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The Douglas DC-7 is an American transport aircraft built by the Douglas Aircraft Company from 1953 to 1958.
The DC-7 was powered by four Wright R-3350 Duplex Cyclone Turbo-Compound engines. It is a twin-row, supercharged, air-cooled, radial engine with eighteen cylinders, pushrod valves, two-speed single-stage supercharger, Chandler-Evans downdraft carburetor fuel system, and dry-sump oil system.
Built by the Douglas Aircraft Company between 1953 and 1958, the DC-7 was a derivative of the DC-6, made to fly coast-to-coast across the US in as little as eight hours. The DC-7 was the last piston-engine powered plane built by Douglas, and no examples of the aircraft are still flying today.
American Airlines introduced this low-wing airliner on November 29th, 1953. The legacy carrier flew it on a route between New York and Los Angeles. With this move, the company became the first operator to offer nonstop transcontinental service in both directions.
The Douglas DC-7 was an advanced development of the DC-6B piston-engine airliner. It was introduced by American Airlines on its New York–Los Angeles route in November 1953 and was the first airliner to provide nonstop transcontinental service in both directions.
The DC-7 was the last piston-engine airplane ordered by Delta. Deliveries began in February and March 1954. Delta DC-7 service started April 1, 1954, from Chicago to Miami. The inaugural aircraft was DC-7, N4871C, Ship 701, named "Royal Biscayne."
The Douglas DC-7 is an American transport aircraft built by the Douglas Aircraft Company from 1953 to 1958. A derivative of the DC-6, it was the last major piston engine-powered transport made by Douglas, being developed shortly after the earliest jet airliner—the de Havilland Comet—entered service