The de Havilland Gipsy Major is a four-cylinder, air-cooled aircraft engine designed in the 1930s. It was widely used in light aircraft, particularly in the popular de Havilland Tiger Moth and de Havilland Chipmunk. Known for its reliability and simplicity, the Gipsy Major became a standard engine for many training and recreational planes. This engine has a displacement of 1,600 cc and produces around 145 horsepower. Its design features a direct-drive configuration, which means it drives the propeller directly without a reduction gearbox. The Gipsy Major played a significant role in aviation history, contributing to the training of countless pilots.