IS-6/Object 252/Object 253

The IS-6 was a Soviet heavy tank built as a breakthrough tank. The first prototype, the Object 253, overheated too much and required too much copper therefor cancelled. The second prototype was lighter weight and had more speed. The tank was not much of an improvement of the IS-4.

Variants:
1.
Name: Object 253
Type: Heavy Tank
Origin: Soviet Union
Year: 1943
Produced: 2

Length: 7.02 Meters
Width: 3.43 Meters
Height: 3.43 Meters
Weight: 54000 Kilograms
Speed: 35 km/h

Crew: 4

Primary Armament:
-122 mm D-30T
Secondary Armament:
-7.62 SGMT AND
-12.7 mm DSK

Armor:
-Hull
120 mm Front
120 mm Side
60 mm Rear
30 mm Top
30 mm Bottom
-Turret
250? mm Front
150 mm Side
100 mm Rear
50 mm Top

2.
Name: Object 252

Type: Heavy Tank
Origin: Soviet Union
Year: 1943
Produced: 2

Length: 7.02 Meters
Width: 3.43 Meters
Height: 2.53 Meters
Weight: 51500 Kilograms
Speed: 43 km/h

Crew: 4

Primary Armament:
-122 mm D-30T
Secondary Armament:
-7.62 SGMT AND
-12.7 mm DSK

Armor:
-Hull
120 mm Front
120 mm Side
60 mm Rear
22 mm Top
20 mm Bottom
-Turret
150 mm Front (150 mm Gun Shield)
150 mm Side
100 mm Rear
50 mm Top

Sources:
http://tanki-tut.ru/ussr-russia/is-6/
http://www.aviarmor.net/tww2/tanks/ussr/is-6.htm