IS

From World Of Tanks
Jump to: navigation, search


IS

Render
USSR Heavy Tank Tier VII
Battle Tiers
123456789101112
Totals
Cost 1,424,000  Credits
Hit Points 1,1301,230 HP
Weight Limit 44.9/47.546.225/48.4 t
Crew
Commander (Radio Operator)
Gunner
Driver
Loader
Mobility
Engine Power 600700 hp
Speed Limit 34/14 km/h
Traverse 3235 deg/s
Power/Wt Ratio 13.3615.14 hp/t
Pivot NoNo
Armor
Hull Armor 120/90/60 mm
Turret Armor100/90/90100/90/90 mm
Armament
Damage 120-200292.5-487.5 HP
Penetration 90-150131-219 mm
Rate of Fire
12.24100% crew: 12.77 rpm
+ Vents: 13.06 rpm
+ BiA : 13.35 rpm
+ Food: 13.92 rpm
4.88100% crew: 5.09 rpm
+ Vents: 5.2 rpm
+ BiA : 5.32 rpm
+ Food: 5.55 rpm
r/m
Accuracy
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
Aim time
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
3.4100% crew: 3.26 s
+ Vents: 3.19 s
+ BiA : 3.12 s
+ Food: 2.99 s
s
Turret Traverse
38100% crew: 39.63 deg/s
+ Vents: 40.52 deg/s
+ BiA : 41.42 deg/s
+ Food: 43.21 deg/s
28100% crew: 29.2 deg/s
+ Vents: 29.86 deg/s
+ BiA : 30.52 deg/s
+ Food: 31.84 deg/s
deg/s
Gun Arc 360°
Elevation Arc -5°/+22°-6°/+25°
Ammo Capacity 6826 rounds
General
Chance of Fire 1512 %
View Range
330100% crew: 330 m
+ Vents: 337.07 m
+ BiA : 344.14 m
+ Food: 358.29 m
350100% crew: 350 m
+ Vents: 357.5 m
+ BiA : 365 m
+ Food: 380 m
m
Signal Range
440100% crew: 458.86 m
+ Vents: 469.23 m
+ BiA : 479.6 m
+ Food: 500.34 m
625100% crew: 651.79 m
+ Vents: 666.52 m
+ BiA : 681.25 m
+ Food: 710.71 m
m
Parent Contour-USSR-KV-1s.pngContour-USSR-KV-13.png
Child
Contour-USSR-IS-3.png77,000 XP
Research
RT-USSR-IS.jpg
Values are Stock - click for Top
USSR-IS.png

The IS is a Soviet tier 7 heavy tank.

The IS ("Iosef Stalin"), with its 122 mm gun, was an unpleasant surprise for the Wehrmacht. Produced from October 1943 through June 1945, with a total of 107 of the IS-1 vehicles and 3,483 of the IS-2 version manufactured.

It is the first of the Iosef Stalin class tanks available to the player. The IS represents both the IS-2 and the early model IS-1. The IS can be researched from the KV-1S or from the KV-13, which is sometimes is used as an easy grind bridge. The stock tank is the IS-1, equipped with the 85mm gun also available on the KV-1S. The IS is a continuation of the KV-1S and will thus feel very similar in terms of agility and speed. When equipped with a 122mm gun, it technically becomes an IS-2, which will feel much more potent when engaging other heavies. Like most Soviet heavy tanks, the IS fares much better engaging enemies at close range where the IS can hug cover and back off when it is reloading. Thus, the IS is better for maps such as Himmelsdorf where there are mostly close-quarters fighting and no big open areas. The frontal armor on the IS is decent enough to bounce a lot of shots from lower tiers and is surprisingly bouncy even towards other tier 7 tanks and higher tier tanks if you angle the tank properly. Play this tank smartly, hit your enemy, pull back to reload and hit your enemy again. You will find yourself doing massive amounts of damage to the enemy and if you play this tank properly, you can really help your team a lot.

The IS leads to the IS-3.


















