Object 257 tech tree branch
Object 257 characteristics
Firepower
- Damage
- 440hp
- Penetration
- 248mm
- DPM
- 2,031
- Reload
- 13.00s
- Rate of fire
- 4.62/min
- Aim time
- 2.90s
- Accuracy
- 0.400m
- Dispersion moving
- 0.180
- Shell velocity
- 1,259m/s
- Caliber
- 122mm
- Gun depression
- 15°
- Gun elevation
- 5°
Mobility
- Top speed
- 50km/h
- Reverse speed
- 15km/h
- Engine power
- 850hp
- Power/weight
- 15.5hp/t
- Hull traverse
- 40.0°/s
- Turret traverse
- 26.0°/s
- Hard terrain
- 1.30
- Medium terrain
- 1.70
- Soft terrain
- 2.50
Survivability
- Hit points
- 1,600hp
- Hull armor (front)
- 130mm
- Turret armor (front)
- 350mm
- Fire chance
- 0%
- Ammo rack HP
- 210hp
- Track HP
- 240hp
Spotting & other
- View range
- 390m
- Signal range
- 730m
- Camo (still)
- 0.1%
- Camo (moving)
- 0.1%
- Weight
- 55.0t
Object 257 historical reference
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.