +
|-
 +
|''Realistic/Simulator''
 +
|11.05
 +
|12.50
 +
|-
 +
|}
  
 
== 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 flexibilty 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|D-25T (122 mm)}}
  
=== Additional armament ===
+
{| class="wikitable" style="text-align:center"
''Some tanks are armed with several guns in one or more turrets. Evaluate the additional weaponry and give advice on its use. Describe the ammunition available for additional weaponry. Give advice on how to use them and how to fill the ammunition storage. If there is no additional weaponry remove this subsection.''
+
|-
 +
! colspan="6" | [[D-25T (122 mm)|122 mm D-25T]]
 +
|-
 +
! colspan="3" rowspan="1" style="width:5em" |Capacity
 +
! rowspan="1" | Vertical <br> guidance
 +
! rowspan="1" | Horizontal <br> guidance
 +
! rowspan="1" | Stabilizer
 +
|-
 +
| colspan="3" | 30 || -3°/+19° || ±180° || N/A
 +
|-
 +
! colspan="6" | Turret rotation speed (°/s)
 +
|-
 +
! style="width:4em" |Mode
 +
! style="width:4em" |Stock
 +
! style="width:4em" |Upgraded
 +
! style="width:4em" |Prior + Full crew
 +
! style="width:4em" |Prior + Expert qualif.
 +
! style="width:4em" |Prior + Ace qualif.
 +
|-
 +
| ''Arcade'' ||9.4||13.0|| __.__ || __.__ || __.__
 +
|-
 +
| ''Realistic'' ||6.9||8.1|| __.__ || __.__ || __.__
 +
|-
 +
! colspan="4" | Reloading rate (seconds)
 +
|-
 +
! colspan="1" style="width:4em" |Stock
 +
! colspan="1" style="width:4em" |Prior + Full crew
 +
! colspan="1" style="width:4em" |Prior + Expert qualif.
 +
! colspan="1" style="width:4em" |Prior + Ace qualif.
 +
|-
 +
| 27.1 || __.__ || __.__ || 20.8
 +
|-
 +
|}
 +
 
 +
===== Ammunition =====
 +
{| class="wikitable sortable" style="text-align:center" width="100%"
 +
! colspan="8" | Penetration statistics
 +
|-
 +
! rowspan="2" data-sort-type="text" | Ammunition
 +
! rowspan="2" class="unsortable" | Type of <br /> warhead
 +
! colspan="6" | '''Penetration''' '''''in mm''''' '''@ 90°'''
 +
|-
 +
! 10m
 +
! 100m
 +
! 500m
 +
! 1000m
 +
! 1500m
 +
! 2000m
 +
|-
 +
| BR-471 || APHE || 204 || 200 || 182 || 162 || 144 || 128
 +
|-
 +
| BR-471B || APHEBC || 205 || 202 || 191 || 178 || 165 || 154
 +
|-
 +
| BR-471D || APCBC|| 229 || 227 || 214 || 199 || 186 || 173
 +
|-
 +
| OF-471 || HE || 45 || 45 || 44 || 43 || 42 || 42
 +
|-
 +
|}
 +
{| class="wikitable sortable" style="text-align:center" width="100%"
 +
! colspan="11" | Shell details
 +
|-
 +
! rowspan="2" data-sort-type="text" | Ammunition
 +
! rowspan="2" class="unsortable" | Type of <br /> warhead
 +
! rowspan="2" |Velocity <br /> in m/s
 +
! rowspan="2" |Projectile<br />Mass in kg
 +
! rowspan="2" | ''Fuse delay''
 +
''in m:''
 +
! rowspan="2" | ''Fuse sensitivity''
 +
''in mm:''
 +
! rowspan="2" | ''Explosive Mass in g<br /> (TNT equivalent):''
 +
! rowspan="2" | ''Normalization At 30° <br> from horizontal:''
 +
! colspan="3" | ''Ricochet:''
 +
|-
 +
! 0%
 +
! 50%
 +
! 100%
 +
|-
 +
| BR-471 || APHE || 795 || 25 || 1.2 || 15 || 272 || -1° || 47° || 60° || 65°
 +
|-
 +
| BR-471B || APHEBC || 795 || 25 || 1.2 || 15 || 272 || +4° || 48° || 63° || 71°
 +
|-
 +
| BR-471D || APCBC || 800 || 25 || 1.2 || 15 || 212.5 || +4° || 48° || 63° || 71°
 +
|-
 +
| OF-471 || HE || 800 || 25 || 0.1 || 0.1 || 3,600 || +0° || 79° || 80° || 81°
 +
|-
 +
|}
 +
 
