Definition The Douglas DC-6 is a piston-powered, propeller-driven airliner and freighter aircraft built by the Douglas Aircraft Company in the United States during the mid-20th century.
Overview Introduced in 1946, the Douglas DC-6 was developed primarily as a civilian airliner to meet the needs of long-range air travel following World War II. It was also utilized in military variants, designated as the C-118 Liftmaster by the U.S. Air Force and the R6D by the U.S. Navy. The aircraft played a significant role in the expansion of commercial air routes, serving with major airlines globally. It was widely used for both passenger and cargo operations through the 1950s and 1960s and remained in service in certain niches—such as cargo, firefighting, and military support—well into the 21st century.
Etymology/Origin The name "DC-6" follows the Douglas Commercial (DC) naming convention, which began with the DC-1 in 1933. The "6" denotes it as the sixth major aircraft in the DC series. The project originated from a requirement by American Airlines for a pressurized aircraft capable of transcontinental flights without refueling stops. Douglas responded with a redesign of the DC-4, resulting in the DC-6.
Characteristics The DC-6 is a four-engine aircraft powered by Pratt & Whitney R-2800 radial engines. It features a low-wing monoplane design with a retractable tricycle landing gear. The aircraft has a pressurized cabin, allowing it to fly above adverse weather at altitudes up to approximately 25,000 feet. Standard passenger configurations ranged from 48 to over 100 seats, depending on the model and variant. Three main production versions were developed: the original DC-6, the extended-range DC-6B, the all-cargo DC-6C, and the military C-118/R6D variants. The aircraft typically had a cruise speed of around 300 mph (480 km/h) and a range of up to 4,400 miles (7,100 km) in later models.
Related Topics
- Douglas DC-7
- Pratt & Whitney R-2800 Double Wasp
- C-118 Liftmaster
- Civil aviation history
- Piston-engine aircraft
- Mid-20th century commercial aviation