Douglas A-4 Skyhawks have a maximum takeoff weight of 24,500 lb.
A4D-2 [A-4B]Strengthened aircraft and added air-to-air refueling capabilities, improved navigation and flight control systems, provision for AGM-12 Bullpup missile; redesignated A-4B in 1962, 542 built
A4D-1 [A-4A]Initial production version; redesignated A-4A in 1962, 166 built