 +
===== [[Ammo racks|Ammo racks]] =====
 +
[[File:Ammoracks_{{PAGENAME}}.png|right|thumbnail|x250px|Ammo racks of the {{PAGENAME}}.]]
 +
{| class="wikitable sortable" style="text-align:center"
 +
|-
 +
! class="wikitable unsortable" |Full<br /> ammo
 +
! class="wikitable unsortable" |Ammo<br />Part
 +
! class="wikitable unsortable" |1st<br />  rack empty
 +
! class="wikitable unsortable" |2nd<br />  rack empty
 +
! class="wikitable unsortable" |3rd<br />  rack empty
 +
! class="wikitable unsortable" |4th<br />  rack empty
 +
! class="wikitable unsortable" |5th<br />  rack empty
 +
! class="wikitable unsortable" |6th<br />  rack empty
 +
! class="wikitable unsortable" |Visual<br /> discrepancy
 +
|-
 +
|| '''30''' || style="text-align:right" | ''Projectiles''<br />''Propellants'' || 29&nbsp;''(+1)''<br />29&nbsp;''(+1)'' || 24&nbsp;''(+6)''<br />24&nbsp;''(+6)'' || 19&nbsp;''(+11)''<br />19&nbsp;''(+11)'' || 14&nbsp;''(+16)''<br />14&nbsp;''(+16)'' || 9&nbsp;''(+21)''<br />9&nbsp;''(+21)'' || 1&nbsp;''(+29)''<br />1&nbsp;''(+29)'' || style="text-align:left" | 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.''
+
<!--''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)}}
  
== Usage in the battles ==
+
{| class="wikitable" style="text-align:center"
 +
|-
 +
! colspan="7" | [[DShK (12.7 mm)|12.7 mm DShK]]
 +
|-
 +
! colspan="7" | ''Pintle mount''
 +
|-
 +
! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
 +
! rowspan="1" | Fire rate <br> (shots/minute)
 +
! rowspan="1" | Vertical <br> guidance
 +
! rowspan="1" | Horizontal <br> guidance
 +
|-
 +
| colspan="4" | 250 (50) || 600 || -10°/+60° || ±180°
 +
|-
 +
! colspan="7" | ''Coaxial mount''
 +
|-
 +
! colspan="4" rowspan="1" style="width:5em" |Capacity (Belt capacity)
 +
! rowspan="1" | Fire rate <br> (shots/minute)
 +
! rowspan="1" | Vertical <br> guidance
 +
! rowspan="1" | Horizontal <br> guidance
 +
|-
 +
| colspan="4" | 1,000 (50) || 600 || N/A || N/A
 +
|-
 +
|}
 +
 
 +
== 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 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).''
 
''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 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).''
  
 
=== 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. Do not use more than 6 points for each of the characteristics. Avoid using categorical definitions such as "bad", "good" and the like - they have a substitution in the form of softer "inadequate", "effective".''
+
<!--''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 - they have a substitution in the form of softer "inadequate", "effective".''-->
 +
 
 +
'''Pros:'''  
  
'''Pros:'''
+
* Very good frontal armour; can even bounce 128 mm shells from the Maus.
*
+
* Retains the powerful D-25T 122mm gun as on the previous IS-2 and IS-3
 +
* The mere presence of an IS-4 can make enemies panic or run and hide.
 +
* Slightly wider choices of ammo compared to the IS-2 and IS-3.
  
