Curtiss K-12, V-12 Engine

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    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

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    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.

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    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

    2 of 6

    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

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    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

    3 of 6

    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

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    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

    4 of 6

    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

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    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

    5 of 6

    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

    Curtiss K-12, V-12 Engine

    Type: Reciprocating, 12 cylinders, V-type, water cooled Power rating: 280 kW (375 hp) at 2,250 rpm Displacement: 18.8 L (1,145.09 cu in.) Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.) Weight: 307.5 kg (678 lb)

    6 of 6

Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

In 1916 Curtiss engineer Charles Kirkham began designing an engine to compete with the Wright Corporation's Hispano-Suiza. By late 1917, the prototype K-12 (K for Kirkham) was bench tested. While it met its design objectives of high power, low frontal area, compact size, and low weight, the engine encountered technical difficulties during development. Kirkham left Curtiss in 1919, and Arthur Nutt took over the project, eventually producing the D-12, which became a highly successful racing and military power plant in the 1920s.

This engine is manufacturer's number 5 out of about 20 built. The K-12 powered the Curtiss Navy 18T Wasp triplane and the Army Curtiss 18B Hornet biplane. In 1919 Curtiss test pilot Roland Rholfs set a new world's altitude record of 10,641 m (34,910 ft) with the 18T.