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IS-M

AnnoR139_IS_M.png
Battle Tier
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Overview
Mouse over "
Well, the ones further down, of course.
" for more information
[Client Values; Actual values in
Specifically, the mismatch in crew values caused by commander's 10% crew skill bonus. Outside of a crew of 1 commander only, 100% crew is a fiction. The client values, given for 100% crew, will normally be taken into battle with 110% crew skill members aside from specific functions, causing their actual performance to deviate from the expected client value. These differences are taken into account in tooltip boxes.
]
2,550,000  Credits Cost
14001500 HP Hit Points
49.78/5655/60 t Weight Limit
Crew
  1. Commander (Radio Operator)
  2. Driver
  3. Gunner
  4. Loader
Mobility
650750 hp Engine Power
35/12 km/h Speed Limit
2426 deg/s Traverse
13.0613.64 hp/t Power/Wt Ratio
NoNo Pivot
Armor
130/120/80 mm Hull Armor
100/100/100250/140/120 mm Turret Armor
Armament







{{#ifeq:ARMOR_PIERCING_CR|ARMOR_PIERCING||



{{#ifeq:HIGH_EXPLOSIVE|ARMOR_PIERCING||


AP/APCR/HE







{{#ifeq:ARMOR_PIERCING_CR|ARMOR_PIERCING||



{{#ifeq:HIGH_EXPLOSIVE|ARMOR_PIERCING||


AP/APCR/HE
Shells




















1025/4800/608




















1025/4800/608
Shell Cost
390/390/530390/390/530 HP Damage
175/217/61212/240/68 mm Penetration



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4.51 r/m 

Standard Gun

Reload Times
Nominal: 13.3 s
50% Crew: 16.48 s
75% Crew: 14.39 s
100% Crew: 12.75 s
Rammer: 11.48 s
Vents: 12.47 s
Both: 11.22 s
Both and BiA: 10.98 s
Both and Max Crew %: 10.52 s

See Crew, Consumables, or Equipment for more information.



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5.13 r/m 

Standard Gun

Reload Times
Nominal: 11.7 s
50% Crew: 14.49 s
75% Crew: 12.66 s
100% Crew: 11.22 s
Rammer: 10.1 s
Vents: 10.97 s
Both: 9.88 s
Both and BiA: 9.66 s
Both and Max Crew %: 9.26 s

See Crew, Consumables, or Equipment for more information.
Rate of Fire






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1758.9

Standard Gun

Using Shell Type 1 (390 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1758.9
50% Crew: 1419.6
75% Crew: 1626.3
100% Crew: 1833
100% Crew
Vents: 1875.9
Rammer: 2035.8
Both: 2082.6
Both and BiA: 2129.4
Both and Max Crew %: 2219.1

Advantageous Damage Per Minute
First-shot DPM: 2148.9
50% Crew: 1809.6
75% Crew: 2016.3
100% Crew: 2223
100% Crew
Rammer: 2425.8
Vents: 2265.9
Both: 2472.6
Both and BiA: 2519.4
Both and Max Crew %: 2609.1

See here, here, or here for more information.

Standard Gun

Using Shell Type 2 (390 Damage):


Theoretical Damage Per Minute
Nominal DPM: 1758.9
50% Crew: 1419.6
75% Crew: 1626.3
100% Crew: 1833
100% Crew
Vents: 1875.9
Rammer: 2035.8
Both: 2082.6
Both and BiA: 2129.4
Both and Max Crew %: 2219.1

Advantageous Damage Per Minute
First-shot DPM: 2148.9
50% Crew: 1809.6
75% Crew: 2016.3
100% Crew: 2223
100% Crew
Rammer: 2425.8
Vents: 2265.9
Both: 2472.6
Both and BiA: 2519.4
Both and Max Crew %: 2609.1

See here, here, or here for more information.

