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Curtiss OX-5 V-8 Engine


Display Status:

This object is on display in the Golden Age of Flight exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

More than 10,000 of these V-8 engines were manufactured, most of them for use in Curtiss JN-4 Jenny trainers. After World War I, thousands of OX-5s and Jennies were sold to the public at a fraction of their original cost to the government. In addition, during the 1920s, the OX-5 engine powered airplanes developed for civil aircraft by Waco, Laird, Curtiss, Fairchild, Alexander, Travel Air, and many other firms.

The availability of a well-proven, inexpensive engine in such quantity was a mixed blessing -- it allowed many people to fly who could not afford a more expensive engine, but manufacturers of more modern power plants suffered.

Collection Item Long Description:


Curtiss OX-5 V-8 Engine

Data Source

National Air and Space Museum


Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


Glenn H. Curtiss

Credit Line

On Loan from the War Department, Air Service, Washington, D.C.




Length 144.1 cm (56.75 in.), Width 75.6 cm (29.75 in.,) Height 93.3 cm (36.75 in.)

Country of Origin

United States of America



Physical Description

  • Type: Reciprocating, water-cooled, V-8
  • Power rating: 67 kW (90 hp) at 1,200 rpm
  • Displacement: 8.3 L (502.8 cu in)
  • Bore and Stroke: 102 mm (4 in.) x 127 mm (5 in.)
  • Weight (dry): 145 kg (320 lb)


PROPULSION-Reciprocating & Rotary

Inventory Number