Douglas DC-8-50

The -50 series first flew on 20th December 1960, made possible by the introduction of the turbofan engine. The JT3D-1 turbofan was a development of the JT3C turbojet, and was a major improvement; quieter and allowing the Series 50 to carry the heaviest payload of the basic DC-8 family at 51,700 lb (23,450 kg), over a range of 6,815 miles (10,965 km) thanks to the turbofan’s fuel economy. Other than a redesigned nacelle and pylon no other changes were required.
Five versions were eventually produced, the DC-8-52, -53, -54, and -55 with increasing MTOWs and JT3D engine ratings.
Douglas announced a Convertible Series 50CF freighter (DC-8-54CF) in April 1961, the ‘Jet Trader’ featuring a large forward door and strengthened floors with cargo handling equipment.
Some earlier Series’ 30, 40, and 50 were converted to this type by Douglas.
United Airlines placed an order for 15 all-freight Series 50s (DC-8-54AF) with almost all fuselage windows deleted and all passenger facilities removed.

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