The Wright R-1820 is a radial aircraft engine that was first developed in the 1930s. It features nine cylinders arranged in a circular pattern and is known for its reliability and power. The engine has a displacement of 1,820 cubic inches and typically produces between 700 to 1,200 horsepower, making it suitable for various aircraft. This engine was widely used during World War II and powered many famous aircraft, including the Douglas DC-3 and the Grumman F4F Wildcat. Its robust design and performance contributed to its popularity, and it remains a significant part of aviation history.