Modules

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
06VI IS-85 0100 100/90/90 mm
38100% crew: 39.63 deg/s
+ Vents: 40.52 deg/s
+ BiA : 41.42 deg/s
+ Food: 43.21 deg/s
38100% crew: 39.63 deg/s
+ Vents: 40.52 deg/s
+ BiA : 41.42 deg/s
+ Food: 43.21 deg/s
d/s
360°
330100% crew: 330 m
+ Vents: 337.07 m
+ BiA : 344.14 m
+ Food: 358.29 m
330100% crew: 330 m
+ Vents: 337.07 m
+ BiA : 344.14 m
+ Food: 358.29 m
m
0------ 15,00015,000 Credits 7,200 7,200 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
06VI 85 mm D-5T 68 160/160/280 HP 120/161/43 mm 109 Credits/7 Gold/98 Credits
12.24100% crew: 12.77 rpm
+ Vents: 13.06 rpm
+ BiA : 13.35 rpm
+ Food: 13.92 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-5°/+22° --- 61,53061,530 Credits 1,500 1,500 kg
07VII 85 mm D5T-85BM 68 180/180/300 HP 144/194/44 mm 150 Credits/7 Gold/139 Credits
10.34100% crew: 10.79 rpm
+ Vents: 11.03 rpm
+ BiA : 11.28 rpm
+ Food: 11.76 rpm
r/m
0.37100% crew: 0.35 m
+ Vents: 0.35 m
+ BiA : 0.34 m
+ Food: 0.33 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+25° 15,500 73,60073,600 Credits 1,850 1,850 kg
07VII 100 mm D10T 36 250/250/330 HP 175/235/50 mm 252 Credits/10 Gold/252 Credits
6.45100% crew: ? rpm
+ Vents: ? rpm
+ BiA : ? rpm
+ Food: ? rpm
r/m
0.42100% crew: 0.4 m
+ Vents: 0.39 m
+ BiA : 0.39 m
+ Food: 0.37 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+20° 16,500 78,18078,180 Credits 2,257 2,257 kg

Turret
TierNameArmorTraverse SpeedTraverse ArcView RangeXP CostPriceWeight
07VII IS-122 0100 100/90/90 mm
28100% crew: 29.2 deg/s
+ Vents: 29.86 deg/s
+ BiA : 30.52 deg/s
+ Food: 31.84 deg/s
28100% crew: 29.2 deg/s
+ Vents: 29.86 deg/s
+ BiA : 30.52 deg/s
+ Food: 31.84 deg/s
d/s
360°
350100% crew: 350 m
+ Vents: 357.5 m
+ BiA : 365 m
+ Food: 380 m
350100% crew: 350 m
+ Vents: 357.5 m
+ BiA : 365 m
+ Food: 380 m
m
12,20012,200 26,30026,300 Credits 7,500 7,500 kg
Guns compatible with this Turret:
Gun
TierNameAmmoDamagePenetrationShell PriceRate of FireAccuracyAim TimeElevationXP CostPriceWeight
06VI 85 mm D-5T 68 160/160/280 HP 120/161/43 mm 109 Credits/7 Gold/98 Credits
12.24100% crew: 12.77 rpm
+ Vents: 13.06 rpm
+ BiA : 13.35 rpm
+ Food: 13.92 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-5°/+22° --- 61,53061,530 Credits 1,500 1,500 kg
07VII 85 mm D5T-85BM 59 180/180/300 HP 144/194/44 mm 150 Credits/7 Gold/139 Credits
10.34100% crew: 10.79 rpm
+ Vents: 11.03 rpm
+ BiA : 11.28 rpm
+ Food: 11.76 rpm
r/m
0.37100% crew: 0.35 m
+ Vents: 0.35 m
+ BiA : 0.34 m
+ Food: 0.33 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+25° 15,500 73,60073,600 Credits 1,850 1,850 kg
07VII 100 mm D10T 36 250/250/330 HP 175/235/50 mm 252 Credits/10 Gold/252 Credits
6.45100% crew: ? rpm
+ Vents: ? rpm
+ BiA : ? rpm
+ Food: ? rpm
r/m
0.42100% crew: 0.4 m
+ Vents: 0.39 m
+ BiA : 0.39 m
+ Food: 0.37 m
m
2.9100% crew: 2.78 s
+ Vents: 2.72 s
+ BiA : 2.66 s
+ Food: 2.55 s
s
-7°/+20° 16,500 78,18078,180 Credits 2,257 2,257 kg
07VII 122 mm D-2-5T 26 390/390/465 HP 175/217/61 mm 1,025 Credits/12 Gold/608 Credits
4.08100% crew: 4.26 rpm
+ Vents: 4.35 rpm
+ BiA : 4.45 rpm
+ Food: 4.64 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
3.4100% crew: 3.26 s
+ Vents: 3.19 s
+ BiA : 3.12 s
+ Food: 2.99 s
s
-6°/+25° 17,000 84,98084,980 Credits 2,600 2,600 kg
08VIII 122 mm D-25T 26 390/390/465 HP 175/217/61 mm 1,025 Credits/12 Gold/608 Credits
4.88100% crew: 5.09 rpm
+ Vents: 5.2 rpm
+ BiA : 5.32 rpm
+ Food: 5.55 rpm
r/m
0.46100% crew: 0.44 m
+ Vents: 0.43 m
+ BiA : 0.42 m
+ Food: 0.4 m
m
3.4100% crew: 3.26 s
+ Vents: 3.19 s
+ BiA : 3.12 s
+ Food: 2.99 s
s
-6°/+25° 19,000 125,140125,140 Credits 2,590 2,590 kg

