A variant of the heavy tank developed in the U.S. from May 1940, this vehicle featured a cast hull and hydromechanical suspension with a two-disc hydraulic converter. The vehicle was standardized on May 26, 1942. A total of 9 vehicles were manufactured (8 serial and 1 experimental), but never saw action.
Time for the successive autoreloading of each shell into the magazine.
Characteristics are specified for Siege mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles.
Characteristics are specified for vehicles with crews trained to 100%.