| 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 |
|
|
