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Liberty L-4

DAYTON, Ohio -- Liberty L-4 on display in the Research & Development Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Liberty L-4 on display in the Research & Development Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)

Note: This item is currently in storage.

The four-cylinder Liberty was an experimental water-cooled engine of 102 hp, built during World War I by the Hudson Motor Co. and intended primarily for use in training airplanes. Only two were produced since other types of engines for trainers were perfected and placed in production, eliminating any requirement for the L-4. As far as is known, the L-4 was never test-flown in an airplane.

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