The Liberty L-6 is a six-cylinder aircraft engine developed in the early 1920s by the Liberty Engine Company. It was designed to provide reliable power for military and civilian aircraft during and after World War I. The engine features a displacement of 400 cubic inches and produces around 200 horsepower, making it suitable for various aircraft designs of the time. This engine played a significant role in the advancement of aviation technology, influencing the development of future engines. Its design was notable for its use of aluminum components, which helped reduce weight and improve performance. The Liberty L-6 contributed to the evolution of aviation during a pivotal period in history.