The Liberty was a U.S. Army project to
provide large numbers of aircraft engines in the minimum amount of time.
The engine was designed by Packard and Hall-Scott incorporating design
concepts from both engine manufacturers.
Design on the Liberty
12 began on 30 May 1917 and testing on 3 July of the same year! By
November 1918 over 20,000 had been built. A reliable engine, thousands
remained in use into the mid 1930s.