Difference between revisions of "IS-6"

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m (Removed the section about the IS-6 not having the D variant of it's APHE, as currently in-game it has that shell)
 
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{{Specs-Card
 
{{Specs-Card
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|code = ussr_is_6
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|code=ussr_is_6
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|store = 5560
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|images={{Specs-Card-Image|GarageImage_{{PAGENAME}}.jpg}}
 +
|store=5560
 
}}
 
}}
  
 
== 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.'' -->
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[[File:GarageImage_{{PAGENAME}}.jpg|420px|thumb|left]]
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The '''IS-6''' is the fifth variant of the IS heavy tank family. It was never mass-produced and remained in the prototype stage. There was an effort to develop a replacement for the [[IS-2]] in the closing years of World War II ('The Great Patriotic War' to the Soviets). The IS-6 (Object 252/Object 253) and IS-4 (Object 701) were created as a result of the development process. This effort was highly classified, with two competing factories creating their designs in complete secrecy for fear of exposing knowledge to one another. On paper, the IS-6 appeared to be superior to any tank in Germany's inventory at the time. However, due to mechanical faults and generally poor performance, it was beaten by its competitor during test trials, the [[IS-4M|IS-4]], which entered service in 1946. Despite this, a last-ditch effort was made to improve the IS-6, with minimal success. The improved IS-6 would be known as the Object 252 November improvement, or simply the Object 252U.
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{{Break}}
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The '''{{Specs|name}}''' is a premium gift rank {{Specs|rank}} Soviet heavy tank {{Battle-rating}}. It was introduced in [[Update 1.67 "Assault"]]. This is one of the most dreaded tanks of its BR spread since it features a good cannon and awesome mobility packed inside a heavily sloped thick armour that most APHE shells cannot penetrate. Use this tank in any role and situation, it will surely find its place on the battlefield. Having very good mobility and a respectable reverse speed allows the IS-6 to plow through sticky situations that many other tanks would struggle with.
+
Introduced in [[Update 1.67 "Assault"]], the IS-6 is one of the most feared tanks in its ranks, thanks to its strong main armament and incredible mobility packed inside a steeply sloped, thick armour that most conventional ammunition cannot penetrate. This tank may be used in every role and situation, and it will undoubtedly find a place on the battlefield. The IS-6's excellent mobility and reasonable reverse speed allow it to navigate through challenging environments that many other tanks would struggle with. Players familiar with IS heavy tanks will be happy to learn that the IS-6 has superior manoeuvrability when compared to other variants.
  
 
== General info ==
 
== General info ==
 
=== Survivability and armour ===
 
=== Survivability and 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.'' -->
 
100 mm sloped at more or less 60­° on all sides provide this vehicle with a reputation to be a ''ricochet master''. Firing on the hull from almost any angle will only result in a glancing shot. The only weak spot being the lower sides of the hull and turret sides and rear, the only way to reliably penetrate it is to get a shot from the side. An attentive player that never shows the sides is an invincible opponent. However, be aware of the frontal armour, as the extremely angled turret armour encasing the cannon breech can create a shot trap and ricochet the shell into the driver's area. This will likely result in your ammo exploding. Be wary when facing any opponent.
 
100 mm sloped at more or less 60­° on all sides provide this vehicle with a reputation to be a ''ricochet master''. Firing on the hull from almost any angle will only result in a glancing shot. The only weak spot being the lower sides of the hull and turret sides and rear, the only way to reliably penetrate it is to get a shot from the side. An attentive player that never shows the sides is an invincible opponent. However, be aware of the frontal armour, as the extremely angled turret armour encasing the cannon breech can create a shot trap and ricochet the shell into the driver's area. This will likely result in your ammo exploding. Be wary when facing any opponent.
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*Spaced armour plates are placed on the sides, giving an additional 10 mm of side armour.
 
*Spaced armour plates are placed on the sides, giving an additional 10 mm of side armour.
  
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From the front, only high-end rounds (HEAT-FS, HESH, APFSDS) can penetrate the IS-6. Otherwise, flank it since its lower side armour is flat behind the tracks. In a close to medium range fight, if the IS-6 is static and facing you, try to shoot its right side turret cupola, a penetrating APHE shell may knock out the commander and gunner, disabling the tank (some large calibre rounds can even knock out the loader and/or driver, resulting in an instant elimination). This strategy is not applicable with rounds that don't have HE filler.
+
From the front, only high-end rounds (HEATFS, HESH, APFSDS) can penetrate the IS-6. Otherwise, flank it since its lower side armour is flat behind the tracks. In a close to medium range fight, if the IS-6 is static and facing you, try to shoot its right side turret cupola, a penetrating APHE shell may knock out the commander and gunner, disabling the tank (some large calibre rounds can even knock out the loader and/or driver, resulting in an instant elimination). This strategy is not applicable with rounds that don't have HE filler.
  
 
Another weak spot is the left side of the mantlet which has the optics in it. This part of the armour is thin enough that most shells at the BR can penetrate it, and in doing do, incapacitate the commander and gunner and destroy the cannon breech. If you are lucky and the IS-6 has ammo in the back of its turret, there is a chance to detonate it as well for an instant elimination.
 
Another weak spot is the left side of the mantlet which has the optics in it. This part of the armour is thin enough that most shells at the BR can penetrate it, and in doing do, incapacitate the commander and gunner and destroy the cannon breech. If you are lucky and the IS-6 has ammo in the back of its turret, there is a chance to detonate it as well for an instant elimination.
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=== Mobility ===
 
=== 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.'' -->
 
<!-- ''Write about the mobility of the ground vehicle. Estimate the specific power and manoeuvrability, as well as the maximum speed forwards and backwards.'' -->
  
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If used well, the {{PAGENAME}} can get into position as fast as a T-54. It is certainly one of the fastest late IS-series tanks. It reaches 44.3 km/h (27.5 mph), the top speed in RB, with ease and has a reverse speed of -16.1 km/h (10 mph).
 
