The Douglas A-1 Skyraider were designed as the new generation torpedo/bomber. Following the plan that was changed for the end of the war, the Navy applied the Skyraider as a new attacker for the outstanding performance in the strike missions. The AD-4 is the largest production model of the family of the Skyradiers. A new 2700 horsepower R-3350-26WA engine was installed, and the windshield was strengthened to protect the pilot from the bullets. A series of new equipment such as two extra guns, a P-1 autopilot, new arresting hook were also applied.
The AD-4 was renamed as A-1D with the new nomenclature of the US Navy in 1962.
The AD-4 was renamed as A-1D with the new nomenclature of the US Navy in 1962.