Packard 2A-1500, Inverted V-12 Engine
date: label: Date
content: Circa 1925
name: label: Manufacturer
content: Packard Motor Car Company (Detroit, Michigan)
notes: label: Physical Description
content: Type: Reciprocating, inverted, V-type, 12-cylinders, liquid cooled
label: Physical Description
content: Power rating: 447 kW (600 hp) at 2,500 rpm
label: Physical Description
content: Displacement: 25.1 L (1530.4 cu in.)
label: Physical Description
content: Bore and Stroke: 136.5 mm (5.375 in.) x 139.7 mm (5.5 in.)
label: Physical Description
content: Weight: 354 kg (780 lb)
label: Summary
content: In 1923, the Packard Motor Car Company began development of a new series of 12-cylinder aircraft engines that would more fully meet the requirements of the Army and Navy. In these new designs, a great step forward was made in decreasing the weight per horsepower. The first engine employing the new construction, the 268 kW (360 hp) Packard 1300, was built under a Navy contract.
label: Summary
content: While this engine was under development, Packard obtained an Army contract for a refined and enlarged version known as the 1500. This was superseded by the 2A-1500, built in upright direct drive and geared configurations and inverted direct drive configurations. The inverted engine could be mounted with its propeller shaft on top so that the propeller had maximum ground clearance, and also improved pilot visibility.
label: Summary
content: Among aircraft powered by this engine were the Curtiss R3C-3 racer, the two-engine Huff-Daland XB-1 bomber, Boeing FB-5 pursuit aircraft, and Navy PN-10 seaplane.
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: Transferred from the War Department
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19320075000
objectType: label: Type
content: PROPULSION-Reciprocating & Rotary
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Steel, Aluminum, Paint, Rubber, Copper, Ceramic, Preservative coating, Phenolic, Brass
label: Dimensions
content: Length 162.4 cm (63.94 in.), Width 68.2 cm (26.87 in.), Height 87.8 cm (34.56 in.)