If used well, the {{PAGENAME}} can get into position as fast as a T-54. It is certainly one of the fastest late IS-series tanks. It reaches 44.3 km/h (27.5 mph), the top speed in RB, with ease and has a reverse speed of -16.1 km/h (10 mph).
 +
 +
=== Modifications and economy ===
 +
{{Specs-Economy}}
  
 
== Armaments ==
 
== Armaments ==
 +
{{Specs-Tank-Armaments}}
 
=== Main armament ===
 
=== Main armament ===
 +
{{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.'' -->
 
<!-- ''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-30T (122 mm)}}
 
{{main|D-30T (122 mm)}}
  
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The IS-6 features an upgraded version of the [[D-25T (122 mm)|D-25T]] gun found on other IS series variants, the D-30T. Though identical ballistically, it provides a much faster reload, with the IS-6 having a default reload rate only 0.5 seconds longer than the [[T-10M]]. The IS-6 uses the same ammo load as the [[IS-2]] with the best shell being the BR-471B, which means the tank will have trouble against some heavies it may encounter from lacking penetration. In addition, the IS-6 does not have access to the BR-471D, which is usable on the IS-3, also at 7.3 rating.
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The IS-6 features an upgraded version of the [[D-25T (122 mm)|D-25T]] gun found on other IS series variants, the D-30T. Though identical ballistically, it provides a much faster reload, with the IS-6 having a default reload rate only 0.5 seconds longer than the [[T-10M]]. The IS-6 uses the same ammo load as the [[IS-3]] with the best shell being the BR-471D.
  
 
{| class="wikitable" style="text-align:center" width="100%"
 
{| class="wikitable" style="text-align:center" width="100%"
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==== Ammunition ====
 
==== Ammunition ====
−
{| class="wikitable sortable" style="text-align:center" width="100%"
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{{:D-30T (122 mm)/Ammunition|BR-471, OF-471, BR-471B, BR-471D}}
−
! colspan="8" | Penetration statistics
 
−
|-
 
−
! rowspan="2" data-sort-type="text" | Ammunition
 
−
! rowspan="2" | Type of<br>warhead
 
−
! colspan="6" | '''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
 
−
|-
 
−
|}
 
−
{| class="wikitable sortable" style="text-align:center" width="100%"
 
−
! colspan="10" | Shell details
 
−
|-
 
−
! rowspan="2" data-sort-type="text" | Ammunition
 
−
! rowspan="2" | Type of<br>warhead
 
−
! rowspan="2" | Velocity<br>(m/s)
 
−
! rowspan="2" | Projectile<br>Mass (kg)
 
−
! rowspan="2" | Fuse delay<br>(m)
 
−
! rowspan="2" | Fuse sensitivity<br>(mm)
 
−
! rowspan="2" | Explosive Mass<br>(TNT equivalent) (g)
 
−
! colspan="3" | Ricochet
 
−
|-
 
−
! 0% !! 50% !! 100%
 
−
|-
 
−
| BR-471 || APHE || 795 || 25 || 1.2 || 19 || 246.4 || 47° || 60° || 65°
 
−
|-
 
−
| BR-471B || APHEBC || 795 || 25 || 1.2 || 19 || 246.4 || 48° || 63° || 71°
 
−
|-
 
−
| OF-471 || HE || 800 || 25 || 0.1 || 0.1 || 3,600 || 79° || 80° || 81°
 
−
|-
 
−
|}
 
  
 
==== [[Ammo racks]] ====
 
==== [[Ammo racks]] ====
 
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
 
[[File:Ammoracks_{{PAGENAME}}.png|right|thumb|x250px|[[Ammo racks]] of the {{PAGENAME}}]]
 +
<!-- '''Last updated: 2.23.1.41''' -->
 
{| class="wikitable" style="text-align:center"
 
{| class="wikitable" style="text-align:center"
 
|-
 
|-
 
! Full<br>ammo
 
! Full<br>ammo
−
! Ammo<br>part
 
 
! 1st<br>rack empty
 
! 1st<br>rack empty
 
! 2nd<br>rack empty
 
! 2nd<br>rack empty
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! 5th<br>rack empty
 
! 5th<br>rack empty
 
! 6th<br>rack empty
 
! 6th<br>rack empty
−
! 7th<br>rack empty
 
 
! Visual<br>discrepancy
 
! Visual<br>discrepancy
 
|-
 
|-
−
| '''30''' || style="text-align:right" | ''Projectiles''<br />''Propellants'' || 17&nbsp;''(+13)''<br />25&nbsp;''(+5)'' || 13&nbsp;''(+17)''<br />19&nbsp;''(+11)'' || 9&nbsp;''(+21)''<br />13&nbsp;''(+17)'' || 7&nbsp;''(+23)''<br />7&nbsp;''(+23)'' || 5&nbsp;''(+25)''<br />1&nbsp;''(+27)'' || 3&nbsp;''(+27)''<br />&nbsp; || 1&nbsp;''(+29)''<br />&nbsp; || style="text-align:left" | No
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| '''30''' || 13&nbsp;''(+17)''<br>25&nbsp;''(+5)'' || 9&nbsp;''(+21)''<br>19&nbsp;''(+11)'' || 7&nbsp;''(+23)''<br>13&nbsp;''(+17)'' || 5&nbsp;''(+25)''<br>7&nbsp;''(+23)'' || 3&nbsp;''(+27)''<br>1&nbsp;''(+27)'' || 1&nbsp;''(+29)''<br>&nbsp; || No
 
|-
 
|-
 
|}
 
|}
 +
'''Notes:'''
  
−
Turret empty: 13&nbsp;(+17)
+
* The {{PAGENAME}} uses two-piece ammunition, composed of propellant bags (orange) and projectiles (yellow). Both have separate racks.
 +
* Turret empty: 13&nbsp;(+17) shells.
  
