Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"
date: label: Date
content: 1942
name: label: Manufacturer
content: Pratt & Whitney
notes: label: Physical Description
content: Type: Reciprocating, Radial, 9 cylinders, air cooled
label: Physical Description
content: Power rating: 336 kW (450 hp) at 2,300 rpm
label: Physical Description
content: Displacement: 16.1 L (985 cu in)
label: Physical Description
content: Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.)
label: Physical Description
content: Weight: 309 kg (682 lb)
label: Summary
content: Begun in 1925 by former Wright Aeronautical employees as a spinoff from a machine tool company, Pratt & Whitney became one of the world’s largest manufacturers of aircraft engines, and the Wasp Jr. is one of the most successful reciprocating engines ever built. Pratt & Whitney introduced it as a complement to the highly successful Wasp and Hornet families of engines in 1930. The Wasp Jr. was essentially a Wasp of reduced dimensions. Pratt & Whitney and its licensees manufactured over 39,000 versions of the R-985 until 1953 for a wide variety of military and commercial aircraft, including light transports, trainers, sport aircraft, and helicopters.
label: Summary
content: The R-985-AN-14B powered the McDonnell XHJH-1 and XHJD-1 Whirlaway helicopters and the Avro Anson V trainer. This Wasp Jr.-aptly nicknamed "The Dancing Engine"- has been sectionalized and motorized to demonstrate the movements of its internal components.
place: label: Country of Origin
content: United States of America
setName: label: See more items in
content: National Air and Space Museum Collection
label: Location
content: Steven F. Udvar-Hazy Center in Chantilly, VA
label: Hangar
content: Boeing Aviation Hangar
creditLine: label: Credit Line
content: Transferred from the Naval Aviation Museum
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A19761858000
objectType: label: Type
content: PROPULSION-Reciprocating & Rotary
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Overall - aluminum and steel.
label: Dimensions
content: Height: 117.5 cm (46.25 in.), Width: 117.5 cm (46.25 in.), Depth: 109.4 cm (43.06 in.)