Engine
TierNamePowerFire ChanceTypeXP CostPriceWeight
07VII V-2IS 0600 600 hp 015 15 % Diesel --- 36,00036,000 Credits 0750 750 kg
09IX V-2-54IS 0700 700 hp 012 12 % Diesel 26,000 79,29079,290 Credits 0700 700 kg

Suspension
TierNameLoad LimitTraverse SpeedXP CostPriceWeight
06VI IS-1 47.547.5 t 03232 d/s ------ 12,99012,990 Credits 11,500 11,500 kg
07VII IS-2M 48.448.4 t 03535 d/s 8,1258,125 18,08018,080 Credits 11,500 11,500 kg

Radio
TierNameRangeXP CostPriceWeight
07VII 10RK
440100% crew: 458.86 m
+ Vents: 469.23 m
+ BiA : 479.6 m
+ Food: 500.34 m
440100% crew: 458.86 m
+ Vents: 469.23 m
+ BiA : 479.6 m
+ Food: 500.34 m
m
0--- --- 18,60018,600 Credits 0100 100 kg
09IX 12RT
625100% crew: 651.79 m
+ Vents: 666.52 m
+ BiA : 681.25 m
+ Food: 710.71 m
625100% crew: 651.79 m
+ Vents: 666.52 m
+ BiA : 681.25 m
+ Food: 710.71 m
m
5,600 5,600 33,60033,600 Credits 0110 110 kg

Historical Info

The IS ("Iosef Stalin"), with its 122mm gun, was an unpleasant surprise for the Germans. Produced from October, 1943, through June, 1945, with a total of 3,483 IS-2 and 107 IS-1.


Development and Preliminary Design

In the beginning of Operation Barbarossa, the KV was the Soviet's Heavy tank. German tanks of the time had difficulties engaging it, but after the Tiger appeared, the heavy KV proved inadequate. The tank was heavy, but poorly armed with the same gun as the much more mobile T-34 medium tank. Thus, a replacement was ordered. N.V. Tseits, recently released from a GULag, was appointed head designer of the new project.

The project first led to the KV-13 universal tank, which was supposed to have medium weight and heavy protection, with both turret and hull protected by cast armor. By sacrificing internal space, consumption of materials were minimized for a given armor protection, following instructions of the State Defense Committee's decree of 1942. The KV-13 was equipped with a 600hp engine, capable of reaching speeds up to 55 km/h, and used parts from both the T-34 and the KV. However, acceleration was poor and the tank suffered severe reliability problems. Despite improvements, the Soviet military lost interest in the project.

