In the winter of 1941–1942 the tank development department (WaPrüf 6) issued technical requirements for a new 30-ton tank. The orders for development were placed with MAN and Daimler-Benz. The prototypes were to be ready by May 1942. However, on May 13, 1942, only comparative characteristics of the projects were submitted. The MAN project was preferred, and the Daimler-Benz project was canceled.
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%.