R4D-1 Skytrain

The Douglas R4D-1 Skytrain, the Navy’s version of the civilian DC‑3, entered service in 1941 and quickly became a World War II workhorse. Built on the proven DC‑3 airframe, it featured a low‑wing monoplane layout, twin Pratt & Whitney R‑1830 Twin Wasp radials delivering 1,200 hp each, a spacious fuselage, and a sturdy fixed‑gear undercarriage. With a top speed of about 230 mph, a range of 1,500 mi and a payload of up to 6,000 lb, the R4D‑1 handled troop transport, cargo, medical evacuation, paratroop drops and anti‑submarine patrols from carriers and forward bases. More than 3,000 were built for the Navy, Marine Corps and Coast Guard, serving in both the Pacific and European theatres. After the war the aircraft was transferred to civilian airlines, polar expeditions and humanitarian relief, proving its exceptional reliability and versatility. The R4D‑1’s simple, rugged design set the standard for military transport and directly influenced the later C‑47 and modern tactical airlifters. Today restored examples are displayed in museums worldwide, reminding aviators of the aircraft’s lasting impact on aviation logistics. Their graceful silhouette and dependable engines continue to inspire engineers designing next‑generation transport aircraft.

Douglas

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Design & Classification