 
=== Machine guns ===
 
=== Machine guns ===
 +
{{Specs-Tank-Weapon|2}}
 +
{{Specs-Tank-Weapon|3}}
 
<!-- ''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)|DT (7.62 mm)}}
 
{{main|DShK (12.7 mm)|DT (7.62 mm)}}
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! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
 
! Mount !! Capacity (Belt) !! Fire rate !! Vertical !! Horizontal
 
|-
 
|-
−
| Coaxial || 2,000 (63) || 600 || N/A || N/A
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| Coaxial || 2,016 (63) || 600 || - || -
 
|-
 
|-
 
|}
 
|}
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<!-- ''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).'' -->
 
<!-- ''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).'' -->
  
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The IS-6 brings about improved mobility characteristics compared to the [[IS-3]] in the tech tree, yet retains similar armour characteristics and firepower (though it lacks the higher-penetrating BR-471D shell). This mobility improvement should not be taken lightly as it allows the IS-6 to react faster to new threats, whether it be an offensive push, a repositioning, or a short withdrawal.
+
The IS-6 brings about improved mobility characteristics compared to the [[IS-3]] in the tech tree, yet it retains similar armour characteristics and firepower. This mobility improvement should not be taken lightly as it allows the IS-6 to react faster to new threats, whether it be an offensive push, a repositioning, or a short withdrawal.
  
 
The role the IS-6 excels at is as a breakthrough vehicle. The IS-6 should take front stage when it comes to assaulting an objective. Its speed and armour can allow the heavy tank to take on enemy fire while on the move as most AP rounds will struggle to penetrate the IS-6 when its armour remains sloped towards the enemy. Make the enemies focus on the IS-6 so teammates can move up and engage the enemies from different angles. Once the enemy focuses on the teammates, move up and assist in taking out the enemy with the IS-6's 122 mm gun.
 
The role the IS-6 excels at is as a breakthrough vehicle. The IS-6 should take front stage when it comes to assaulting an objective. Its speed and armour can allow the heavy tank to take on enemy fire while on the move as most AP rounds will struggle to penetrate the IS-6 when its armour remains sloped towards the enemy. Make the enemies focus on the IS-6 so teammates can move up and engage the enemies from different angles. Once the enemy focuses on the teammates, move up and assist in taking out the enemy with the IS-6's 122 mm gun.
  
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Firepower is rather lacklustre with the maximum 205 mm penetration at point-blank range, meaning most shots with the IS-6 needs to be carefully aimed towards the enemy's weak points. Combined with the lengthy reload, the first shot the IS-6 takes on an enemy is essential as it may determine the outcome of the engagement. These limiting factors mean that the ideal fighting range for the IS-6 is around 500 metres, as this allows the IS-6 to make the most of the 122 mm gun's penetration and velocity while staying far enough away that the enemy could not quickly rush the IS-6 while it is reloading. Although the reloading weakness can be mitigated by having an escape plan ready so to use the IS-6's mobility to make a tactical retreat.
+
Firepower may be rather lacklustre against heavier targets with the maximum 230 mm penetration at point-blank range, meaning shots with the IS-6 need to be carefully aimed towards the enemy's weak points. Combined with the lengthy reload, the first shot the IS-6 takes on an enemy is essential as it may determine the outcome of the engagement. These limiting factors mean that the ideal fighting range for the IS-6 is around 500 metres, as this allows the IS-6 to make the most of the 122 mm gun's penetration and velocity while staying far enough away that the enemy could not quickly rush the IS-6 while it is reloading. The reloading weakness can also be mitigated by having an escape plan ready, so use the IS-6's mobility to make a tactical retreat.
  
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These features make the IS-6 a somewhat good defender as well, taking the role after assaulting an objective. Making use of cover in a capture area, the IS-6 can lock down chokepoints and focus its 122 mm gun down the range, using its mobility to quickly withdraw after a shot. As the IS-6 would be watching in a more stationary role, the gun handling would be more stable so to be able to make longer-ranged shots against enemies attempting to (re)capture the point. Do keep in mind the gun's bad gun depression of only -3°, so the IS-6 is likely to have a good part of its armour exposed when attempting to face the enemy from a defensive position. As stated above, ensure a good escape strategy is formulated so that a bad 122 mm shot doesn't result in the enemy swarming the IS-6.
+
These features make the IS-6 a somewhat good defender as well, taking the role after assaulting an objective. Making use of cover in a capture area, the IS-6 can lock down chokepoints and focus its 122 mm gun down the range, using its mobility to quickly withdraw after a shot. As the IS-6 would be watching in a more stationary role, the gun handling would be more stable so to be able to make longer-ranged shots against enemies attempting to (re)capture the point. Do keep in mind the bad gun depression of only -3°, so the IS-6 is likely to have a good part of its armour exposed when attempting to face the enemy from a defensive position. As stated above, ensure a good escape strategy is formulated so that a bad 122 mm shot doesn't result in the enemy swarming the IS-6.
  
