IS-6

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Arcade Realistic Simulator

Arcade Realistic Simulator

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General info

IS-6 in the garage.

The IS-6 is a gift Rank IV Soviet heavy tank with a battle rating of 7.3. It was introduced in Update 1.67 "Assault".

The main purpose, usage and tactics recommendations

General play style

This is one of the most dreaded tanks of its BR spread since it features a good canon and awesome mobility packed inside an heavily sloped thick armor that most APHE shells cannot penetrate. Use this tank in any role and situation, it will surely find its place on the battlefield.

Vehicle characteristics

Gun
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-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.

Mobility
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).

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 your frontal armor, as the extremely angled turret armor 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. The left hand side of the turret mantlet is also a small weakspot, hard to hit but devastating if you take a shot there. A shot to the this part of the mantlet will destroy the cannon breach as well as killing both the gunner and commander, and it also has a chance to detonate ammo if there is any in the back of the turret.

Tactics

Specific enemies worth noting

Any enemy can kill you in one hit, so try to get the first shot off.

Counter-tactics

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 unangled 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 kill the commander and gunner, disabling the tank (some large calibre rounds can even knock out the loader and/or driver, resulting in a one-shot kill). This strategy is unapplicable 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, kill the commander and gunner and destroy the cannon breach. 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 a one shot kill.

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 the kill and aim turret back.

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

Pros and cons

Pros:

  • Reload rate considerably faster than usual 122 mm for its BR, default is only half a second slower than the T-10M
  • 12.7 mm DShK allows for defence against aircraft and lightly-armoured vehicles
  • Excellent 100 mm sloping armour on front and sides
  • Sleek turret design makes it a smaller target
  • Lower glacis is thicker than the upper glacis (120 mm vs 100 mm), though not as sloped
  • Suspension wheels, torsion bars, and tracks allow for better protection on lower side hull
  • Agile despite its weight and heavy armour
  • 150 mm gun mantlet cannot be penetrated by most German guns, due to its 50 mm spaced armour (cannot be normally seen in hangar)
  • Good reverse speed
  • Premium vehicle bonuses
  • Very small weak spots at long distances
  • Optics and MG can stop most shrapnel from killing crew and damaging gun breach, which benefits even more from the 50 mm spaced plate

Cons:

  • Inadequate ammunition against some upper tier vehicles such as Maus
  • Very poor gun depression due to sleek turret design
  • Ammunition is strewn all over the hull fighting compartment
  • Its sloped armour can be defeated by high caliber British HESH and American HEAT-FS
  • 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
  • Can be destroyed by artillery

Specifications

Arcade Realistic Simulator

Arcade Realistic Simulator

Arcade Realistic Simulator

Armaments

1 x 122 mm D-30T cannon (30 rounds)
1 x 12.7 mm DShK machine gun (300 Rounds)
1 x 7.62 mm DT machine gun (2,000 Rounds)

Main armament

1 x 122 mm D-30T cannon
  • Ammunition Capacity: 30 Shells
  • Gun Depression: -3°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 8.3°/s (Stock), 11.5°/s (Upgraded), __._°/s (Upgraded + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reload Rate: 20.5s (Stock), __._s (Full Crew), __._s (Prior + Expert Qualif.), __._s (Prior + Ace Qualif.)
1 x 122 mm D-30T cannon
  • Ammunition Capacity: 30 Shells
  • Gun Depression: -3°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 8.3°/s (Stock), 9.8°/s (Upgraded), __._°/s (Upgraded + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reload Rate: 20.5s (Stock), __._s (Full Crew), __._s (Prior + Expert Qualif.), __._s (Prior + Ace Qualif.)
1 x 122 mm D-30T cannon
  • Ammunition Capacity: 30 Shells
  • Gun Depression: -3°
  • Gun Elevation: 20°
  • Turret Rotation Speed: 8.3°/s (Stock), 9.8°/s (Upgraded), __._°/s (Upgraded + Full Crew), __._°/s (Prior + Expert Qualif.), __._°/s (Prior + Ace Qualif.)
  • Reload Rate: 20.5s (Stock), __._s (Full Crew), __._s (Prior + Expert Qualif.), __._s (Prior + Ace Qualif.)
Ammunition
Ammunition Penetration in mm @ 0° Angle of Attack Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay
in m:
Fuse sensitivity
in mm:
Explosive Mass in
TNT equivalent
in g:
Normalization At 30°
from horizontal:
Ricochet:
10m 100m 500m 1000m 1500m 2000m 0% 50% 100%
BR-471 200 196 179 158 141 125 APHE 795 25 1.2 15 272 -1° 47° 60° 65°
BR-471B 207 201 183 162 144 129 APHEBC 800 25 1.2 15 272 +4° 48° 63° 71°
OF-471 36 36 36 36 36 36 HE 800 25 0.1 0.1 3,600 +0° 79° 80° 81°
Ammo racks
Ammo racks of the IS-6.
Full
ammo
Ammo
Part
1st
rack empty
2nd
rack empty
3rd
rack empty
4th
rack empty
5th
rack empty
6th
rack empty
7th
rack empty
Recommendations Comments Visual
discrepancy
30 Projectiles
Propellants
17 (+13)
25 (+5)
13 (+17)
19 (+11)
(+21)
13 (+17)
(+23)
(+23)
(+25)
(+27)
(+27)
 
(+29)
 
Turret empty: 13 (+17) Projectile racks 1 and 2 deplete steadily together until empty no

Secondary armaments

1 x 12.7 mm DShK machine gun (pintle-mount)
1 x 7.62 mm DT machine gun (coaxial)

Crew

  • Commander
  • Gunner
  • Loader
  • Driver

Total: 4 crew members

Armour

Armour type:

  • Rolled homogeneous armour (Hull, Turret roof)
  • Cast homogeneous armour (Turret, Cupola)
Tank Armour Table
Armour Front 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
Armour Sides Roof
Cupola 100 mm 30 mm

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.

