New England Air Museum
Liberty 12A V-12



The Liberty was designed by Jesse Vincent of Packard and E. J. Hall of Hall-Scott in a Washington hotel suite between May 30 and June 4, 1917. It was the result of a massive U.S. War Department project to quickly provide a large number of aero engines during World War I that would rival, if not surpass, those currently in use by the Allied Powers and enemy nations.

A total of 20,478 were delivered, mostly prior to November, 1918. It was manufactured by Buick, Ford, Marmon, Packard. Hall-Scott was considered too small to receive a production order. The Museum's engine was built by Ford.

Manufacturing was facilitated by the unique modular design which also allowed variants to be produced in four or six cylinders in one or two banks.

Applications included tanks , as well as, aircraft Thousands continued in civil and military, with the U.S. Army and British RAF, use until the mid-1930's. Tank versions of the engine were produced until the late 1930's.

Aircraft to use Liberty engines included:

  • Airco DH.4, DH.9, DH.10
  • Caproni Ca.60
  • Curtiss NC, Carrier Pigeon
  • Douglass C-1, DT, O-1
  • Handley Page H.P.20

Tanks to use adaptations of the Liberty engines included:

  • Tank Mark VIII (aka "Ango-American" or Liberty World War I tank)
  • Russian BT-2
  • Cruiser Mk III, Mk IV
  • Crusader
  • Centaur Mk I-IV

The engine is displayed in the connector between the Military and Civilian Hangars.

If you have any information, or comments on the Liberty engine, please contact This e-mail address is being protected from spambots. You need JavaScript enabled to view it. .


Type: 12-cylinder, liquid-cooled, "V" piston engine
Displacement: 1,649 cu. in.
Weight: 790 lbs.
Power Output: 400 hp at 1,800 rpm
NEAM Id: 141


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