−
Facing enemies with HEAT-FS rounds is a dire situation for the IS-6 as the armour is not thick enough to withstand the round in any angle. Extreme caution should be taken when fighting those tanks. It would be more ideal to withdraw into a different firing position and either wait to ambush the enemy tank as it comes to pursue the IS-6 or provide teammates the opportunity to take out the enemy.
+
Facing enemies with HEATFS rounds is a dire situation for the IS-6 as the armour is not thick enough to withstand the round in any angle. Extreme caution should be taken when fighting those tanks. It would be more ideal to withdraw into a different firing position and either wait to ambush the enemy tank as it comes to pursue the IS-6 or provide teammates the opportunity to take out the enemy.
−
 
 
−
=== Modules ===
 
−
{| class="wikitable"
 
−
! Tier
 
−
! colspan="2" | Mobility
 
−
! Protection
 
−
! colspan="2" | 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
 
−
|
 
−
|
 
−
|
 
−
|-
 
−
! colspan="6" | This is a premium vehicle: all modifications are unlocked on purchase
 
−
|-
 
−
|}
 
  
 
=== Pros and cons ===
 
=== Pros and cons ===
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* Reload rate considerably faster than usual 122 mm, default is only half a second slower than the T-10M
 
* Reload rate considerably faster than usual 122 mm, default is only half a second slower than the T-10M
−
* 12.7 mm DShK allows for defence against aircraft and lightly-armoured vehicles
+
* The best 122 mm shell available is still manageable due to good overmatching mechanics and tremendous post-penetration damage potential
−
* Excellent 100 mm sloping armour on front and sides
+
* Frontal armour is a 100 mm plate sloped at a very steep angle, making it mostly immune to anything that isn't APDS or HEATFS
−
* Sleek turret design makes it a smaller target
+
* Like the IS-3, the lower plate isn't a weak spot
−
* Lower glacis is thicker than the upper glacis (120 mm vs 100 mm), though not as sloped
+
* Very good as side-scraping due to the high levels of side armour
−
* Suspension wheels, torsion bars, and tracks allow for better protection on lower side hull
+
* The turret is both small, well-armoured, and rounded
−
* Agile despite its weight and heavy armour
+
* The weak spot on the turret front is smaller than the Tiger II's, hitting it at ranges exceeding 500 m is very difficult
−
* 150 mm gun mantlet cannot be penetrated by most German guns, due to its 50 mm spaced armour (cannot be normally seen in hangar)
+
* Very low profile for a heavy, meaning it can hide in places that the Tiger II simply can't
−
* Good reverse speed
+
* Is very fast and manoeuvrable for a heavy tank
−
* Premium vehicle bonuses
+
* Due to the armour, fire rate, and reverse speed, the IS-6 is very good at shoot-and-scoot tactics as well as brawling
−
* Very small weak spots at long distances
+
* Has a 12.7 mm pintle-mounted heavy machine gun on the roof
−
* Optics and MG can stop most shrapnel from eliminating the crew and damaging gun breech, which benefits even more from the 50 mm spaced plate
+
* Due to the top speed, high levels of armour, and firepower, the IS-6 is a more versatile tank than the IS-3
  
 
'''Cons:'''
 
'''Cons:'''
  
−
* Inadequate ammunition against some upper rank vehicles such as [[Maus]]
+
* Enemies firing HEAT and APDS are common and can penetrate the IS-6's armour with ease
−
* Very poor gun depression due to sleek turret design
+
* The IS-6 is still very capable of getting the turret front penetrated by tanks like the Tiger II, T29, and Centurion Mk 3
−
* Ammunition is strewn all over the hull fighting compartment
+
* Like most Russian heavies, has an abysmal 3 degrees of gun depression, so finding the proper hull down locations is hard
−
* Its sloped armour can be defeated by high caliber British HESH and American HEAT-FS
+
* The 4-man crew is crammed in a small crew compartment that's full of ammo, and penetrating APHE shell will likely incapacitate the entire turret crew or set off an ammo explosion
−
* Speed goes down dramatically when turning
 
−
* Turret cupolas can be vulnerable at close ranges, if not over penetrated
 
−
* Gun mantlet design allows trap shots, but it is very random and rare
 
−
* Lower side armour is weak versus German guns at angles lower than 60°
 
−
* Low crew count for a heavy tank of 4 people
 
  
 
== History ==
 
== History ==
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The two prototypes differed in more ways than just the transmission. Object 252 used the mechanical transmission from the [[IS-3]], with large road wheels and no track rollers for its torsion bar suspension.<ref name="BoldyrevTank" /> Object 253 used an electric transmission with a suspension that looked similarly to previous IS iterations with smaller road wheels and track rollers. The IS-6 prototypes failed to stay under the weight of the IS-2, being around 51.5 tons.<ref name="TankArchives257" /> The 122 mm gun arming the IS-6 was the D-30, compared to the D-25T on the predecessors. The D-30 implemented features such as the D-25's monobloc design, the 100 mm D-10's breech and gas block, a two-spring balancing mechanism, a lengthened D-25 mount, and a fume extractor. This gun was installed onto the IS-6 prototypes in December 1944.<ref name="TankArchivesD-30" />
 
The two prototypes differed in more ways than just the transmission. Object 252 used the mechanical transmission from the [[IS-3]], with large road wheels and no track rollers for its torsion bar suspension.<ref name="BoldyrevTank" /> Object 253 used an electric transmission with a suspension that looked similarly to previous IS iterations with smaller road wheels and track rollers. The IS-6 prototypes failed to stay under the weight of the IS-2, being around 51.5 tons.<ref name="TankArchives257" /> The 122 mm gun arming the IS-6 was the D-30, compared to the D-25T on the predecessors. The D-30 implemented features such as the D-25's monobloc design, the 100 mm D-10's breech and gas block, a two-spring balancing mechanism, a lengthened D-25 mount, and a fume extractor. This gun was installed onto the IS-6 prototypes in December 1944.<ref name="TankArchivesD-30" />
  
