Object 257

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3 560 000
Obj. 257
A project of the heavy tank designated IS-7 that was developed in 1945. The vehicle was supposed to feature an electromechanical transmission. Development was discontinued at the documentation design stage. Existed only in blueprints.

122 mm BL-9

122 mm BL-13-1 A

Object 257
IS-7
191 500Credits

IS-3 (257)

10RK

12RT

R-113

V-2-54IS

2x V-16 (1000)

Object 257

Object 257 Version 2

Shell Types:

AP
APCR
HE
APCR
HEAT
HE

Equipment:

Consumables:

Tech Tree:

IS-3
77 000
Obj. 257
142 700
IS-7
191 500

Firepower:

Ammunition40 (rounds)
Caliber122 (mm)
Damage390 / 390 / 530 (HP)
Penetration225 / 265 / 68 (mm)
Rate of Fire4.51 (rounds/min)
Average Damage per Minute1759 (HP)
Shells in the Magazine  
Time for Loading Between Shots  (s)
Time for Complete Loading  (s)
Gun Loading13.30 (s)
Aiming Time3.00 (s)
Dispersion at 100 m0.40 (m)

Mobility:

Weight/Load Limit51.32 / 55.00 (t)
Engine Power700 (h.p.)
Specific Power13.64 (h.p./t)
Top Speed50 (km/h)
Reverse Speed15 (km/h)
Traverse Speed35 (deg/s)
Turret Traverse Speed26 (deg/s)

Survivability:

Hit Points1800 (HP)
Hull Armor130 / 130 / 70 (mm)
Turret Armor249 / 110 / 70 (mm)

Spotting:

View Range380 (m)
Signal Range440 (m)
 

Crew:

Commander(Radio Operator)
Driver
Gunner
Loader