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Liberty L-12
- See also Liberty L-8 for the eight-cylinder prototype & Lincoln Liberty engine
The Liberty L-12 was a 27 litre water-cooled 45 degree V-12 aircraft engine of 400 horsepower (300 kW).
It was designed by Jesse Vincent and E. J. Hall of the Hall-Scott Motor Co. and manufactured by Packard, Lincoln, Ford, Nordyke and Marmon, and General Motors during the First World War. It was a modular design where 4 or 6 cylinders could be used in one or two banks. 20,478 were built between 4 July 1917 and 1919. A single overhead camshaft for each cylinder bank operated 2 valves per cylinder, in a similar manner to the German Mercedes D.III inline six cylinder engine. Dry weight was 383 kg (844 lb). Two examples of a six-cylinder version, the Liberty L-6, were produced but not procured by the Army. Both were destroyed by Dr. William Christmas testing his so-called "Christmas Bullet" fighter.
An inverted Liberty 12-A was also referred to as the V-1650 and was built up to 1926—the exact same designation later applied, due to identical displacement, to the World War II Packard-built Rolls-Royce Merlin.
The engine was also produced in the United Kingdom] for tank use as the Nuffield Liberty and used extensively for that purpose
Specifications (Liberty L-12)
Used In
- Airco DH.4
- Airco DH.9
- Caproni Ca.60
- Curtiss NC
- Airco DH.10
- Douglas C-1
- Douglas DT
- Douglas O-2
- Witteman-Lewis XNBL
Tanks
- Mark VIII - Anglo-American or Liberty (WWI)
- BT-2 - Soviet (interwar)
- Cruiser Mk III - British (WWII)
- Cruiser Mk IV - British (WWII)
- Crusader - British (WWII)
- Centaur - early version of the British Cromwell (WWII)
cs:Liberty 12 de:Liberty (Motor) it:Liberty L-12 tr:Liberty L-12
| This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Liberty L-12". |
