IS-2 Heavy Tank:
JS-2 Heavy Tank10,11:
Based on the IS-1 with a longer turret to accept the 122mm, which was designed by General F. Petrov. Initially had a single muzzle brake which later became a double.
Was demonstrated to the Main Defense Commissariat and was accepted for production on October 1943.8
The first one was finished in January 1944 at the Chelyabinsk factory.
Had a cast hull front which was uniformly sloped, not bent as in the IS-1.7 The ammunition was in 2 parts which slowed it's loading. First battle was in February 1944 at Korsun Shevcherkov (Chevchenkovski).
The 122 mm gun had a muzzle velocity of 2,562'/78 m per second.8 It could fire a APHE shell at a muzzle velocity of 2,600'/sec.10
A guard tank brigade had:
- 3 regiments
- 65 IS-2s each
IS-2m:
Improved fire control system which extended the effective range of the 122 mm. The driver had his observation hatch replaced by a sight slit.
| IS-2 | IS-2 1944 | IS-2 M | |
|---|---|---|---|
| Crew | Driver, loader, commander, gunner 43,4,5,8,9,10,11 |
41,2 | 41,2 |
| Physical Characteristics | |||
| Weight | 101,963 lb8, 99,200 lb, 45.3 tons3,11, 45.5 tons7 46 tons4,5,9, 46.1 tons6, 50.6 tons10 46,000 kg3,11, 46,250 kg8 |
46 tons2 | 49.6 tons1, 45,000 kg1 |
| Length w/gun | 31' 6.75"10, 32' 5.8"5, 32' 6"3,11, 32.8'8, 33' 10.75" 9.83 m6,9, 9.9 m3,4,5,11, 10.7 m8 |
9.83 m2 | 33' 6"1, 10.33 m1 |
| Length w/o gun | 21' 10"7 | 6.77 m2 | |
| Height | 8.9'8, 8' 11.5"5, 8' 11"3,11, 9'7,10, 9' 6.75" 2.73 m3,4,5,9,11, 2.74 m6, 2.9 m8 |
2.73 m2 | 2.92 m1, 9' 6"1 |
| Width | 10' 1.6"5, 10' 2"3,11, 10' 3"7, 11', 14' 3.25"10 3.07 m6,9, 3.09 m3,4,5,11 |
3.07 m2 | 3.36 m1, 11'1 |
| Width over tracks | |||
| Ground clearance | 13.75"10, 1' 4.5" 0.42 m4, 0.47 m9 |
0.46 m2 | |
| Ground contact length | 171.25"10 4.3 m9 |
||
| Ground pressure | 11.25 psi, 11.3 psi8, 11.66 psi, 12.6 psi10 0.8 (kg/cm2)8, 0.81 (kg/cm2)9, 0.82 (kg/cm2)4 |
0.8 kp/(cm2)2 | |
| Turret ring diameter | |||
| Armament | |||
| Main | 122 mm D-253,11 122 mm M1943 (D-25) L/438 122 mm D-25T6 122 mm4,5 122 mm L/437 122 mm M1943 (D-25)10 |
122 mm 1943 D-25 T2 | 122 mm1 |
| Secondary | |||
| MG | 3: 7.62 mm DT MG3 4: MGs4 7.62 mm MG5 12.7 mm MG5 2: 7.62 DT MG, coaxial, rear6 7.62 DT MG, AA (May 1944+)6 12.7 mm DShK, AA7 3: 7.62 mm DT MG, coaxial, hull, turret rear7 12.7 mm M1938 DshK, coaxial8 7.692 mm DT or DTM MG, hull8 12.7 mm DShK-38 MG10 3: 7.62 mm DT or DTM MG, coaxial, hull, turret rear10 3: 7.62 mm MG11 |
3: 7.62 mm DT MG, coaxial, hull, rear2, 1: 12.7 mm DSchK 38 AA2 | 12.7 mm AA1, 3: 7.62 mm MG1 |
| Side arms | |||
| Quantity | |||
| Main | 284,6,8,10 | 282 | |
| Secondary | |||
| MG | 12.7: 35010 7.62: 3,02410 2,6314 |
7.62: 2,3302 12.7: 2502 |
|
| Side arms | |||
| Armor Thickness (mm) | 1203,11, 1325, 19 - 1328 Front: 1606 Side: 1106 Turret: 1007 Hull: 1057 |
||
| Hull Front, Upper | 4.3"@0°10, 90-1204, 1209 | 120-1602 | 1201 |
| Hull Front, Lower | 90-95 | ||
| Hull Sides, Upper | 3.5"@0°10, 90-954, 909 | 902 | 951 |
| Hull Sides, Lower | 90 | ||
| Hull Rear | 2"@0°10, 604,9 | 60-902 | 601 |
| Hull Top | 20-304, 309 | 20-302 | 301 |
| Hull Bottom | 20-304,9 | 20-302 | 301 |
| Turret Front | 3.9"@0°10, 1604, 30 - 1009 | 1002 | 1601 |
