Curtiss D-12

The Curtiss D-12, sometimes identified with the military designation Curtiss V-1150, was an aircraft engine of 18.8 liter displacement. 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.^[1][2]

D-12/Felix
Preserved D-12 engine
Type	V-12 piston engine
Manufacturer	Curtiss Aeroplane and Motor Company
First run	1923

The D-12 was one of the first truly successful aluminum cast-block engines and was extremely influential in the interwar period. Numerous engines trace their design to the D-12, among them the Packard 1A-1500, Rolls-Royce Kestrel and Junkers Jumo 210.

Applications

D-12

• Boeing Model 15
• Curtiss CR
• Curtiss Falcon
• Curtiss P-5
• Curtiss PW-8
• Curtiss R2C
• Fokker D.XII
• Macchi M.33
• Wittman D-12 Bonzo

Felix

• Fairey Firefly I
• Fairey Fox

Specifications (Curtiss D-12/Felix)

Data from Lumsden.^[3]

General characteristics

• 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 (18,765.04 cc)
• 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)

Components

• Cooling system: Liquid-cooled

Performance

• Power output: 443 hp (330 kW) at 2,200 rpm
• Compression ratio: 6:1

See also

Comparable engines

• Packard 1A-1500
• Rolls-Royce Kestrel

Related lists

• List of aircraft engines