−
The IS-6 prototypes were tested alongside the ''Object 701'' (the prototype of the [[IS-4M|IS-4]]).<ref name="TankArchives257" /> The two IS-6 prototypes proved disappointing, with the Object 253's electric transmission being too complex, expensive, and unreliable.<ref name="KinnearT10" /> The Object 252's mechanical transmission also suffered from reliability issues. Suspension problems also impacted the IS-6, with its speed dropping below the heavier Object 701. It was hoped that the electric transmission would help make the tank more maneuverable, but the heavy weight prohibited any vast improvements.<ref name="BoldyrevTank" /> Overall, the IS-6 armour was deemed to not provide any improvements over existing designs, having only comparable armour, firepower, and mobility to the IS-2 and IS-3. In 1945, all work on the IS-6 ceased as work continued on the Object 701.<ref name="TankArchives257" />
+
The IS-6 prototypes were tested alongside the ''Object 701'' (the prototype of the [[IS-4M|IS-4]]).<ref name="TankArchives257" /> The two IS-6 prototypes proved disappointing, with the Object 253's electric transmission being too complex, expensive, and unreliable.<ref name="KinnearT10" /> The Object 252's mechanical transmission also suffered from reliability issues. Suspension problems also impacted the IS-6, with its speed dropping below the heavier Object 701. It was hoped that the electric transmission would help make the tank more manoeuvrable, but the heavy weight prohibited any vast improvements.<ref name="BoldyrevTank" /> Overall, the IS-6 armour was deemed to not provide any improvements over existing designs, having only comparable armour, firepower, and mobility to the IS-2 and IS-3. In 1945, all work on the IS-6 ceased as work continued on the Object 701.<ref name="TankArchives257" />
  
 
== 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.'' -->
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{{Youtube-gallery|N6PVSequHlM|'''The Shooting Range #37''' - ''Metal Beasts'' section at 00:29 discusses the IS-6.|JGxJqegdhac|'''War Thunder''' - How to destroy the IS-6.}}
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;Skins
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* [https://live.warthunder.com/feed/camouflages/?vehicle=ussr_is_6 Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.]
 +
 
 +
;Videos
 +
{{Youtube-gallery|hb-P5hQN6K0|'''The Shooting Range #308''' - ''Pages of History'' section at 03:54 discusses the {{PAGENAME}}.|JGxJqegdhac|'''War Thunder''' - How to destroy the IS-6.|N6PVSequHlM|'''The Shooting Range #37''' - ''Metal Beasts'' section at 00:29 discusses the IS-6.}}
  
 
== 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.''
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<!-- ''Paste links to sources and external resources, such as:''
 
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* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
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* ''encyclopedia page on the tank;''
 
 
* ''other literature.'' -->
 
* ''other literature.'' -->
  
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* [[wt:en/news/4564-development-is-6-the-soviet-hammer-en/|[Devblog<nowiki>]</nowiki> IS-6: the Soviet Hammer]]
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* [[wt:en/news/4564-development-is-6-the-soviet-hammer-en/|[Devblog] IS-6: the Soviet Hammer]]
  
 
=== References ===
 
=== References ===
 
<references>
 
<references>
−
<ref name="BoldyrevTank">Boldyrev, Eugeni. "Last Heavy Tanks of the USSR." The Russian Battlefield. N.p., 18 Sept. 2011. Web. 08 Jan. 2018. [http://english.battlefield.ru/tanks/10-heavy-tanks/21-last-heavy-tanks.html Website]</ref>
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<ref name="BoldyrevTank">Boldyrev, Eugeni. "Last Heavy Tanks of the USSR." The Russian Battlefield. N.p., 18 Sept. 2011. Web. 08 Jan. 2018. [https://web.archive.org/web/20200214024555/http://english.battlefield.ru/tanks/10-heavy-tanks/21-last-heavy-tanks.html Web Archive]</ref>
 
<ref name="KinnearT10">Kinnear, James, and Stephen L. Sewell. ''Soviet T-10 Heavy Tank and Variants''. N.p.: Osprey Pub, 2017. Print</ref>
 
<ref name="KinnearT10">Kinnear, James, and Stephen L. Sewell. ''Soviet T-10 Heavy Tank and Variants''. N.p.: Osprey Pub, 2017. Print</ref>
 
<ref name="TankArchivesD-30">TankArchives. "D-30 Gun for the IS-6." Tank Archives. N.p., 19 Sept. 2013. Web. 08 Jan. 2018. [http://tankarchives.blogspot.com/2013/09/d-30-gun-for-is-6.html Website]</ref>
 
<ref name="TankArchivesD-30">TankArchives. "D-30 Gun for the IS-6." Tank Archives. N.p., 19 Sept. 2013. Web. 08 Jan. 2018. [http://tankarchives.blogspot.com/2013/09/d-30-gun-for-is-6.html Website]</ref>
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</references>
 
</references>
  
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{{TankManufacturer Uralvagonzavod}}
 
{{USSR heavy tanks}}
 
{{USSR heavy tanks}}
 
{{USSR premium ground vehicles}}
 
{{USSR premium ground vehicles}}

Latest revision as of 23:34, 10 May 2024

Rank 7 USA
F-5C Pack
IS-6
ussr_is_6.png
GarageImage IS-6.jpg
IS-6
USSR flag.png USSR
V Rank
Battle rating:
AB RB SB
7.7 7.7 7.7
Class:
PREMIUM
Purchase:Bundle or Gift
Show in game
STORE

Description

The IS-6 is the fifth variant of the IS heavy tank family. It was never mass-produced and remained in the prototype stage. There was an effort to develop a replacement for the IS-2 in the closing years of World War II ('The Great Patriotic War' to the Soviets). The IS-6 (Object 252/Object 253) and IS-4 (Object 701) were created as a result of the development process. This effort was highly classified, with two competing factories creating their designs in complete secrecy for fear of exposing knowledge to one another. On paper, the IS-6 appeared to be superior to any tank in Germany's inventory at the time. However, due to mechanical faults and generally poor performance, it was beaten by its competitor during test trials, the IS-4, which entered service in 1946. Despite this, a last-ditch effort was made to improve the IS-6, with minimal success. The improved IS-6 would be known as the Object 252 November improvement, or simply the Object 252U.

