Packard 3A-2500 Geared Drive, V-12 Engine

Object Details

Physical Description: Type: Reciprocating, 12 cylinders, V-type, geared drive, liquid-cooled; Power rating: 596.6 kW (800 hp) at 2,000 rpm; Displacement: 41.6 L (2,539.55 cu in.); Bore and Stroke: 162 mm (6.375 in.) x 165 mm (6.5 in.); Weight: 646.4 kg (1,425 lb)
Summary: The Packard Motor Car Company of Detroit, Michigan produced the world’s first quantity-production 12-cylinder automobile in in 1916, and belief in that engine carried over to aviation in the following year. Particularly beginning with lessons learned with the World War I era Liberty engines, Packard began development of 12-cylinder aircraft engines in 1923 that would better fully meet requirements of the Army and Navy, with a resulting great step forward made in decreasing the weight per horsepower.; The engines in the Packard 2500 series were built in direct drive and geared types. The development of the 3A-2500, like its predecessors the 1A-2500 and 2A-2500, was sponsored by both the Army and the Navy. By 1927, the Model 2500 was the most powerful standard aircraft engine in existence. It powered the Huff-Daland XHB-1 Cyclops, the Martin 3-Purpose Aircraft, Dornier Superwal, and Boeing PB-1. The Packard 3A-2500 was type certificated for commercial use in January 1929.

1926

Materials: Aluminum, Steel, Paint, Preservative coating, Rubber, Brass, Textile, Copper
Dimensions: Height 106.9 cm (42.1 in.), Length 177.2 cm (69.75 in.), Width 74.3 cm (29.25 in.)

National Air and Space Museum

GUID (Link to Original Record): http://n2t.net/ark:/65665/nv9bc986f2e-9a71-4792-81e5-a93114ce46f8