The T-62 was the first production tank to use a smoothbore main gun
In short: Introduced in 1961, the Soviet T-62 revolutionized tank warfare by abandoning traditional rifled barrels for a smoothbore design. This innovation allowed for higher velocity projectiles, giving the tank a distinct advantage on the battlefield. Yet, this leap in firepower came with unique mechanical quirks and significant operational trade-offs.
By the late 1950s, Soviet military planners realized the 100 mm guns on their T-55 tanks struggled to penetrate the frontal armor of modern Western vehicles like the Centurion and M48 Patton. To counter this, engineers at the Uralvagonzavod factory, led by Leonid N. Kartsev, developed a new 115 mm smoothbore gun, the U-5TS Rapira. This weapon fired kinetic energy penetrator rounds at muzzle velocities nearly 200 meters per second higher than previous guns, effectively doubling the maximum engagement range.
Integrating this powerful weapon required a complete redesign. The T-55 hull was too small to accommodate the larger turret and ring necessary to absorb the gun's recoil. The resulting T-62, which entered mass production in July 1961, featured a distinct egg-shaped turret and a stretched chassis. A notable design feature was the automatic ejection port in the rear of the turret, which expelled spent shell casings to prevent the accumulation of noxious fumes in the cramped fighting compartment. However, this port posed a risk in nuclear, biological, or chemical environments, as it could potentially expose the crew to contamination.
Despite its advancements, the T-62 faced limitations. Its rate of fire, capped at about 8 rounds per minute, lagged behind Western tanks equipped with 105 mm guns. Furthermore, the tank inherited the cramped interior and vulnerable ammunition storage of its predecessor. While the T-62 became a standard in the Soviet arsenal, its higher manufacturing and maintenance costs meant it never fully replaced the T-55 in export markets. Today, while successor models have emerged, the T-62 remains in reserve or frontline use across several nations, serving as a testament to the evolution of Soviet armored design.
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- Summary by Intellect · source: T-62
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