Liberty 12-A Engine
Date of Manufacture: 1918
Country: United States
Type: V-12 Water-cooled Inline
Weight: 820 pounds
Number Produced: 20478
Aircraft Example: D.H.4
America's greatest technological contribution during
WWI was the Liberty 12-cylinder water-cooled engine. Rated at 410 hp., it
weighed only two pounds per horsepower, far surpassing similar types of
engines mass-produced by England, France, Italy, and Germany at that time.
During the war, 20,478 Liberty 12s were produced by
Packard, Lincoln, Ford, General Motors , Nordyke, and Marmon. They were
used primarily in U.S.-built D.H.4s, the only American-made airplane to
get into combat over the Western Front.