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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.
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Douglas DC-4 | Developed into | Aviation Traders ATL-98 Carvair Douglas DC-6 | 1.00 | infobox |
| Douglas DC-4 | First flight | 14 February 1942 (production series) | 1.00 | infobox |
| Douglas DC-4 | Introduction date | 1942 with United Airlines | 1.00 | infobox |
| Douglas DC-4 | Manufactured | 1942 – August 1947 | 1.00 | infobox |
| Douglas DC-4 | Manufacturer | Douglas Aircraft Company | 1.00 | infobox |
| Douglas DC-4 | National origin | United States | 1.00 | infobox |
| Douglas DC-4 | Number built | 80 DC-4 and 1,163 C-54/R5D | 1.00 | infobox |
| Douglas DC-4 | Primary users | South African Airways Museum Society United Airlines (historical) American Airlines (historical) Trans World Airlines (historical) Buffalo Airways (historical) | 1.00 | infobox |
| Douglas DC-4 | Retired | 1991 | 1.00 | infobox |
| Douglas DC-4 | Status | In very limited use | 1.00 | infobox |
| Douglas DC-4 | Type | Airliner/transport aircraft | 1.00 | infobox |
| Douglas DC-4 | Variants | C-54 Skymaster Canadair North Star | 1.00 | infobox |
| Douglas DC-4 | is a | American four-engined | 0.90 | text |
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