Curtiss OXX

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OXX-6 on display
Type V-8 water-cooled piston engine
National origin United States of America
Manufacturer Curtiss
Developed from Curtiss OX

The Curtiss OXX was an early, dual ignition water-cooled V-8 aero engine derived from the Curtiss OX.[1]


Curtiss OXX-2
Curtiss OXX-3
Curtiss OXX-5
Curtiss OXX-6


Engines on display[edit]

The Cradle of Aviation Museum, Garden City, NY has an OXX-2 on exhibit.

Specifications (OXX-6)[edit]

General characteristics

  • Type: 8-cylinder water-cooled Vee aircraft piston engine
  • Bore: 4.25 in (114 mm)
  • Stroke: 5 in (127 mm)
  • Displacement: 567 in³ (9.3 L)
  • Dry weight: 401 lb (182 kg)


  • Cooling system: Water-cooled



  1. ^ American Aviation Historical Society. American Aviation Historical Society journal, Volumes 33-34. 
  2. ^ "Kansas Aviation Museum". Retrieved 17 April 2012. 
  • Molson, K. M. (1972) "The Curtiss OX-5 Engine." Journal of the American Aviation Historical Society.
  • US Department of Transportation Federal Aviation Administration Type Certificate Data Sheet Curtiss OXX-6 (Group 2 - Domestic engines approved prior to 7/15/29)