The Douglas DC-7 is a retired American transport aircraft built by the Douglas Aircraft Company from 1953 to 1958.

The press release states, “Northwest Orient Airlines is now operating converted DC-7CF aircraft in cargo service across the Pacific, in the Orient and in domestic air freight service. A total of five of Northwest’s DC-7Cs have been modified by installation of a strengthened cargo floor and a forward cargo door 81 by 124 inches in size, the ...

weight and performance calculations for the Douglas DC-7C non-stop trans-atlantic airliner

May 18, 2022 · 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.

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. It produces a maximum thrust of 3,250 horsepower each.

Nov 1, 2013 · This gave the new DC-7C Seven Seas (in a clever pun on "7C") not only more room for fuel, but placed the engines further out on the wing, lessening the noise and vibration of the rather loud Wright R-3350 radials.

The DC-7C featured extra fuel capacity, a 3.05m (10ft) fuselage stretch and more powerful engines, and could cross the North Atlantic nonstop in either direction. It entered service in April 1956, although sales were restricted by the coming availability of jets.

Feb 24, 2025 · The DC-7C Seven Seas was the last piston-engine airliner built by Douglas Aircraft Company, intended for non-stop transcontinental and transatlantic flights. The DC-7 combined the fuselage of a DC-6 with the wings of a DC-4.

May 7, 2021 · 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.

Jan 20, 2022 · DC-7C Seven Seas - long-range version with stretched fuselage, increased wing span, heightened tail fin and further increases to fuel capacity (121 built, first flight 20 Dec 55). Conversions were made to all-cargo configuration under unofficial designations DC …