Liberty L-12
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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, General Motors, Nordyke and Marmon during the 1st 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 July 4 1917 and 1919. Displacing 1,650 cubic inches, bore was 5 inches (127 mm) and stroke 7 inches (178mm). A single overhead camshaft for each cylinder bank operated 2 valves per cylinder. Dry weight was 383kg and takeoff power at 2,000 rpm was 449 hp.
An inverted Liberty 12-A was also referred to as the V-1650 and was built up to 1926.
The engine was also produced in the UK for tank use as the Nuffield Liberty.
Specifications (Liberty L-12)
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