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The Thunderbolt II's airframe was designed around the high power 30 mm GAU-8 Avenger rotary autocannon. The A-10 was intended to improve on the performance and firepower of the Douglas A-1 Skyraider.
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Its secondary mission is to direct other aircraft in attacks on ground targets, a role called forward air controller-airborne aircraft used primarily in this role are designated OA-10. The A-10 was designed to provide close air support (CAS) to friendly ground troops by attacking armored vehicles, tanks, and other enemy ground forces it is the only production-built aircraft designed solely for CAS to have served with the U.S.
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In service since 1976, it is named for the Republic P-47 Thunderbolt, but is commonly referred to as the " Warthog" or simply " Hog". The Fairchild Republic A-10 Thunderbolt II is a single-seat, twin- turbofan, straight-wing, subsonic attack aircraft developed by Fairchild Republic for the United States Air Force (USAF).
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