A prototype of this medium tank was developed from 1953 through 1957 to replace the T-54. Soviet authorities wanted a tank with greater nuclear survivability and firepower, so in 1961 the project was discontinued in favor of the Object 432. Several prototypes of the vehicle were manufactured.
Time for the successive autoreloading of each shell into the magazine.
The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.