Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    CCO - Creative Commons (CC0 1.0)

    This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

    View Manifest

    View in Mirador Viewer

    Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    Type: Reciprocating, Radial, 9 cylinders, air cooled Power rating: 336 kW (450 hp) at 2,300 rpm Displacement: 16.1 L (985 cu in) Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.) Weight: 309 kg (682 lb)

    1 of 9

    CCO - Creative Commons (CC0 1.0)

    This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

    View Manifest

    View in Mirador Viewer

    Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    Type: Reciprocating, Radial, 9 cylinders, air cooled Power rating: 336 kW (450 hp) at 2,300 rpm Displacement: 16.1 L (985 cu in) Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.) Weight: 309 kg (682 lb)

    2 of 9

    CCO - Creative Commons (CC0 1.0)

    This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

    View Manifest

    View in Mirador Viewer

    Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    Type: Reciprocating, Radial, 9 cylinders, air cooled Power rating: 336 kW (450 hp) at 2,300 rpm Displacement: 16.1 L (985 cu in) Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.) Weight: 309 kg (682 lb)

    3 of 9

    CCO - Creative Commons (CC0 1.0)

    This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

    View Manifest

    View in Mirador Viewer

    Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    Type: Reciprocating, Radial, 9 cylinders, air cooled Power rating: 336 kW (450 hp) at 2,300 rpm Displacement: 16.1 L (985 cu in) Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.) Weight: 309 kg (682 lb)

    4 of 9

    CCO - Creative Commons (CC0 1.0)

    This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's Terms of Use page.

    IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu

    View Manifest

    View in Mirador Viewer

    Pratt & Whitney Wasp Jr. R-985-AN-14B "Dancing Engine"

    Type: Reciprocating, Radial, 9 cylinders, air cooled Power rating: 336 kW (450 hp) at 2,300 rpm Displacement: 16.1 L (985 cu in) Bore and Stroke: 132 mm (5.2in.) x 132 mm (5.2 in.) Weight: 309 kg (682 lb)

    5 of 9

    Pratt & Whitney Wasp Jr. R-985-AN-14B

    Wasp Jr. engine is on display at the Udvar-Hazy Center. Aptly nicknamed "The Dancing Engine," it has been sectionalized and motorized to demonstrate the movements of its internal components.
    6 of 9

    Pratt & Whitney Wasp Jr. R-985-AN-14B

    Wasp Jr. engine on display at the Udvar-Hazy Center. Aptly nicknamed "The Dancing Engine," it has been sectionalized and motorized to demonstrate the movements of its internal components.

    7 of 9

    Pratt & Whitney Wasp Jr. R-985-AN-14B

    Wasp Jr. engine on display at the Udvar-Hazy Center. Aptly nicknamed "The Dancing Engine," it has been sectionalized and motorized to demonstrate the movements of its internal components.
    8 of 9

    Pratt & Whitney Wasp Jr. R-985-AN-14B

    Wasp Jr. engine on display at the Udvar-Hazy Center. Aptly nicknamed "The Dancing Engine," it has been sectionalized and motorized to demonstrate the movements of its internal components.

    9 of 9

Display Status:

This object is on display in the Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Boeing Aviation Hangar

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.

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.