| 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 aircraft 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 saw wide use in aero applications, and saw marine use both in racing and runabout boats once it was marinized.
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.