Despite this, the Experimental Tank Factory continued research and testing, led by N.F. Shamshuring after the death of Tseits. The design was now more based on the KV-1S. After the appearance of the German heavy Tiger tanks, the speed of development was increased and orders were placed for two Iosef Stalin (IS) prototypes, based on the design of the KV-13. One of the prototypes, the IS-1 (factory designation: Object No.233), was armed with a 76.2mm gun, the other, the IS-2 (factory designation: Object No.234) was armed with the 122mm U-11 howitzer. Both tanks had better armor protection, a higher speed and equal or better armament than the KV-1S. Problems with the engine and transmission were solved while factories prepared for the production of the new vehicles.

After the first data about the German Tiger tank became available, it turned out that the 85mm AA-gun 52-K model 1939 was the most effective against its armor. It could penetrate the 100mm frontal armor from 1000m. New 85mm guns based on the 52-K model were developed, the D-5T gun ultimately being the chosen gun for further development. The IS-1 was ordered into production, together with an order for the development of an IS with a 122mm gun, based on the 122mm Field Cannon A-19 Model 1931, which proved to be the most effective anti-tank gun in the battle of Kursk. During tests, the 122mm was able to throw a Panther several meters back with a penetrating shot in its side armor. Other tests were done with a 100mm gun, but this gun was not available in large numbers and ultimately scrapped.

The first IS-1s (85mm) were produced in October 1943, the first IS-2s (122mm) in December. Production of the IS-1 was quickly stopped in January 1944, in favor of the IS-2. Only 107 IS-1s would be produced.

In combat, the 122mm with regular sharp-nosed APHE ammunition, did not prove to be very effective against Tigers (penetration from 1200 meters) and the sloped Panthers (penetration from 600-700 meters). Soviet designers noticed that the blunt-nosed HE ammunition was much more effective against sloped armor. It caused cracking of the armor and could tear off the whole front armor plate at the seam weld. However, in 1944 the problems of the APHE round also disappeared as the German tanks decreased in armor quality due to lack of materials and the Soviet ammunition improved in quality. The IS-2 also improved in quality: from 1944 onwards, the front armor was tempered to a very high hardness, leading to better protection, but higher production costs.

Despite this, the armor protection of the IS-2 was still lower than expected: a Soviet 76.2 mm Gun ZiS-3 could penetrate it from all sides at a distance of 600-700 meters. Not all shots penetrated, but the impacts also caused armor splintering and fragmentation inside the turret. As a result, many many ISs were lost during the winter and spring of 1944. Further modifications meant the German 88mm guns could not penetrate its front armor at point-blank range from an angle of 30 degrees. The turret could not be further modified. The 122mm already caused major imbalances (as the turret was designed for the 85mm gun) and increased armor would result in even more problems. Some smaller improvements to the turret led to an AA-gun and an improved periscope.


Production

Soviet tank doctrine focused on only two tanks, the Medium T-34 tank and successors, and the Heavy IS-2 tank. In total 3,483 IS-2s and 107 IS-1s were produced. Afterwards, production shifted to its successors, the IS-3 and IS-4.


Combat Deployment

The IS-2 tank was designed as a breakthrough tank and proved very effective during the course of the war. The separate breakthrough regiments, previously equipped with KV tanks, could field the new tanks from February 1944 onwards, receiving the "Guards" status in the process. Each regiment of 375 men in total consisted of 21 tanks (4 companies of 5 tanks and a commander tank), a SMG infantry company (riding on the tank), an anti-aircraft battery, a sapper platoon, a medical platoon, and a signal platoon.

The tank crew was, due to formations of new regiments, partly inexperienced. Each tank had four crew members: two lieutenants (the tank commander and the driver) and two sergeants (the loader and the gunner). The big disadvantage of this setup was that the tank commander had a secondary task: operating the radio. This meant that he could not fully concentrate on the battlefield.

