Packard 1A 2500

The Packard 1A-2500 is an American V-12 liquid-cooled aircraft engine designed by Packard in 1924 as a successor to the World War I-era Liberty L-12. Five aero variants were produced, of which the 3A-2500 was the most numerous. Three marine versions, used most prominently in American World War II PT-boats, the 3M-2500, 4M-2500, and 5M-2500, were also derived from it.

Contents

• Applications
• Variants
• Engines on display
• Specifications 1A 2500
• General characteristics
• Components
• Performance
• References

As a result of Packard's World War II collaboration with British Rolls-Royce to produce the Packard-Merlin version of the V-12 Rolls-Royce Merlin, engines in the 1A-1500 - 5M-2500 series are often confused with both.