 
'''Cons:'''
 
'''Cons:'''
*
 
  
== Historical part ==
+
* Can - and will - be a priority target for the enemy team due to its fearsome reputation
''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 an article about the vehicle and adding a block "/historical reference" (example: https://wiki.warthunder.com/Name-vehicles/historical reference) and add a link to it here using the <code>main</code> template. Be sure to include links to sources at the end of the article.''
+
* Long reload of 20 seconds
 +
* Ammo rack in the back of the turret; if a shell penetrates, the ammo could detonate.
 +
 
 +
== 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 an 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.''-->
 +
===Development===
 +
During the development of the [[IS-3]] in 1944 under General Nikolai Dukhov, a separate project was underway by a design team led by L.S. Troyanov to improve the [[IS-2 (1944)|IS-2]] design. This separate project commenced under the designation ''Object 701''. The project produced three proposed design. The ''Object 701-2'' with a S-34 100 mm gun, ''701-5'' with a different armour configuration, and the ''701-6'' with the 122 mm D-25 gun. The ''701-6'' was accepted for further development, to which was modified with thicker armour, longer hull, and a more powerful engine. There was some implementation of German designs into the prototype; the engine has a cooling system that uses a pair of circular fans on the engine deck, a feature also is seen on the [[Panther A|Panther tank]].<ref name="ZalogaIS">Zaloga Steven. ''IS-2 Heavy Tank 1944-73'' Great Britain: Osprey Publishing Ltd., 1994</ref>
 +
 
 +
===Usage===
 +
''Object 701'' was eventually approved for production in 1947 as the '''IS-4'''. The production turned out 200 tanks (some sources say 250) before the production was halted. The reason being that the IS-4 was criticized for being inadequate in mobility despite its new engine.<ref name="ZalogaIS" /> While production ended, the remaining IS-4 still saw service in the Soviet Union. When the Korean War broke out in 1950 and the United States and its allies got involved, the IS-4s were all shipped to the Far East of the Soviet Union in anticipation of Soviet intervention in the Korean War. They were not committed despite pressure by the Chinese from fear of inciting another world war. Even so, the IS-4 stayed in the region ready for action. In the late 1950s, the IS-4 underwent a modernization program along the lines of the IS-3 with increased ammo stowage, new machine gun armaments, new gun optics, better engine, and better filtration system and this modernized variant was named the '''IS-4M'''.<ref name="ZalogaIS" /> The IS-4 stayed in service in the Soviet Union until the 1960s.
 +
 
 +
===Legacy===
 +
The IS-4, as a relatively unsuccessful Soviet tank, faded to obscurity with little information on it passed its development period. It was the heaviest of the Soviet heavy tanks that were slated for production. The IS-4's design was further developed on in the IS tank family with the ''Object 703'', with the design using an electrical transmission instead of a mechanical one. This vehicle redesignated the ''[[IS-6]]'', also proved to be problematic and was shelved.<ref name="ZalogaIS" />
 +
 
 +
=== In-game description ===
 +
Development of this tank began in July 1943 at the ChKZ factory. The main impetus for creating a new Soviet heavy tank was the prospect of being able to install more powerful artillery on it than what was installed on the IS-2. The vehicle underwent testing until the autumn of 1944. The new vehicle had one inarguable virtue - no tank or anti-tank cannon of Soviet or German make could penetrate its 160 mm frontal armour. At the end of 1944, two more vehicles equipped with modernised transmission were produced.
 +
 
