Packard 3A-2500 Geared Drive, V-12 Engine
date: label: Date
content: 1926
name: label: Manufacturer
content: Packard Motor Car Company (Detroit, Michigan)
notes: label: Physical Description
content: Type: Reciprocating, 12 cylinders, V-type, geared drive, liquid-cooled
label: Physical Description
content: Power rating: 596.6 kW (800 hp) at 2,000 rpm
label: Physical Description
content: Displacement: 41.6 L (2,539.55 cu in.)
label: Physical Description
content: Bore and Stroke: 162 mm (6.375 in.) x 165 mm (6.5 in.)
label: Physical Description
content: Weight: 646.4 kg (1,425 lb)
label: Summary
content: 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.
label: Summary
content: 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.
place: label: Country of Origin
content: United States of America
setName: label: See more items in
content: National Air and Space Museum Collection
creditLine: label: Credit Line
content: Gift of Florence Air and Missile Museum
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19660004000
objectType: label: Type
content: PROPULSION-Propellers & Impellers
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Aluminum, Steel, Paint, Preservative coating, Rubber, Brass, Textile, Copper
label: Dimensions
content: Height 106.9 cm (42.1 in.), Length 177.2 cm (69.75 in.), Width 74.3 cm (29.25 in.)