The A-10 Thunderbolt II better known as the “Warthog” is a single-pilot attack aircraft designed for short takeoffs and landings from primitive airfields. The A-10 can operate nearly anywhere and provide ground troops with close air support. The entire aircraft was largely designed around its nose gun, a 30 mm Avenger cannon. The seven-barrel rotary cannon measures nine feet long and fires 30mm armor-piercing shells at a rate of nearly 4,000 rounds per minute. As a result it has been given the nickname “Tank killer”. The Avenger cannon also represents over 15 percent of the aircraft’s weight. When the gun is removed for maintenance, the A-10’s tail must be supported to keep the nose from tipping up.