The design of the KV-5 was almost complete by August 1941 and production of the prototype had begun when the approaching German Army forced the design team to evacuate to the Urals. The proposed tank was huge, and weighed 100 tons.The crew of six had plenty of room, but they were widely separated. Both the driver-mechanic and the radio operator/machine-gunner had separate compartments, the driver with their own vision cupola, and the machine-gunner with a rotating machine-gun cupola. The turret was large for its four man crew, with machine-gun cupola on top manned by one of the two loaders.