 +
In April 1945, the tank was put into service and mass-produced under the designation IS-4. The vehicle's hull was fully welded, while its turret was cast with tapering armour thickness. Along with its 122 mm D-25T cannon, it was also armed with a coaxial 12.7 mm machine gun. An identical machine gun was placed as an anti-aircraft gun on a ring mount above the loader's hatch. One of the vehicle's characteristic features was its original ammunition rack, in which shells were housed in special metal canisters. The tank had epicyclic transmission and individual torsion-bar suspension. The crew consisted of 4 people. The vehicle's powertrain was a 750 hp B-12 diesel engine. With this engine, the tank could reach 43 km/h on-road.
 +
 
 +
The IS-4 was mass-produced until 1949. In total, around 250 of them were made. These vehicles served in the Far East.
 +
 
 +
It became clear during its deployment that the tank's mass exceeded the carrying capacity of most bridges and transport platforms. It was this fact that effectively buried the idea of building vehicles with a mass greater than 50 tonnes. The IS-4 was taken out of operation and placed in long-term storage, and then withdrawn from service entirely. After this, it was often used on ballistic ranges as a target.
  
 
== Media ==
 
== Media ==
''An excellent addition to the article will be video guides, as well as screenshots from the game and photos.''
+
<!--''An excellent addition to the article will be video guides, as well as screenshots from the game and photos.''-->
 +
[http://live.warthunder.com/feed/camouflages/?q=%23is4 Camouflages and skins for the IS-4 from live.warthunder.com]
 +
 
 +
==References==
 +
<references />
 +
 
 +
== See also ==
 +
''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
  
== Read 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;''
 
* ''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.''
''ETC.''
 
  
== Sources ==
+
== 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;''
* ''page on the Wikipedia;''
+
* ''encyclopedia page on tank;''
 
* ''other literature.''
 
* ''other literature.''
 +
 +
{{USSR heavy tanks}}

Revision as of 11:06, 22 May 2019

IS-4M
ussr_is_4m.png
AB
RB
SB
General characteristics
Brief
Detailed
7.7/7.7/7.7BR
4 peopleCrew
87 %Visibility
front / side / backArmour
140 / 160 / 100Hull
250 / 200 / 170Turret
Mobility
60.0 tWeight
1 431 hp750 hpEngine power
24 hp/t13 hp/tSurface density
45 km/h forward
11 km/h back
42 km/h forward
10 km/h back
Speed
Armament
122 mm D-25T cannonMain weapon
30 roundsAmmunition
20.8 / 27.1 sReload
-3° / 19°Vertical guidance
12.7 mm DShK machine gunMachinegun
250 roundsAmmunition
8.0 / 10.4 sReload
50 roundsBelt capacity
600 shots/minFire rate
-10° / 60°Vertical guidance
12.7 mm DShK machine gunCoaxial weapon
1 000 roundsAmmunition
8.0 / 10.4 sReload
50 roundsBelt capacity
600 shots/minFire rate
Economy
170 000 Rp icon.pngResearch
440 000 Sl icon.pngPurchase
Sl icon.png10 800 / 14 158/6 380 / 8 364/4 280 / 5 611Repair
130 000 Sl icon.pngCrew training
440 000 Sl icon.pngExperts
1 400 Ge icon.pngAces
× (208) % Rp icon.pngReward for battle
× 1.8 Sl icon.png× 1.5 Sl icon.png× 1.4 Sl icon.png

Description

GarageImage IS-4M.jpg


The IS-4M is a rank V Soviet heavy tank with a battle rating of 7.7 (AB/RB/SB). It was introduced during the closed beta testing for Ground Forces before Update 1.41.

General info

Survivability and armour

Armour type:

  • Rolled homogeneous armour (Hull, Turret roof, Hatch roof)
  • Cast homogeneous armour (Turret)
Armour Front Sides Rear Roof
Hull 140 mm (62°) Front glacis
160 mm (40°) Lower glacis
160 mm (34-77°) Driver's port
40 mm (44-87°) Top of Driver's port
160 mm (30-53°) Top
160 mm Middle
30 mm (61°) Bottom
100 mm (37°) Top
30 mm (80°) Middle
100 mm (31-39°) Bottom
30 mm
Turret 200-250 mm (2-89°) Turret front
200 mm (0-65°) , 170 + 250 mm (2-61°) Gun mantlet
200 mm (3-40°) 150 (62-72°) Top
170 mm (21-49°) Bottom
30 mm Front, Hatch roof, Ventilators
50 mm Front sides
170 mm Center

Notes:

  • Suspension wheels are 20 mm thick, torsion bars are 10 mm thick, and tracks are 30 mm thick.

