Continuing to improve his early aircraft
engines, Glenn Curtiss introduced his Model O in 1912 (per OX-5 Aviation
In 1913, an improved O called the OX was introduced. The OX powered the
U.S. JN-4 Jenny and the British DH 6. The availability of the OX at
surplus prices made it the engine of choice for many postwar aircraft.
Over 8,000 OX engines were produced.
- O: 75 hp (56 kW)
- OX: 90 hp (67 kW)
- Eight cylinders, water-cooled, vee
- 503 cubic inches (8.2 litres)