18×1021
18x1021 refers to a specific type of ammunition, commonly associated with the Soviet/Russian 30mm autocannon, the GRSh-30-1. The "18" denotes the approximate weight of the projectile in kilograms, while "1021" refers to the length of the cartridge case in millimeters. This designation signifies a large caliber, high-explosive incendiary (HEI) round, designed for anti-air and ground attack roles. The GRSh-30-1 cannon, which fires these rounds, is typically found on modern Russian fighter aircraft such as the Su-27 and MiG-29 variants. The high muzzle velocity and substantial explosive payload of the 18x1021 ammunition make it effective against lightly armored vehicles, aircraft, and hardened targets. The exact specifications and performance characteristics can vary slightly depending on the specific variant of the round and the weapon system it is employed in. These rounds represent a significant offensive capability for the aircraft equipped with the GRSh-30-1 cannon.
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