Cylinder and Piston, Liberty 12 Model A V-12 Engine
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Liberty 12 Model A
The Liberty was co-designed in a week in mid-1917 by Jesse Vincent of Packard Motor Car and Elbert Hall of Hall-Scott Motor Car. They set out to design an engine with maximum power and minimum weight that would lend itself to mass production, and planned a series that would include 4-, 6-, 8-, and 12-cylinder models. To ensure a workable engine in the shortest possible time, they used only proven components. They succeeded: the first 8-cylinder engine was delivered in early July.
Demand for lower-power engines was already being met, and wartime experience showed the need for high power, so only the 12-cylinder model was produced in quantity-20,478 of them. They were manufactured by Packard, Lincoln, Ford, General Motors, and Nordyke and Morman. Liberty-12s powered many aircraft types, but most were built for the de Havilland DH-4.
Date
Circa World War I
Country of Origin
United States of America
Type
PROPULSION-Components (Engine Parts)
Designer
Liberty Physical Description
Type:
Reciprocating engine, 12 cylinders, V-type, liquid cooled
Power rating: 449 hp at 1,940 rpm
Displacement: 27 l (1,649 cu in)
Weight (dry): 383 kg (844 lb)
Liberty engine cylinder and piston; liquid-cooled; dark green; has valves, springs, piston with rings and wrist pin.
Dimensions
Diameter 13 cm (5 in.), Length 51 cm (20 in.) Inventory Number
A19603016000
Credit Line
Transferred from the U.S. Air Force
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
For more information, visit the Smithsonians Terms of Use.