Standard Gun

Using Shell Type 3 (530 Damage):
With wholly penetrating hits

Theoretical Damage Per Minute
Nominal DPM: 2390.3
50% Crew: 1929.2
75% Crew: 2210.1
100% Crew: 2491
100% Crew
Vents: 2549.3
Rammer: 2766.6
Both: 2830.2
Both and BiA: 2893.8
Both and Max Crew %: 3015.7

Advantageous Damage Per Minute
First-shot DPM: 2920.3
50% Crew: 2459.2
75% Crew: 2740.1
100% Crew: 3021
100% Crew
Rammer: 3296.6
Vents: 3079.3
Both: 3360.2
Both and BiA: 3423.8
Both and Max Crew %: 3545.7

See here, here, or here for more information.






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2000.7

Standard Gun

Using Shell Type 1 (390 Damage):


Theoretical Damage Per Minute
Nominal DPM: 2000.7
50% Crew: 1614.6
75% Crew: 1848.6
100% Crew: 2086.5
100% Crew
Vents: 2133.3
Rammer: 2316.6
Both: 2371.2
Both and BiA: 2421.9
Both and Max Crew %: 2527.2

Advantageous Damage Per Minute
First-shot DPM: 2390.7
50% Crew: 2004.6
75% Crew: 2238.6
100% Crew: 2476.5
100% Crew
Rammer: 2706.6
Vents: 2523.3
Both: 2761.2
Both and BiA: 2811.9
Both and Max Crew %: 2917.2

See here, here, or here for more information.

Standard Gun

Using Shell Type 2 (390 Damage):


Theoretical Damage Per Minute
Nominal DPM: 2000.7
50% Crew: 1614.6
75% Crew: 1848.6
100% Crew: 2086.5
100% Crew
Vents: 2133.3
Rammer: 2316.6
Both: 2371.2
Both and BiA: 2421.9
Both and Max Crew %: 2527.2

Advantageous Damage Per Minute
First-shot DPM: 2390.7
50% Crew: 2004.6
75% Crew: 2238.6
100% Crew: 2476.5
100% Crew
Rammer: 2706.6
Vents: 2523.3
Both: 2761.2
Both and BiA: 2811.9
Both and Max Crew %: 2917.2

See here, here, or here for more information.

Standard Gun

Using Shell Type 3 (530 Damage):
With wholly penetrating hits

Theoretical Damage Per Minute
Nominal DPM: 2718.9
50% Crew: 2194.2
75% Crew: 2512.2
100% Crew: 2835.5
100% Crew
Vents: 2899.1
Rammer: 3148.2
Both: 3222.4
Both and BiA: 3291.3
Both and Max Crew %: 3434.4

Advantageous Damage Per Minute
First-shot DPM: 3248.9
50% Crew: 2724.2
75% Crew: 3042.2
100% Crew: 3365.5
100% Crew
Rammer: 3678.2
Vents: 3429.1
Both: 3752.4
Both and BiA: 3821.3
Both and Max Crew %: 3964.4

See here, here, or here for more information.
Damage Per Minute


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0.45 m 

With 50% Crew: 0.557 m
With 75% Crew: 0.487 m
With 100% Crew: 0.431 m
With BiA: 0.422 m
With BiA and Vents: 0.413 m
Maximum possible: 0.396 m

For more details, see Crew


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0.42 m 

With 50% Crew: 0.52 m
With 75% Crew: 0.454 m
With 100% Crew: 0.403 m
With BiA: 0.394 m
With BiA and Vents: 0.385 m
Maximum possible: 0.369 m

For more details, see Crew
Accuracy


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3.4 s 

With 50% Crew: 4.212 s
With 75% Crew: 3.678 s
With 100% Crew: 3.26 s
With GLD: 2.964 s
With BiA: 3.188 s
With BiA and Vents: 3.119 s
With both and GLD: 2.835 s
Maximum possible: 2.718 s

For more details, see Crew or Equipment


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3 s 

With 50% Crew: 3.716 s
With 75% Crew: 3.245 s
With 100% Crew: 2.877 s
With GLD: 2.615 s
With BiA: 2.813 s
With BiA and Vents: 2.752 s
With both and GLD: 2.502 s
Maximum possible: 2.398 s