Engine & mobility

Weight: 51.1 ton

Max Speed: 47 km/h
Stock

  • Engine Power: 904 hp @ 2550 rpm
  • Power-to-Weight Ratio: 17.69 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 1113 hp @ 2550 rpm
  • Power-to-Weight Ratio: 21.78 hp/ton
  • Maximum Inclination: 43°
Weight: 51.1 ton

Max Speed: 44 km/h
Stock

  • Engine Power: 619 hp @ 2550 rpm
  • Power-to-Weight Ratio: 12.11 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 700 hp @ 2550 rpm
  • Power-to-Weight Ratio: 13.70 hp/ton
  • Maximum Inclination: 41°
Weight: 51.1 ton

Max Speed: 44 km/h
Stock

  • Engine Power: 619 hp @ 2550 rpm
  • Power-to-Weight Ratio: 12.11 hp/ton
  • Maximum Inclination: 40°

Upgraded

  • Engine Power: 700 hp @ 2550 rpm
  • Power-to-Weight Ratio: 13.70 hp/ton
  • Maximum Inclination: 41°

Modules and improvements

Tier Mobility Protection Firepower
I Tracks tank module.jpg Parts tank module.jpg Horizontaldrive tank module.jpg
II Suspension tank module.jpg Brakesystem tank module.jpg FPE tank module.jpg Adjustmentoffire tank module.jpg APHEBC BR471B tank module.jpg
III Filters tank module.jpg Crewreplenishment tank module.jpg Elevationmechanism tank module.jpg
IV Transmission tank module.jpg Engine tank module.jpg

Recommendation:
This tank is a premium tank that comes with everything unlocked.

History of creation and combat usage

The Chelyabinsk Kirov Plant Work (ChKZ) began planning a draft of a new heavy tank with an electrotransmission in 02 May 1944,[1] a drive system seen 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 other ways than just the transmission. Object 252 used the mechanical transmission from the IS-3, with large road wheels with no track rollers for its torsion bar suspension.[4] Object 253 with its electric transmission used a suspension that looked similar 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 implements features the D-25's monobloc, 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 IS-6 two prototypes proved disappointing, with the Object 253 electric transmission being too complex, expensive, and unreliable.[7] The Object 252 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.[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]

Screenshots and fan art

Skins and camouflages for the SM.79 series from live.warthunder.com.

Additional information (links)

[Devblog] IS-6: the Soviet Hammer

References

  1. TankArchives 2014
  2. Kinnear 2017, Appendix One
  3. TankArchives 2016, "Launch of the IS-6"
  4. 4.0 4.1 Boldyrev 2011
  5. 5.0 5.1 5.2 TankArchives 2016, "Object 257"
  6. TankArchives 2013
  7. Kinnear 2017, Chapter One

Sources

  • Boldyrev, Eugeni. "Last Heavy Tanks of the USSR." The Russian Battlefield. N.p., 18 Sept. 2011. Web. 08 Jan. 2018. Website.
  • Kinnear, James, and Stephen L. Sewell. Soviet T-10 Heavy Tank and Variants. N.p.: Osprey Pub, 2017. Print.
  • TankArchives. "D-30 Gun for the IS-6." Tank Archives. N.p., 19 Sept. 2013. Web. 08 Jan. 2018. Website.
  • TankArchives. "Electrical Transmission." Tank Archives. N.p., 02 June 2014. Web. 08 Jan. 2018. Website.
  • TankArchives. "Object 257: The First IS-7." Tank Archives. N.p., 12 June 2016. Web. 08 Jan. 2018. Website.
  • TankArchives. "Launch of the IS-6." Tank Archives. N.p., 20 Dec. 2016. Web. 08 Jan. 2018. Website.
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ussr_is_6.png

Icon-country-sov.png IS-6
Nation USSR
Type Heavy tank
Rank 4
Battle Rating
7.3
7.3
7.3

   Metric✓       Imperial   

   Metric       Imperial✓   

Characteristics
Weight
51,100 kg
112,656 lb
Number of Crew 4
Hull armour thickness
100/100/60/20 mm
3.94/3.94/2.36/0.79 inches
Statistics
Engine power (stock)
904 hp
619 hp
619 hp
Engine power (upgraded)
1,113 hp
700 hp
700 hp
HP/ton ratio (stock)
17.69
17.97
12.11
12.31
12.11
12.31
HP/ton ratio (Upgraded)
21.78
22.13
13.70
13.92
13.70
13.92
Max speed
47 km/h
29.3 mph
44 km/h
27.5 mph
44 km/h
27.5 mph
Main Weapon
1 x 122 mm D-30T Cannon
Ammo stowage 30 rounds
Vertical guidance -3°/20°
Secondary Weapon
1 x DShK Heavy machine gun
Ammo stowage 300 rounds
Mount Pintle mount
Vertical guidance -4°/85°
1 x DT Mchine gun
Ammo stowage 2,000 rounds
Mount Coaxial
Economy
Required RP N/A
Vehicle cost N/A
Crew training cost 10,000 SL
Max repair cost*
3,550 SL
4,290 SL
4,760 SL
Free repair time (Stock)
3d 09h
6d 18h
6d 18h
Free repair time (Upgraded)
1d 03h
2d 06h
2d 06h
Warning: this sidebar is a WIP and can be incorrect. Last updated 1.75.0.208.