First of the Skyraider series, the single-place AD-1 (later designated the A-1) was delivered in 1946. The AD-1 was powered by a single Wright 3350 piston engine. Before production ceased in 1957, 3,180 Skyraiders were delivered in 28 variations. Basically a low-wing, attack bomber, the AD was used for anti-submarine surveillance missions, as a cargo carrier and an ambulance plane. As a personnel carrier, the AD-5 version airlifted 10 passengers plus crew.