| GENERAL DATA | |||
|---|---|---|---|
| Other Designations | IS-1 [IS - Iosef Stalin, also IS-85, and JS-1] | ||
| Manufacturer(s) | Factory No.100 Kirovskiy Works in Chelyabinsk (ChKZ or Tankograd) | ||
| Production Quantity | 1071 | Production Period | Late 1943 - Early 1944 |
| Type | Heavy Tank | Crew | 4 |
| Overall Length | 8.3 m (27' 3") | Barrel Overhang | 1.6 m (5' 3") |
| Width | 3.1 m (10' 2") | Height | 2.7 m (8' 10") |
| Combat Weight | 44000 kg (97000 lbs) | Radio Equipment | 10R or 10RK |
| FIREPOWER | |||
|---|---|---|---|
| Primary Armament | 85mm Gun D-5T85 | Ammunition Carried | 59 |
| Traverse (degrees) | 360° | Elevation (degrees) | -4° to +23° |
| Traverse speed (360°) | n.a. | Sight | 10T-15, PT-4-15 |
| Secondary Armament | 3 x 7.62mm DT MG (coaxial, turret rear, bow) |
Ammunition Carried | 2520 |
| MOBILITY CHARACTERISTICS | |||
|---|---|---|---|
| Engine Make & Model | V-2-IS (V-2K) | Track Links | 87-90/track |
| Type & Displacement | V12, 38.9 liters | Track Width | 65 cm (26") |
| Horsepower (max.) | 600hp @2000rpm | Track Ground Contact | 436 cm (172") |
| Power/Weight Ratio | 13.6 hp/tonne | Ground Pressure | 0.78 kg/cm2 (11.1 psi) |
| Gearbox | 4 forward, 1 reverse | Ground Clearance | 0.46 m (1' 6") |
| Fuel | Diesel | Turning Radius | 0 |
| Range on road | 150(260) km | Gradient | 36° |
| Mileage on road | 330 l/100km | Vertical Obstacle | 1.0 m (3' 3") |
| Fuel Capacity | 520 (+ 360 external)2 l | Fording | 1.3 m (4' 3") |
| Speed on/off road | 37/19 km/h | Trench Crossing | 2.5 m (8' 2") |
| ARMOR PROTECTION | ||||
|---|---|---|---|---|
| Armor Detail | Front | Side | Rear | Top/Bottom |
| Hull | 100mm @60° | 90mm @90° | 60mm @49° | 30mm @0°(front) |
| 60mm @18°(glacis) | 20mm @0°(back) | |||
| Superstructure | 120mm @60°(driver) | 90mm @75° | 60mm @41° | 30mm @0° |
| Turret | 100mm @round | 100mm @72° | 100mm @60° | 30mm @0-5° |
| Mantlet | 100mm @round | - | - | - |
| NOTES |
|---|
|
1At least 102 of these vehicles were later rearmed with the 122mm D-25 gun. It is unclear whether any of the vehicles with the original configuration were actually used in combat. 2It is assumed here that the four 90 liter tanks were all used for fuel. |
| REFERENCES |
|---|
| RT, RTAV, OOBTr, TW, IS2, PH28r, IS2, Russian Military Zone |
Copyright © 2018 Ralph Zuljan