Douglas DC-4

DC-4
Role	Airliner/transport aircraft Type of aircraft
National origin	United States
Manufacturer	Douglas Aircraft Company
First flight	14 February 1942 (production series)[1]
Introduction	1942 with United Airlines
Retired	1991
Status	In very limited use
Primary users	South African Airways Museum Society United Airlines (historical) American Airlines (historical) Trans World Airlines (historical) Buffalo Airways (historical)
Produced	1942 – August 1947
Number built	80[2] DC-4 and 1,163 C-54/R5D
Variants	C-54 Skymaster Canadair North Star Aviation Traders ATL-98 Carvair
Developed into	Douglas DC-6

The Douglas DC-4 is an American four-engined (piston), propeller-driven airliner developed by the Douglas Aircraft Company. Military versions of the plane, the C-54 and R5D, served during World War II, in the Berlin Airlift and into the 1960s. From 1945, many civil airlines operated the DC-4 worldwide.