For more details, see Crew or Equipment
Aim time
3032 deg/s Turret Traverse
360° Gun Arc
-5°/+20°-5°/+20° Elevation Arc
3030 rounds Ammo Capacity
General
1515 % Chance of Fire






340 m 

With 50% Crew: 267.1 m
With 75% Crew: 303.6 m
With 100% Crew: 340 m
With Recon and Situational Awareness: 357.2 m
With Coated Optics: 374 m
With Binocular Telescope: 425 m
Maximum possible: 486.7 m

For more details, see Skills or Equipment






350 m 

With 50% Crew: 275 m
With 75% Crew: 312.5 m
With 100% Crew: 350 m
With Recon and Situational Awareness: 367.7 m
With Coated Optics: 385 m
With Binocular Telescope: 437.5 m
Maximum possible: 501.1 m

For more details, see Skills or Equipment
View Range


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440 m 

With 50% Crew: 345.7 m
With 75% Crew: 392.9 m
With 100% Crew: 440 m
With 100% Signal Boost: 528 m
When affected by 100% Relaying: 484 m
Maximum possible: 633.1 m

For more details, see Skills or Equipment


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625 m 

With 50% Crew: 491.1 m
With 75% Crew: 558.1 m
With 100% Crew: 625 m
With 100% Signal Boost: 750 m
When affected by 100% Relaying: 687.5 m
Maximum possible: 899.3 m

For more details, see Skills or Equipment
Signal Range
Values are Stock - click for Top


VIII

AnnoR139_IS_M.png

2550000

The IS-M is a Soviet tier 8 heavy tank.

The IS-2Sh (IS-M) was a project for the significant modification of the IS-2 proposed by N. F. Shashmurin at Kirov Factory No. 100 in early 1944. The design featured a long-barrel 122 mm gun and a rear placement of the fighting compartment. The project was discontinued in favor of the IS-6 (Object 252).

The IS-M leads to the Object 705.

Modules / Available Equipment and Consumables

Modules

Ico_gun_alpha.png

Guns

Tier Gun Penetration
(mm)
Damage
(HP)
Rate of fire
(rounds/minute)
Dispersion
(m/100m)
Aiming time
(s)
Weight
(kg)
Price
(Credits)

VIII 122 mm D-25T 175/217/61 390/390/530 4.51 0.44 3.4 2590 125140
IX 122 mm D-25BM 212/240/68 390/390/530 5.13 0.42 3 2800 144000

Ico_turret_alpha.png

Turrets

Tier Turret Turret Armor (front/sides/rear)
(mm)
Turret Traverse Speed
(deg/s)
View Range
(m)
Weight
(kg)
Price
(Credits)

VII IS-M 100/100/100 30 340 7500 22000
VIII IS-BM 250/140/120 32 350 12500 33100

Ico_engine_alpha.png

Engines

Tier Engine Engine Power
(hp)
Chance of Fire on Impact
(%)
Weight
(kg)
Price
(Credits)

VIII M-40 650 650 15 1250 45000
IX M-40 750 750 15 1250 78000

Ico_suspension_alpha.png

Suspensions

Tier Suspension Load Limit
(т)
Traverse Speed
(gr/sec)
Rmin Weight
(kg)
Price
(Credits)

VII IS-M 56 24 B/2 11000 18000
VIII IS-BM 60 26 B/2 11000 32500

Ico_radio_alpha.png

Radios

Tier Radio Signal Range
(m)
Weight
(kg)
Price
(Credits)

VII 10RK 440 100 18600
IX 12RT 625 110 33600

Compatible Equipment

Vertical Stabilizer Mk 2 Heavy Spall Liner Camouflage Net Fill Tanks with CO2 Coated Optics Stabilizing Equipment System Experimental Optics Wear-Resistant Gun Laying Drive Venting System Innovative Loading System Extended Spare Parts Kit Enhanced Gun Laying Drive Enhanced Torsion Bars 5+ t Class Cyclone Filter Improved Ventilation Class 3 Large-Caliber Tank Gun Rammer Binocular Telescope Toolbox "Wet" Ammo Rack Class 2 

