The Curtiss D-12 was an aero engine of 18.8 litres capacity. It was a water-cooled V12, producing 443 hp (330 kW) and weighing 693 lb (314 kg). It was designed by Arthur Nutt in 1921 and used in the Curtiss CR-3 for the 1923 Schneider Trophy race. Fairey Aviation of England imported 50 Curtiss built examples in 1926, renaming them the Fairey Felix. 
Specifications (Curtiss D-12/Felix)
Data from Lumsden
- Type: 12-cylinder liquid-cooled 60-degree V
- Bore: 4.5 in (114.3 mm)
- Stroke: 6.0 in (152.4 mm)
- Displacement: 1,145 cu in (18.8 liters)
- Length: 56.75 in (1441 mm)
- Width: 28.25 in (717.5 mm)
- Height: 34.75 in (882.6 mm)
- Dry weight: 693 lb (314 kg)
- Cooling system: Liquid-cooled
- Comparable engines
- Related lists
- ^ Lumsden 2003, p.148.
- ^ Skyways. July 1999.
- ^ Lumsden 2003, p.149.
- Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.