The DC-6 is a four-engine propeller-driven airliner developed by Douglas Aircraft Company in the late 1940s. It was designed for commercial passenger and cargo transport, featuring a spacious cabin and advanced aerodynamics for its time. The aircraft could accommodate around 50 to 60 passengers and was known for its reliability and performance. First flown in 1946, the DC-6 became popular among airlines and was used extensively during the post-World War II era. It played a significant role in the expansion of air travel, paving the way for future aircraft designs, including the DC-7 and Boeing 707.