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Tanks of World War II

IS-3

GENERAL DATA
Formal Desig­nation IS-3 Model 1945
Manufacturer(s) Factory No.100 Kirovskiy Works in Chelyabinsk (ChKZ or Tankograd)
Production Quantity 350* Production Period 1945*
Type Heavy Tank Crew 4
Overall Length 10.0 m (32' 10") Barrel Overhang 3.3 m (10' 10")
Width 3.20 m (10' 6") Height 2.45 m (8' 0")
Combat Weight 46500 kg (103000 lbs) Radio Equipment 10RK
FIREPOWER
Primary Armament 122mm Gun D-25 Ammu­nition Carried 28
Traverse (degrees) 360° Elevation (degrees) -3° to +20°
Traverse speed (360°) n.a. Sight TSh-17, POP
Secondary Armament 2 x 7.62mm DT MG (coaxial, turret rear) Ammu­nition Carried 1000x7.62mm
1 x 12.7mm DShK MG (AA) 945x12.7mm
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 11.0 hp/tonne Ground Pressure 0.82 kg/cm2 (11.7 psi)
Gearbox 4 forward, 1 reverse Ground Clearance 0.45 m (1' 6")
Fuel Diesel Turning Radius 0
Range on/off road 150(225)/120(175) km Gradient 36°
Mileage on/off road 350/450 l/100km Vertical Obstacle 1.0 m (3' 3")
Fuel Capacity 520 (+ 270 external) 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 120mm @47° 90mm @90° 60mm @49° 20mm @0°
Super­structure 120mm @32°(glacis) 90mm @30° +
30mm @60°
60mm @42° 20mm @0°
120mm @18°
Turret 160mm @round 100-220mm @40° 110-220mm @50° 20mm @0-6°
Mantlet 200mm @round - - -
TECHNICAL DRAWINGS AND OTHER IMAGES
Profile Drawing Available IS-3 Model 1945 by S. Zaloga
NOTES
*A prototype was completed in November 1944. Production began sometime in 1945. The production quantity estimate is believed to be for the first six months of 1945. Production continued in the postwar period. The IS-3 is not believed to have not been ready for employment before hostilities ceased in the European theater of operations.
REFERENCES
JWAFV, RT, IS2, GBT, RTAV, OOBTr, PH30r, Russian Military Zone

Copyright © 2018 Ralph Zuljan