Introduced in Update 1.67 "Assault", the IS-6 is one of the most feared tanks in its ranks, thanks to its strong main armament and incredible mobility packed inside a steeply sloped, thick armour that most conventional ammunition cannot penetrate. This tank may be used in every role and situation, and it will undoubtedly find a place on the battlefield. The IS-6's excellent mobility and reasonable reverse speed allow it to navigate through challenging environments that many other tanks would struggle with. Players familiar with IS heavy tanks will be happy to learn that the IS-6 has superior manoeuvrability when compared to other variants.

General info

Survivability and armour

Armourfront / side / back
Hull100 / 120 / 60
Turret150 / 150 / 100
Crew4 people
Visibility102 %

100 mm sloped at more or less 60­° on all sides provide this vehicle with a reputation to be a ricochet master. Firing on the hull from almost any angle will only result in a glancing shot. The only weak spot being the lower sides of the hull and turret sides and rear, the only way to reliably penetrate it is to get a shot from the side. An attentive player that never shows the sides is an invincible opponent. However, be aware of the frontal armour, as the extremely angled turret armour encasing the cannon breech can create a shot trap and ricochet the shell into the driver's area. This will likely result in your ammo exploding. Be wary when facing any opponent.

Armour type:

  • Rolled homogeneous armour (hull, turret roof, cupola roof)
  • Cast homogeneous armour (turret, cupola)
Armour Front (Slope angle) Sides Rear Roof
Hull 100 mm (62-65°) Front glacis
120 mm (53°) Lower glacis
100 mm (65°) Driver's port 		120 mm (45°) Top
100 + 10 mm Bottom 		60-75 mm (60°) Top
60 mm (30°) Bottom 		20 mm
Turret 150 mm (6-45°) Turret front
100-200 + 50 mm (1-76°) Gun mantlet 		150 mm (7-51°) 100 mm (5-50°) 30 mm
Cupola 100 mm (cylindrical) 100 mm Outer ring
30 mm Centre

Notes:

  • Suspension wheels are 20 mm thick while tracks are 30 mm thick. Torsion bar connectors by the wheels are 60 mm thick.
  • Spaced armour plates are placed on the sides, giving an additional 10 mm of side armour.

From the front, only high-end rounds (HEATFS, HESH, APFSDS) can penetrate the IS-6. Otherwise, flank it since its lower side armour is flat behind the tracks. In a close to medium range fight, if the IS-6 is static and facing you, try to shoot its right side turret cupola, a penetrating APHE shell may knock out the commander and gunner, disabling the tank (some large calibre rounds can even knock out the loader and/or driver, resulting in an instant elimination). This strategy is not applicable with rounds that don't have HE filler.

Another weak spot is the left side of the mantlet which has the optics in it. This part of the armour is thin enough that most shells at the BR can penetrate it, and in doing do, incapacitate the commander and gunner and destroy the cannon breech. If you are lucky and the IS-6 has ammo in the back of its turret, there is a chance to detonate it as well for an instant elimination.

If you happen to flank an IS-6, take the time to aim since half of its side is covered by its dreaded armour. A missed shot will alert the IS-6 player, withdrawing with its fast speed from sight before another shot could be landed. Turret sides and back can ricochet rounds as well, so keep the hull as a priority target.

If encountering this foe from its back, keep in mind to aim for the middle of the engine deck since plates on both sides are as though as their frontal counterparts. If confident, go for it and aim at the turret back.

Any round penetrating the crew compartment leads to an ammo rack detonation most of the time since this tank's interior is filled with ammo all over the place.

Mobility

Speedforward / back
AB48 / 19 km/h
RB and SB45 / 18 km/h
Number of gears8 forward
2 back
Weight51.1 t
Engine power
AB1 336 hp
RB and SB700 hp
Power-to-weight ratio
AB26.1 hp/t
RB and SB13.7 hp/t
Game Mode Max Speed (km/h) Weight (tons) Engine power (horsepower) Power-to-weight ratio (hp/ton)
Forward Reverse Stock Upgraded Stock Upgraded
Arcade 48 19 51.1 904 1,336 17.69 26.14
Realistic 45 18 619 700 12.11 13.7

If used well, the IS-6 can get into position as fast as a T-54. It is certainly one of the fastest late IS-series tanks. It reaches 44.3 km/h (27.5 mph), the top speed in RB, with ease and has a reverse speed of -16.1 km/h (10 mph).