The new tanks first saw action on February 15, 1944, during the Korsun-Shevcheskovsk Operation. 5 IS-1 tanks were ordered to help the 109th tank brigade in the assault on Lisyanka village in Ukraine. When the Soviet tanks approached within 600-700 meters, the Germans opened fire and knocked out all Soviet tanks. However, the village was captured the next day.

The first IS versus Tiger battle occurred on the first of March 1944. 1 IS-1 was destroyed and two were crippled after the German Tigers opened fire at a distance of 1500 to 1800 meters. Two Tiger tanks were damaged. More IS-1s were damaged by artillery and field guns and as a result, the Soviet military demanded higher armor quality and the cancellation of the 85mm gun.

The IS-2 was more successful. The 72nd regiment took part in fighting near Obertin between April 20 and May 10 and destroyed 41 Tiger I and Ferdinand tanks (it should be noted, however, that all German tank destroyers were labeled Ferdinand by the Soviets, most likely the Ferdinands were Stug IIIs in reality). Only 8 IS-2s were lost in the battle.

The Tiger II and the IS-2 only met on a few occasions. Generally this encounters resulted in high losses on both sides. The first and most successful battle happened between a single IS-2 and 7 King Tigers. The IS-2 ambushed the Tiger IIs and destroyed three of them. The other four retreated.

However, the main task of the IS-2 was not tank versus tank combat. The tank was especially potent against soft targets with its 25 kg HE shells. The appearance of the IS-2 meant the Soviets were now able to break through enemy lines defended by bunkers and AT-guns. At the very end of the war, the IS-2 was successful as a breakthrough tank in the Battle of Berlin, as it was able to destroy buildings with a single shot. At that point in the war, the main enemy of the IS-2 was not the Panther or King Tiger, but infantry with Panzerschrecks or Panzerfausts. 70% of the IS-2s destroyed in that battle were destroyed with these kind of weapons.


IS-2 After The War

In May 1945, production of the IS-2 stopped in favor of the new IS-3. However, the IS-2 was used until the 1970s by the Soviet, Chinese, and North Korean army. The last time the IS-2 was used was during training in 1982, but the vehicle was only definitely scrapped in the 1990s.


Conclusion

During the later stages of the war, the IS series was a primary Soviet tank, mainly used to break through enemy lines. It was the first Soviet tank that was able to face a Tiger or King Tiger one on one. In that role, it did not only have tactical value, but also acted as the model for the turn of the war. Soviet morale received a boost after the employment of these tanks.

The IS-2 was on paper a Heavy tank, but it was more mobile and agile than its predecessor, the KV. Internal space was sacrificed for performance and cost saving.

The IS-2 was the main tank in the final battle on the Soviet front, the Battle of Berlin. It proved to be an excellent fighter in the streets of the German capital.

Model

Number Built

Armament in turret

3.7cm ammunition

M.G. ammunition

Armor (carbon steel)

Crew

Engine

Horsepower

Power to weight ratio

Maximum speed (km/h)

Fuel capacity

Range (km)

Transmission

Steering

Length (m)

Width (m)

Height (m)

Wheelbase (m)

Total Weight (metric tons)

Roadwheels per side

Pairing

Number of support points

Roadwheel diameter

Roadwheel width

Track Type

Track Width (mm)

Track Pitch (mm)

Track Links per side

Track length (m)

Track contact length (m)

Support length (m)

Ground Pressure (kg/cm2)

Ground Clearance (mm)

IS-110785mm D-5T592,52060-160mm4W-2-IS V-1260014.1 hp/t378001508-speedClutch brake8.563.072.73-4461-2-2-13--Steel65015987-90-4.3-0.78460
IS-23,483122mm D-25T282,52060-160mm4W-2-IS V-1260011.3 hp/t378001508-speedClutch brake8.833.072.73-4661-2-2-13--Steel65015987-90-4.3-0.8460


Personal tools
Namespaces
Variants
Actions
Navigation
Toolbox
In other languages