The Pratt & Whitney R-1830 is a twin-row, air-cooled radial engine that was widely used in military and civilian aircraft from the 1930s to the 1950s. It has a displacement of 1,830 cubic inches and typically produces between 1,200 and 1,400 horsepower. This engine is known for its reliability and performance, making it a popular choice for various aircraft, including the Douglas DC-3 and the Boeing B-17 Flying Fortress. Developed by Pratt & Whitney, the R-1830 features a unique design with 18 cylinders arranged in two rows. Its robust construction allowed it to operate effectively in diverse conditions, contributing to its long service life. The engine's versatility and power made it a key component in the development of many iconic aircraft during its era.