KV-90 [USSR, HT-9]
Historical Reference:
At the beginning of 1942, during the successful counteroffensive near Moscow, design work on super-heavy tanks was resumed in several Soviet design organizations. One of the proposals was a tank project with the provisional designation KV-90, weighing 90–100 tons, which made extensive use of components and assemblies from serial KV tanks and other vehicles.
With frontal armor of 250 mm, the tank was to be armed with a twin mount of 122 mm and 45 mm guns; an alternative variant featured 130 mm and 45 mm guns. As a powerplant, it was planned to use the prospective DD-1 diesel engine with an output of 1,000 hp. According to the plans, such vehicles could have broken through German defenses on the main axes of Red Army offensives; however, the concept of tank employment shifted toward more mobile vehicles of smaller size and mass.