Modifications and economy

Repair cost
AB3 498 Sl icon.png
RB3 611 Sl icon.png
SB5 120 Sl icon.png
Crew training10 000 Sl icon.png
Experts490 000 Sl icon.png
Aces1 200 Ge icon.png
Research Aces1 440 000 Rp icon.png
Reward for battleAB / RB / SB
Talisman.png 2 × 150 / 210 / 240 % Sl icon.png
Talisman.png 2 × 196 / 196 / 196 % Rp icon.png
Modifications
Mobility Protection Firepower
Mods new tank traks.png
Tracks
Mods new tank suspension.png
Suspension
Mods new tank break.png
Brake System
Mods new tank filter.png
Filters
Mods new tank transmission.png
Transmission
Mods new tank engine.png
Engine
Mods tank tool kit.png
Improved Parts
Mods extinguisher.png
Improved FPE
Mods tank reinforcement ussr.png
Crew Replenishment
Mods new tank horizontal aiming.png
Horizontal Drive
Mods tank ammo.png
122mm_APHE_ammo_pack
Mods tank cannon.png
Adjustment of Fire
Mods new tank vertical aiming.png
Elevation Mechanism
Mods tank ammo.png
122mm_APCBC_ammo_pack

Armaments

Main armament

122 mm D-30T cannon
Ammunition30 rounds
Reloadbasic crew → aces
20.5 → 15.8 s
Vertical guidance-3° / 20°
Main article: D-30T (122 mm)

The IS-6 features an upgraded version of the D-25T gun found on other IS series variants, the D-30T. Though identical ballistically, it provides a much faster reload, with the IS-6 having a default reload rate only 0.5 seconds longer than the T-10M. The IS-6 uses the same ammo load as the IS-3 with the best shell being the BR-471D.

122 mm D-30T Turret rotation speed (°/s) Reloading rate (seconds)
Mode Capacity Vertical Horizontal Stabilizer Stock Upgraded Full Expert Aced Stock Full Expert Aced
Arcade 30 -3°/+20° ±180° N/A 11.33 15.68 19.04 21.06 22.40 20.54 18.17 16.75 15.80
Realistic 8.33 9.80 11.90 13.16 14.00

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
BR-471 APHE 205 201 182 161 143 127
OF-471 HE 37 37 37 37 37 37
BR-471B APHEBC 205 203 192 178 166 155
BR-471D APCBC 230 227 215 200 186 173
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 1.2 19 246.4 47° 60° 65°
OF-471 HE 795 25 0 0.1 3,600 79° 80° 81°
BR-471B APHEBC 795 25 1.2 19 246.4 48° 63° 71°
BR-471D APCBC 800 25 1.2 19 192.5 48° 63° 71°

Ammo racks

Ammo racks of the IS-6
Full
ammo 		1st
rack empty 		2nd
rack empty 		3rd
rack empty 		4th
rack empty 		5th
rack empty 		6th
rack empty 		Visual
discrepancy
30 13 (+17)
25 (+5) 		9 (+21)
19 (+11) 		7 (+23)
13 (+17) 		5 (+25)
7 (+23) 		3 (+27)
1 (+27) 		1 (+29)
  		No

Notes:

  • The IS-6 uses two-piece ammunition, composed of propellant bags (orange) and projectiles (yellow). Both have separate racks.
  • Turret empty: 13 (+17) shells.

Machine guns

12.7 mm DShK machine gun
Ammunition300 rounds
Belt capacity50 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate600 shots/min
Vertical guidance-4° / 85°
7.62 mm DT machine gun (coaxial)
Ammunition2 016 rounds
Belt capacity63 rounds
Reloadbasic crew → aces
10.4 → 8.0 s
Fire rate600 shots/min
Main articles: DShK (12.7 mm), DT (7.62 mm)
12.7 mm DShK
Mount Capacity (Belt) Fire rate Vertical Horizontal
Pintle 300 (50) 600 -4°/+85° ±180°
7.62 mm DT
Mount Capacity (Belt) Fire rate Vertical Horizontal
Coaxial 2,016 (63) 600 - -

Usage in battles

The IS-6 brings about improved mobility characteristics compared to the IS-3 in the tech tree, yet it retains similar armour characteristics and firepower. This mobility improvement should not be taken lightly as it allows the IS-6 to react faster to new threats, whether it be an offensive push, a repositioning, or a short withdrawal.

The role the IS-6 excels at is as a breakthrough vehicle. The IS-6 should take front stage when it comes to assaulting an objective. Its speed and armour can allow the heavy tank to take on enemy fire while on the move as most AP rounds will struggle to penetrate the IS-6 when its armour remains sloped towards the enemy. Make the enemies focus on the IS-6 so teammates can move up and engage the enemies from different angles. Once the enemy focuses on the teammates, move up and assist in taking out the enemy with the IS-6's 122 mm gun.

Firepower may be rather lacklustre against heavier targets with the maximum 230 mm penetration at point-blank range, meaning shots with the IS-6 need to be carefully aimed towards the enemy's weak points. Combined with the lengthy reload, the first shot the IS-6 takes on an enemy is essential as it may determine the outcome of the engagement. These limiting factors mean that the ideal fighting range for the IS-6 is around 500 metres, as this allows the IS-6 to make the most of the 122 mm gun's penetration and velocity while staying far enough away that the enemy could not quickly rush the IS-6 while it is reloading. The reloading weakness can also be mitigated by having an escape plan ready, so use the IS-6's mobility to make a tactical retreat.

These features make the IS-6 a somewhat good defender as well, taking the role after assaulting an objective. Making use of cover in a capture area, the IS-6 can lock down chokepoints and focus its 122 mm gun down the range, using its mobility to quickly withdraw after a shot. As the IS-6 would be watching in a more stationary role, the gun handling would be more stable so to be able to make longer-ranged shots against enemies attempting to (re)capture the point. Do keep in mind the bad gun depression of only -3°, so the IS-6 is likely to have a good part of its armour exposed when attempting to face the enemy from a defensive position. As stated above, ensure a good escape strategy is formulated so that a bad 122 mm shot doesn't result in the enemy swarming the IS-6.

