The Teeth of the A-10 Thunderbolt:Although the A-10 can carry considerable disposable stores, its pr

The Teeth of the A-10 Thunderbolt:Although the A-10 can carry considerable disposable stores, its primary built-in weapon is the 30 mm GAU-8/A Avenger Gatling-type cannon. One of the most powerful aircraft cannons ever flown, it fires large depleted uranium armor-piercing shells. In the original design, the pilot could switch between two rates of fire: 2,100 or 4,200 rounds per minute; this was changed to a fixed rate of 3,900 rounds per minute. The cannon takes about half a second to come up to speed, so 50 rounds are fired during the first second, 65 or 70 rounds per second thereafter. The gun is accurate enough to place 80% of its shots within a 40-foot diameter circle from 4,000 feet while in flight. The GAU-8 is optimized for a slant range of 4,000 feet with the A-10 in a 30 degree dive -- source link

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