This object is on display in the Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.
Collection Item Summary:
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.
Collection Item Long Description:
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- 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.