Douglas DC-7
US airliner with 4 piston engines, 1953
Douglas DC-7
The Douglas DC-7 is a retired American airliner built by the Douglas Aircraft Company from 1953 to 1958. A derivative of the DC-6, it was the last major piston engine-powered passenger aircraft made by Douglas, being developed shortly after the earliest jet airliner, the de Havilland Comet, entered service and only a few years before the jet-powered Douglas DC-8 first flew in 1958. A large number of both DC-7B and DC-7C variants were also built, with a handful of aircraft converted for the purpose of cargo hauling or fire-fighting after their commercial transport days had passed. Unlike other propeller-driven Douglas aircraft that were far more successful, such as the DC-3 and DC-6, no examples of the DC-7 remain in service as of 2020.
Read on Wikipedia · Image K.W. Gullers, CC BY-SA 4.0
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