On August 8, 1943, the SU-152 was sent to the Kremlin to show it to the members of the government.
Stalin himself came to watch the already famous self-propelled gun.
He was apparently aware that self-propelled guns, called the Battle of Kursk "Zveroboi" [Animal Hunter], had performed well in combat.
Approaching the car, he suddenly climbed up on self-propelled chassis, on which there was no supporting ladders.
Looking through the commander's hatch, he asked how things were going with the ventilation of the conning tower.
Apparently, someone had reported him that the crews on the machines of the first production batch suffered heavily under bad ventilation.
Test driver K.E Egorov calmly replied: "Indeed, the exhaust gases get inside the car, but for these self-propelled guns ventilation worked better, so that three times more air passes through itself and the danger of smoke or powder gases is completely eliminated."