Compatible Consumables

Stabilizer Greasing Automatic Fire Extinguisher Natural Cover Optical Calibration Aim Tuning Experienced Firefighters Manual Fire Extinguisher Vent Purge Large First Aid Kit Large Repair Kit Duty Comes First Lend-Lease Oil Shell Organizer Orderly Ammo Rack Focus on Target Extra Combat Rations Removed Speed Governor Increased Focus Small First Aid Kit Small Repair Kit Gearbox Intricacy Steady Hand Pre-Battle Maintenance Combat Course 


Player Opinion

Pros and Cons

Pros:


  • Good top gun - high alpha damage and good DPM, handling and aimtime for its caliber
  • Very strong upgraded turret with almost no weakspots
  • Good at sidescraping
  • Surprisingly cheap to research, exp-wise, for a Tier VIII tank


Cons:


  • Poor mobility, even when upgraded
  • Poor viewrange
  • Limited gun depression
  • Terrible when stock - poor turret armor and inadequate penetration


Performance

The key to playing good in this tank is sidescraping whenever possible (at least against enemies up to tier VIII), and this tank can do it pretty well if handled properly. If you do not overangle and do not expose your weak lower plate, the only thing that should be able to touch you are HE shells. Turret has a weakspot in the form of commander cupola, but it is fairly small and hard to hit from a distance or when moving. However, frontal hull armor is no match for gold shells from tiers IX and X, so note that even sidescraping will not help you much - you will be easily penetrated in upper plate most of the time.

Mobility is a double-edged sword; straight-line driving is actually good, but traverse is horrible - IS-M turns like a boat and is very easily flanked. Never go alone anywhere in this tank.

Bad gun depression means that you cannot take hulldown positions easily, and you are better off avoiding hills and even slight bumps alltogether. Play in cities or behind cover on straight ground.

Penetration is OK for enemies up to tier VIII (mostly; good luck with VK 100.01P, or even another IS-M when sidescraping, for example), and completely inadequate for frontal engagements against other heavies. Pick softer targets if opportunities present themselves. Your good alpha damage and DPM will help in that regard as well.

Overall, stick to other heavies and sidescrape on city maps. On open maps, play as a 2nd line support for your higher tier heavies. When top tier, armor can withstand a lot if angled, but is otherwise easily penetrated by nearly anyone, especially with premium ammo.

As a sidenote, when stock, this tank performs horribly in all aspects (horrible pen and mobility, no armor whatsoever, complemented with very low view range and almost no camo) and it is highly recommended to use free exp to unlock as many modules as possible.


Early Research

  • Research turret first, since stock turret has downright laughable armor
  • Research the upgraded gun for much needed penetration boost
  • Research the 2nd engine
  • Tracks are not required for other modules, so you can research them last


Suggested Equipment


Tank Gun Rammer Vertical Stabilizer Improved VentilationEnhanced Gun Laying Drive 