Facing enemies with HEATFS rounds is a dire situation for the IS-6 as the armour is not thick enough to withstand the round in any angle. Extreme caution should be taken when fighting those tanks. It would be more ideal to withdraw into a different firing position and either wait to ambush the enemy tank as it comes to pursue the IS-6 or provide teammates the opportunity to take out the enemy.

Pros and cons

Pros:

  • Reload rate considerably faster than usual 122 mm, default is only half a second slower than the T-10M
  • The best 122 mm shell available is still manageable due to good overmatching mechanics and tremendous post-penetration damage potential
  • Frontal armour is a 100 mm plate sloped at a very steep angle, making it mostly immune to anything that isn't APDS or HEATFS
  • Like the IS-3, the lower plate isn't a weak spot
  • Very good as side-scraping due to the high levels of side armour
  • The turret is both small, well-armoured, and rounded
  • The weak spot on the turret front is smaller than the Tiger II's, hitting it at ranges exceeding 500 m is very difficult
  • Very low profile for a heavy, meaning it can hide in places that the Tiger II simply can't
  • Is very fast and manoeuvrable for a heavy tank
  • Due to the armour, fire rate, and reverse speed, the IS-6 is very good at shoot-and-scoot tactics as well as brawling
  • Has a 12.7 mm pintle-mounted heavy machine gun on the roof
  • Due to the top speed, high levels of armour, and firepower, the IS-6 is a more versatile tank than the IS-3

Cons:

  • Enemies firing HEAT and APDS are common and can penetrate the IS-6's armour with ease
  • The IS-6 is still very capable of getting the turret front penetrated by tanks like the Tiger II, T29, and Centurion Mk 3
  • Like most Russian heavies, has an abysmal 3 degrees of gun depression, so finding the proper hull down locations is hard
  • The 4-man crew is crammed in a small crew compartment that's full of ammo, and penetrating APHE shell will likely incapacitate the entire turret crew or set off an ammo explosion

History

The Chelyabinsk Kirov Plant Work (ChKZ) began drafting the designs of a new heavy tank on 02 May 1944[1] with an electrotransmission, a drive system that was used on the German Ferdinand/Elefant. The plant was officially ordered to begin work on June 08[2] for two versions of the heavy tank, with emphasis of having significant advantages over the current IS-2 heavy tank. The heavy tank was designated as the IS-6 and the two versions were the Object 252 with a mechanical transmission and the Object 253 with a electric transmission.[3] Both prototypes were produced in the Fall of 1944 and were sent to be tested at the NIIBT testing grounds at Kubinka.

The two prototypes differed in more ways than just the transmission. Object 252 used the mechanical transmission from the IS-3, with large road wheels and no track rollers for its torsion bar suspension.[4] Object 253 used an electric transmission with a suspension that looked similarly to previous IS iterations with smaller road wheels and track rollers. The IS-6 prototypes failed to stay under the weight of the IS-2, being around 51.5 tons.[5] The 122 mm gun arming the IS-6 was the D-30, compared to the D-25T on the predecessors. The D-30 implemented features such as the D-25's monobloc design, the 100 mm D-10's breech and gas block, a two-spring balancing mechanism, a lengthened D-25 mount, and a fume extractor. This gun was installed onto the IS-6 prototypes in December 1944.[6]

The IS-6 prototypes were tested alongside the Object 701 (the prototype of the IS-4).[5] The two IS-6 prototypes proved disappointing, with the Object 253's electric transmission being too complex, expensive, and unreliable.[2] The Object 252's mechanical transmission also suffered from reliability issues. Suspension problems also impacted the IS-6, with its speed dropping below the heavier Object 701. It was hoped that the electric transmission would help make the tank more manoeuvrable, but the heavy weight prohibited any vast improvements.[4] Overall, the IS-6 armour was deemed to not provide any improvements over existing designs, having only comparable armour, firepower, and mobility to the IS-2 and IS-3. In 1945, all work on the IS-6 ceased as work continued on the Object 701.[5]

Media

Skins
Videos
The Shooting Range #308 - Pages of History section at 03:54 discusses the IS-6.
War Thunder - How to destroy the IS-6.
The Shooting Range #37 - Metal Beasts section at 00:29 discusses the IS-6.

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

References

  1. ↑ TankArchives. "Electrical Transmission." Tank Archives. N.p., 02 June 2014. Web. 08 Jan. 2018. Website
  2. ↑ 2.0 2.1 Kinnear, James, and Stephen L. Sewell. Soviet T-10 Heavy Tank and Variants. N.p.: Osprey Pub, 2017. Print
  3. ↑ TankArchives. "Launch of the IS-6." Tank Archives. N.p., 20 Dec. 2016. Web. 08 Jan. 2018. Website
  4. ↑ 4.0 4.1 Boldyrev, Eugeni. "Last Heavy Tanks of the USSR." The Russian Battlefield. N.p., 18 Sept. 2011. Web. 08 Jan. 2018. Web Archive
  5. ↑ 5.0 5.1 5.2 TankArchives. "Object 257: The First IS-7." Tank Archives. N.p., 12 June 2016. Web. 08 Jan. 2018. Website
  6. ↑ TankArchives. "D-30 Gun for the IS-6." Tank Archives. N.p., 19 Sept. 2013. Web. 08 Jan. 2018. Website


Ural Railroad Car Plant (УралВагонЗавод)
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IS-1/2  IS-1 · IS-2 · IS-2 (1944) · IS-2 No.321 · IS-2 "Revenge" · Object 248
Other IS tanks  IS-3 · IS-4M · IS-6 · IS-7
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