Mobility

Mobility characteristic
Weight (tons) Add-on Armour
weight (tons)
Max speed (km/h)
60.0 N/A 45 (AB)
43 (RB/SB)
Engine power (horsepower)
Mode Stock Upgraded
Arcade 968 ___
Realistic/Simulator 663 750
Power-to-weight ratio (hp/ton)
Mode Stock Upgraded
Arcade 16.13 __.__
Realistic/Simulator 11.05 12.50

Armaments

Main armament

Main article: D-25T (122 mm)
122 mm D-25T
Capacity Vertical
guidance
Horizontal
guidance
Stabilizer
30 -3°/+19° ±180° N/A
Turret rotation speed (°/s)
Mode Stock Upgraded Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
Arcade 9.4 13.0 __.__ __.__ __.__
Realistic 6.9 8.1 __.__ __.__ __.__
Reloading rate (seconds)
Stock Prior + Full crew Prior + Expert qualif. Prior + Ace qualif.
27.1 __.__ __.__ 20.8
Ammunition
Penetration statistics
Ammunition Type of
warhead
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
BR-471 APHE 204 200 182 162 144 128
BR-471B APHEBC 205 202 191 178 165 154
BR-471D APCBC 229 227 214 199 186 173
OF-471 HE 45 45 44 43 42 42
Shell details
Ammunition Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
Ricochet:
0% 50% 100%
BR-471 APHE 795 25 1.2 15 272 -1° 47° 60° 65°
BR-471B APHEBC 795 25 1.2 15 272 +4° 48° 63° 71°
BR-471D APCBC 800 25 1.2 15 212.5 +4° 48° 63° 71°
OF-471 HE 800 25 0.1 0.1 3,600 +0° 79° 80° 81°
Ammo racks
Ammo racks of the IS-4M.
Full
ammo
Ammo
Part
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
6th
rack empty
Visual
discrepancy
30 Projectiles
Propellants
29 (+1)
29 (+1)
24 (+6)
24 (+6)
19 (+11)
19 (+11)
14 (+16)
14 (+16)
(+21)
(+21)
(+29)
(+29)
no

Machine guns

Main article: DShK (12.7 mm)
12.7 mm DShK
Pintle mount
Capacity (Belt capacity) Fire rate
(shots/minute)
Vertical
guidance
Horizontal
guidance
250 (50) 600 -10°/+60° ±180°
Coaxial mount
Capacity (Belt capacity) Fire rate
(shots/minute)
Vertical
guidance
Horizontal
guidance
1,000 (50) 600 N/A N/A

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 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).

Pros and cons

Pros:

  • Very good frontal armour; can even bounce 128 mm shells from the Maus.
  • Retains the powerful D-25T 122mm gun as on the previous IS-2 and IS-3
  • The mere presence of an IS-4 can make enemies panic or run and hide.
  • Slightly wider choices of ammo compared to the IS-2 and IS-3.

Cons:

  • Can - and will - be a priority target for the enemy team due to its fearsome reputation
  • Long reload of 20 seconds
  • Ammo rack in the back of the turret; if a shell penetrates, the ammo could detonate.

