No engine in the history of aviation can compare with the Liberty in terms of the speed of design development and introduction into production, as well as the size of the production run. The Liberty was also a record holder in terms of design longevity. Due to its simplicity and the technologies used, it could be produced in practically any automobile factory.
The engine was developed shortly after the United States entered World War I. From July 1917 to November 1918, over 20,500 engines were produced. However, only a small number of aircraft with the Liberty engine reached the front before the armistice was signed. The stockpiles of these engines were used until the late 1930s.
The Liberty 12 was used, among others, in the Curtiss NC and Douglas DWC aircraft, as well as the De Havilland DH.4, and also in tanks from the World War I and World War II era.
| Configuration | 12-cylinder, V |
| Cooling | water |
| Displacement | 27.0 l |
| Power | 480 hp |
