The Douglas DC-4 was an unpressurized four-engine transport whose production series first flew on February 14, 1942. Mass-produced during the Second World War as the military C-54 Skymaster, it became one of the workhorses of postwar…
The Douglas DC-6 is the piston-engined four-motor airliner with which the Douglas Aircraft Company took on Lockheed in the post-war long-range commercial market. It began as a military order: in 1944 the United States Army Air Forces asked…
The Boeing 377 Stratocruiser, the civil derivative of the C-97 and ultimately of the B-29 bomber, first flew on 8 July 1947 and entered service with Pan American on 1 April 1949. With its double-deck fuselage and lower-deck lounge it…