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Self-propelled artillery began to emerge in the years of the First World War. But the really widespread ACS have already received during the Second World War. Particularly successful in the design and application of self-propelled guns on the field of battle in the 1940s reached the Soviet Union. Get at least a little-known ISU-122, which is feared by all the German tank crews.
Self-propelled artillery installation MIS-122 does not become a legend of the Red Army. It was not included in the film and propaganda posters. The gun was accepted into service March 12, 1944 and served in the army is not very long. Despite all of the above, his mark during the Second World War, the ISU-122 left (and even some!). For a very short period of operation of ACS could be a bad dream of the Wehrmacht tank.
Developed by ISU-122 was in December 1943, KB OZ number 100. Subsequently, a series of small arms are produced at the Chelyabinsk Kirov Plant until 1945. He served as a gun, and after the war, until the early 1960s. Even managed to pass one upgrade. However, back in 1944-1945 gun made no small contribution to the defeat of the Nazis, became extremely powerful fighter tanks.
As for tools used ISU-122 A-19C cannon caliber 121.92 mm. Originally going to put it on the HF tank chassis, which has been withdrawn from the market just before the development of ACS. But later we decided to use the more advanced and reliable platform from Isa. The self-propelled movement cited four-stroke V-shaped 12-cylinder diesel engine of V-2 with IP-recoil 520 horsepower. Chassis consisted of 6 rollers.
There were such SAU only in the Guards Division and used by the Red Army as all similar machines before. The main task of the ISU-122 was killing enemy tanks. It turned out in the self-propelled guns with frightening efficiency for the Wehrmacht. Less than a year it has become an instrument of a terrible dream tankers Reich. In most cases, for the destruction of the tank missing a single shot. It is important that the ISU-122 could stop even the vaunted "Tiger" without any problems.
I would like to know more interesting facts about World War II? Then find out for yourself, why German "Panther" and "Tiger" was staggered arrangement of rollers and how it can help in the battle.
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A source: https://novate.ru/blogs/180319/49823/