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| Liberty L-12 | |
|---|---|
| |
| Liberty L-12 aircraft engine | |
| Type | Piston aero engine |
| National origin | United States of America |
| Manufacturer | Lincoln, Ford, Packard, Marmon, Buick |
| Designer | Jesse G. Vincent and Elbert J. Hall |
| First run | c. 1917 |
| Number built | 20,748 |
| Variants | Liberty L-4, Liberty L-6, Liberty L-8 |
The Liberty L-12 is an American water-cooled 45° V-12 engine, displacing 1,649 cubic inches (27 L) and making 400 hp (300 kW), designed for a high power-to-weight ratio and ease of mass production. It was designed principally as an aircraft engine and saw wide use in aero applications. It also saw marine use (both in racing and in runabout boats) once it was marinized; it was used in various military tanks; and it was used in some race cars.
A single bank 6-cylinder version, the Liberty L-6, and V-8, the Liberty L-8, were derived from the Liberty L-12. It was succeeded by the Packard 1A-2500.