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How did automatic loaders change the crew arrangement in Soviet T-64 and T-72 tanks?

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The traditional postwar tank configuration typically required a crew of four: a driver, a commander, a gunner, and a human loader. The introduction of automatic loading mechanisms in Soviet T-64 and T-72 tanks fundamentally altered this arrangement by eliminating the need for a dedicated human loader.

By utilizing a carousel-type magazine located below the turret to automatically load the main armament, these tanks were able to operate with a reduced crew size. This shift away from the standard three-person turret crew allowed for more compact vehicle designs while maintaining the necessary firepower.1