| Turret Sides | 3.7"@0°10, 160-1004 | 902 | 1101 |
| Turret Rear | 904 | 60-902 | 1001 |
| Turret Top | 304 | 302 | 301 |
| Engine (Make / Model) | V-2-IS3,4,5,8,11 1943: V-2-IS2 V-2K10 |
||
| Bore / stroke | |||
| Cooling | Water8,10 | ||
| Cylinders | V-125,8,10, 1211 | ||
| Capacity | |||
| Net HP | 51311, 6005,6,10 520@2,000 rpm8 |
||
| Power to weight ratio | 11.3 hp/ton9, 13 hp/ton8 | ||
| Compression ratio | |||
| Transmission (Type) | 8 forward, 2 reverse 2x4 forward, 2 reverse4 5 forward, 1 reverse10 Sliding mesh10 |
||
| Steering | Clutch brake10 | ||
| Steering ratio | |||
| Starter | |||
| Electrical system | |||
| Ignition | |||
| Fuel (Type) | Diesel5,8,10,11 | ||
| Octane | |||
| Quantity | 217 gallons, 158 gallons + 104 gallons in auxiliary tanks10 820 liters4 |
800 liters2 | |
| Road consumption | |||
| Cross country consumption | |||
| Performance | |||
| Traverse | 360°10 Electric or hand10 |
360° | |
| Max speed | 23 mph3,5,8,11, 25 mph10, 27 mph7 37 kph3,4,5,6,8,9,11 |
37 kph2 | 37 kph1, 23 mph1 |
| Cross country speed | 15 mph | ||
| Road radius | 94 miles8, 120 miles7, 149 miles3,5,11, 160 miles10 150 km8, 240 km3,4,5,11, 130 - 240 km9 |
150 km2 | 155 miles1, 149 miles1 250 km1, 240 km1 |
| Cross country radious | 110 - 125 km9, 210 km4 |
130 miles1 210 km1 |
|
| Turning radius | |||
| Elevation limits | -4° to +20°10 | ||
| Fording depth | 4' 3"10 1.3 m4,9 |
1.3 m2 | |
| Trench crossing | 8.1'8, 8' 2"5,10 2.49 m5, 2.5 m9, 2.9 m8 |
2.5 m2 | |
| Vertical obstacle | 3' 3"5,10 1 m5,9 |
1 m2 | |
| Climbing ability | 24° slope10 | ||
| Suspension (Type) | Torsion Bar4 Torsion arm10 |
||
| Wheels each side | 64,10 | ||
| Return rollers each side | 310 | ||
| Tracks (Type) | Cast allow steel, dry pin10 | ||
| Length | |||
| Width | 21", 25.5"10 650 mm4 |
||
| Diameter | |||
| Number of links | 87-9010 | ||
| Pitch | 6.25"10 | ||
| Tire tread | Steel4 | ||
| Track centers/tread | 97.25"10 | ||
| Production | 1944- : 3,800 1943: 1021,2, 359 1944: 2,2109, 2,2521,2 1945: 1,5001,2, to May 9: 9979, after May 9: 1,1509 2,3507 1944: Soviet arsenals10 |
Sources:
- Russian Tanks of World War II Stalin's Armored Might, by Tim Bean & Will Fowler, 2002
- Russian Tanks and Armored Vehicles 1917-1945, by Wolfgang Fleischer, 1999
- The Encyclopedia of Tanks and Armored Fighting Vehicles - The Comprehensive Guide to Over 900 Armored Fighting Vehicles From 1915 to the Present Day, General Editor: Christopher F. Foss, 2002
- Panzer Truppen The Complete Guide to the Creation and Combat Employment of Germany's Tank Force 1943-1945, Thomas L. Jentz, 1996
- The Encyclopedia of Weapons of World War II, Chris Bishop, 1998
- Jane's World War II Tanks and Fighting Vehicles The Complete Guide, Leland Ness, 2002
- Tanks of World War II, Duncan Crow, 1979
- Battle Winning Tanks, Aircraft & Warships of World War II, David Miller, 2000
- Russian Armour Volume 1: The IS Tanks IS-1, IS-2, IS-3, Mikhail Baryatinskiy, 2006
- Tank Data 2, Aberdeen Proving Grounds Series, E. J. Hoffschmidt and W. H. Tantum IV, 1969
- The Illustrated Guide to Tanks of the World, George Forty, 2006
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