LTV A-7D Corsair USAFA 7D Corsair airplane model. The Ling Temco Vought A 7 Corsair II was a carrier based subsonic light attack aircraft design that was introduced to replace the A 4 Skyhawk in US Naval service and based on the successful supersonic F 8 Crusader aircraft produced by Chance Vought. The A 7 was one of the first combat aircraft to feature a head up display (HUD), doppler bounded inertial navigation system (INS), and a turbofan engine. It initially entered