Wright CH-2120 Radial 12 Engine

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    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    1 of 9

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    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    2 of 9

    Usage Conditions Apply

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    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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    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    3 of 9

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    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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    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    4 of 9

    Usage Conditions Apply

    There are restrictions for re-using this media. 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

    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    5 of 9

    Usage Conditions Apply

    There are restrictions for re-using this media. 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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    View in Mirador Viewer

    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    6 of 9

    Usage Conditions Apply

    There are restrictions for re-using this media. 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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    View in Mirador Viewer

    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    7 of 9

    Usage Conditions Apply

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    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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    View in Mirador Viewer

    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

    8 of 9

    Usage Conditions Apply

    There are restrictions for re-using this media. 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

    Wright CH-2120 Radial 12 Engine

    Type: Reciprocating, 12 cylinders, 2-rows, radial, air cooled Power rating: 746 kW (1,000 hp) at 2,400 rpm Displacement: 34 L (2,075 cu in.) Bore and Stroke: 156 mm (6.125 in.) x 152 mm (6.0 in.) Weight: 544 kg (1,200 lb)

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In the early 1930s, the Navy supported development by Wright of two new liquid-cooled engines, the H-2120 and the V-1800, in a special "high-speed development program." This was undertaken because of concern over growing superiority of foreign airplanes at top speed, especially as demonstrated in the Schneider Trophy contests. The H-2120 was the first of these engines, and proved unsuccessful.

It was derived from the Curtiss H-1640, a very small diameter air-cooled engine. The small diameter of the experimental engine, considered important for drag reduction, proved to be a difficult technology due to excessive angularity of the connecting rods and other problems. Testing and development continued to 1936, when a 100-hour development test was run. The Navy then withdrew support from the project, primarily because it decided to focus on air-cooled engines. Wright, convinced that the design was mechanically very poor, made little effort to persuade the Navy to change its decision and dropped the project.