Cylinder and Piston, Liberty 12 Model A V-12 Engine

Display Status:

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.