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Tanks of World War II

ISU-122 (Early)

GENERAL DATA
Other Desig­nations ISU-122
Manufac­turer(s) Factory No.100 Kirovskiy Works in Chelyabinsk (ChKZ or Tankograd)
Production Quantity about 6451 Production Period Late 1943 - 1944
Type Assault Gun Crew 5
Overall Length 9.8 m (32' 2") Barrel Overhang 3.0 m (9' 10")
Width 3.1 m (10' 2") Height 2.5 m (8' 2")
Combat Weight 46000 kg (101000 lbs) Radio Equipment 10RF
FIREPOWER
Primary Armament 122mm Gun A-19S Ammu­nition Carried 20-30
Traverse (degrees) Manual (11°) Elevation (degrees) -4° to +19°
Traverse speed (360°) - Sight ST-18
Secondary Armament 12.7mm DShK MG (AA) Ammu­nition Carried 500
MOBILITY CHARACTERISTICS
Engine Make & Model V-2-IS 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 13.0 hp/t Ground Pressure 0.81 kg/cm2 (11.5 psi)
Gearbox 4 forward, 1 reverse Ground Clearance 0.46 m (1' 6")
Fuel Diesel Turning Radius 0
Range on/off road 150(230) km Gradient 36°
Mileage on/off road 350 l/100km Vertical Obstacle 1.0 m (3' 3")
Fuel Capacity 520 (+270 external)2 L Fording 1.3 m (4' 3")
Speed on/off road 37/16 km/h Trench Crossing 2.5 m (8' 2")
ARMOR PROTECTION
Armor Detail Front Side Rear Top­/Bottom
Hull 90mm @60° 90mm @90° 60mm @49° 20mm @0°
Super­structure 60mm @12°(glacis) 75mm @75° 60mm @41° 30mm @0°
90mm @60° 60mm @90°
Mantlet 60-65mm @round - - -
NOTES
1Total ISU-122, ISU-122S and ISU-152 production is claimed to be 4075 by June 1945 by Zaloga. The estimate provided here assume 50% of 1943 production and 25% of 1944 production.
2It is assumed here that three 90 liter tanks are used for fuel.
REFERENCES
BP22, ST, RTAV, RT, IS2, Russian Military Zone

Copyright © 2018 Ralph Zuljan