History

Development

During the development of the IS-3 in 1944 under General Nikolai Dukhov, a separate project was underway by a design team led by L.S. Troyanov to improve the IS-2 design. This separate project commenced under the designation Object 701. The project produced three proposed design. The Object 701-2 with a S-34 100 mm gun, 701-5 with a different armour configuration, and the 701-6 with the 122 mm D-25 gun. The 701-6 was accepted for further development, to which was modified with thicker armour, longer hull, and a more powerful engine. There was some implementation of German designs into the prototype; the engine has a cooling system that uses a pair of circular fans on the engine deck, a feature also is seen on the Panther tank.[1]

Usage

Object 701 was eventually approved for production in 1947 as the IS-4. The production turned out 200 tanks (some sources say 250) before the production was halted. The reason being that the IS-4 was criticized for being inadequate in mobility despite its new engine.[1] While production ended, the remaining IS-4 still saw service in the Soviet Union. When the Korean War broke out in 1950 and the United States and its allies got involved, the IS-4s were all shipped to the Far East of the Soviet Union in anticipation of Soviet intervention in the Korean War. They were not committed despite pressure by the Chinese from fear of inciting another world war. Even so, the IS-4 stayed in the region ready for action. In the late 1950s, the IS-4 underwent a modernization program along the lines of the IS-3 with increased ammo stowage, new machine gun armaments, new gun optics, better engine, and better filtration system and this modernized variant was named the IS-4M.[1] The IS-4 stayed in service in the Soviet Union until the 1960s.

Legacy

The IS-4, as a relatively unsuccessful Soviet tank, faded to obscurity with little information on it passed its development period. It was the heaviest of the Soviet heavy tanks that were slated for production. The IS-4's design was further developed on in the IS tank family with the Object 703, with the design using an electrical transmission instead of a mechanical one. This vehicle redesignated the IS-6, also proved to be problematic and was shelved.[1]

In-game description

Development of this tank began in July 1943 at the ChKZ factory. The main impetus for creating a new Soviet heavy tank was the prospect of being able to install more powerful artillery on it than what was installed on the IS-2. The vehicle underwent testing until the autumn of 1944. The new vehicle had one inarguable virtue - no tank or anti-tank cannon of Soviet or German make could penetrate its 160 mm frontal armour. At the end of 1944, two more vehicles equipped with modernised transmission were produced.

In April 1945, the tank was put into service and mass-produced under the designation IS-4. The vehicle's hull was fully welded, while its turret was cast with tapering armour thickness. Along with its 122 mm D-25T cannon, it was also armed with a coaxial 12.7 mm machine gun. An identical machine gun was placed as an anti-aircraft gun on a ring mount above the loader's hatch. One of the vehicle's characteristic features was its original ammunition rack, in which shells were housed in special metal canisters. The tank had epicyclic transmission and individual torsion-bar suspension. The crew consisted of 4 people. The vehicle's powertrain was a 750 hp B-12 diesel engine. With this engine, the tank could reach 43 km/h on-road.

The IS-4 was mass-produced until 1949. In total, around 250 of them were made. These vehicles served in the Far East.

It became clear during its deployment that the tank's mass exceeded the carrying capacity of most bridges and transport platforms. It was this fact that effectively buried the idea of building vehicles with a mass greater than 50 tonnes. The IS-4 was taken out of operation and placed in long-term storage, and then withdrawn from service entirely. After this, it was often used on ballistic ranges as a target.

Media

Camouflages and skins for the IS-4 from live.warthunder.com

References

  1. 1.0 1.1 1.2 1.3 Zaloga Steven. IS-2 Heavy Tank 1944-73 Great Britain: Osprey Publishing Ltd., 1994

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

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on tank;
  • other literature.


USSR heavy tanks
KV  KV-1 (L-11) · KV-1E · KV-1 (ZiS-5) · KV-1S · KV-85 · KV-122 · KV-220
  KV-2 (1939) · KV-2 (1940) · KV-2 (ZiS-6)
IS  IS-1 · IS-2 · IS-2 (1944) · IS-2 "Revenge for the Hero brother" · IS-3 · IS-4M · IS-6 · IS-7 · T-10M
Multi-towers  T-35 · SMK
Lend-Lease  ▂MK-II "Matilda"