Gallery

Historical Info

The IS project started as an improvement over previous KV designs, combining the hull developed for the KV-13 prototypes with the new KV-85 three-man turret. The 85mm gun of the IS-1, however, meant that the T-34/85 sporting the same gun performed better in almost every aspect, the IS only offering slightly better protection. Therefore, this variant, known as IS-85, was deemed insufficient for a breakthrough role. Demands for a 122 or a 152 mm gun were made (despite the ISU-152 already being accepted into service). Kotin himself proposed the use of the A-19 gun, citing its effectiveness against concrete bunkers and enemy tanks alike. The choice of a new 122 mm (4.8 in) gun was studied by Kotin’s team at Zavod Nr.9. As shown at Kursk, the 122 and 152 mm (5.98 in) guns were better suited to take on on the new German tanks, the Tiger, Panther and Elefant. It was obvious that, aside the 85 mm (3.35 in) gun, more suitable for the next evolution of the T-34, a 122 mm would be most recommended to be fitted on the new heavy tank. The gun was equipped with a muzzle brake, despite protests that it would be too noticeable when firing, and installed in a D-5 gun mount. The resulting construction was named D-2T. The T-shaped muzzle brake failed during tests, and was replaced with a "German style" muzzle brake, similar to those used on 88 and 105 mm guns, after almost fatally injuring Marshall Voroshilov during a test in the presence of the Main Defense Commissariat. Later in the tank's life, it was again replaced with a domestic design. This version, known as IS-122, started the fruition of the IS-2 tank. The effects of the new tank gun were excellent: coupled with a new pointed AP shell, it could penetrate the front of a Panther at 1400 meters, and the front of a Tiger at 1800 meters.

The Shashmurin Project

Nikolai Fedorovich Shashmurin, a well-known tank designer, was busy with a brand new IS tank, an alternative to the IS-2. Really, the only things it shared with the IS-2 were the gun caliber and its breakthrough role. It even looked vastly different. Unofficially named the IS-2Sh (Sh = Shashmurin) or simply Shashmurin’s IS-2, it was a complete redesign of the IS. It featured a rear-mounted turret carrying the 122mm gun, large single roadwheels and heavily sloped frontal hull armor. The engine was placed in the middle of the hull, with the driver at the bow cut of off from the rest of the crew. Only one drawing is known to exist of this design.

Characteristics

The plans for this project were lofty indeed: front armour impenetrable for Panther, Tiger, and Ferdinand guns at any range, side armour impenetrable at over 500 meters, an 800-1000 hp engine to get this massive armoured slab moving at 35 kph. Considering that the projected mass of the heavy tank would be 55 tons, that's not even that unthinkable. The fighting compartment was located in the rear, with an engine compartment in the center. This layout allowed to make a gun with a very long barrel, accelerating the shell to 1000 m/s, without it getting in the way of maneuvers. The transmission could be electric or mechanical. One of Shashmurin's projects was deemed viable, designated IS-2M, and began development. Unfortunately, the resources of the construction bureau tasked with the project were soon consumed by the IS-6. While the requirement for impenetrable front armour seems impossible, the IS-3 managed to pull it off in that same year.



USSR
Light Tanks IMS-1 IIBT-2 IIT-45 IIT-26 IIT-60 IITetrarch IIIBT-7 IIIBT-SV IIILTP IIIM3 Light IIIBT-7 artillery IIIT-127 IIIT-46 IIIT-70 IVA-20 IVT-80 IVValentine II VT-50 VIMT-25 VIT-50-2 VIILTG VIIILTTB VIIILT-432 IXT-54 ltwt. XT-100 LT
Medium Tanks IIIT-29 IVA-32 IVT-28E with F-30 IVT-28 VMatilda IV VT-34 shielded VT-34 VIA-43 VIT-34-85M VIT-34-85 Rudy VILoza's M4-A2 Sherman VIT-34-85 VIIA-44 VIIKV-13 VIIT-43 VIIT-44-122 VIIIObject 416 VIIIT-54 first prototype VIIIT-44-100 (B) VIIIT-44-100 (R) VIIIТ-44-100 (У) VIIISTG VIIISTG Guard VIIIT-44 IXObject 430 Version II IXObject 430 IXT-54 XObject 140 XObject 907 XT-22 medium XK-91 XObject 430U XT-62A
Heavy Tanks VChurchill III VKV-1S VKV-220-2 VKV-220-2 Beta Test VKV-1 VIKV-2 VIKV-2 (R) VIKV-85 VIObject 244 VIT-150 VIIIS VIIKV-3 VIIKV-122 VIIIS-2 VIIIIS-3 VIIIIS-6 VIIIIS-6 B VIIIKV-5 VIIIKV-4 VIIIIS-5 (Object 730) VIIIIS-3A VIIIKV-4 Kreslavskiy VIIIObject 252U Defender VIIIObject 252U VIIIIS-M IXT-10 IXObject 257 IXObject 705 IXST-I XIS-4 XIS-7 XObject 260 XObject 705A XObject 277 XObject 279 early
Tank Destroyers IIAT-1 IIISU-76M IIISU-76I IVSU-85A VSU-85 VSU-85I VISU-100 VISU-100Y VIIISU-122S VIISU-152 VIISU-100M1 VIISU-122-44 VIIIISU-152 VIIIISU-130 VIIIT-103 VIIISU-130PM VIIISU-101 IXObject 704 IXObject 263 XObject 268 XObject 268 Version 4
Self-Propelled Artillery IISU-18 IIISU-26 IVSU-5 VSU-122A VISU-8 VIIS-51 VIISU-14-1 VIIISU-14-2 IX212A XObject 261
Heavy Tanks
USA VT14 VT1 Heavy Tank VIM6 VIIKing Tiger (Captured) VIIT29 VIIIChrysler K VIIIChrysler K GF VIIIT26E5 VIIIT26E5 Patriot VIIIM6A2E1 VIIIT32 VIIIT34 VIIIT34 B IXM103 XT110E5 XT57 Heavy Tank
UK VChurchill I VExcelsior VIChurchill VII VITOG II* VIIBlack Prince VIIFV201 (A45) VIIICaernarvon VIIICaernarvon Action X IXConqueror XFV215b XSuper Conqueror XT95/FV4201 Chieftain
Germany IVPz.Kpfw. B2 740 (f) IVDurchbruchswagen 2 VVK 30.01 (H) VITiger 131 VIVK 36.01 (H) VIIVK 45.03 VIITiger I VIITiger (P) VIIIVK 100.01 (P) VIIIVK 168.01 (P) VIIIVK 168.01 Mauerbrecher VIIILöwe VIIITiger II VIIIVK 45.02 (P) Ausf. A IXE 75 IXMäuschen IXVK 45.02 (P) Ausf. B XE 100 XPz.Kpfw. VII XMaus XVK 72.01 (K)
France IVB1 VBDR G1 B VIARL 44 VIIAMX M4 mle. 45 VIIIAMX 50 100 VIIIAMX M4 mle. 49 VIIIAMX M4 mle. 49 Liberté VIIIAMX 65 t VIIISomua SM VIIIFCM 50 t IXAMX 50 120 IXAMX M4 mle. 51 XAMX 50 B XAMX M4 mle. 54
USSR VChurchill III VKV-1S VKV-220-2 VKV-220-2 Beta Test VKV-1 VIKV-2 VIKV-2 (R) VIKV-85 VIObject 244 VIT-150 VIIIS VIIKV-3 VIIKV-122 VIIIS-2 VIIIIS-3 VIIIIS-6 VIIIIS-6 B VIIIKV-5 VIIIKV-4 VIIIIS-5 (Object 730) VIIIIS-3A VIIIKV-4 Kreslavskiy VIIIObject 252U Defender VIIIObject 252U VIIIIS-M IXT-10 IXObject 257 IXObject 705 IXST-I XIS-4 XIS-7 XObject 260 XObject 705A XObject 277 XObject 279 early
China VIIIS-2 VIIIWZ-111 VIIIWZ-111 Alpine Tiger VIII110 VIII112 IXWZ-111 model 1-4 X113 XWZ-111 model 5A
Japan IIIType 91 Heavy IVType 95 Heavy VO-I Experimental VIHeavy Tank No. VI VIO-I VIIO-Ni VIIIO-Ho IXType 4 Heavy XType 5 Heavy
Czechoslovakia
Sweden VIIIEmil I VIIIEMIL 1951 IXEmil II XKranvagn
Italy
Poland VII45TP Habicha VIII50TP prototyp VIII53TP Markowskiego IX50TP Tyszkiewicza X60TP Lewandowskiego
ja:Tank:R139 IS M