Curtiss D-12

D-12/Felix

Preserved D-12 engine
Type	V-12 piston engine
Manufacturer	Curtiss Aeroplane and Motor Company
First run	1923
Developed from	Curtiss C-12

The Curtiss D-12, sometimes identified with the military designation Curtiss V-1150, 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.^[1]^[2]

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

Applications

D-12

Felix

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 (18.8 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)

Components

Cooling system: Liquid-cooled

Performance

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

References

Notes

↑ Lumsden 2003, p.148.
↑ Skyways. July 1999. Missing or empty |title= (help)
↑ Lumsden 2003, p.149.

Bibliography

Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

External links

Wikimedia Commons has media related to Curtiss D-12.

Great Aircraft Engines - Curtiss D-12
"The Curtiss Model CD-12 400 H.P. Aero Engine" a 1922 Flight article on the CD-12

Curtiss aircraft engines

Piston engines	A-2 B-8 C-6 Challenger D-12 H-1640 K-12 Model K OX-5 OXX R-600 V-1570 V-2

Fairey aero engines

Four-stroke piston engines	Felix Monarch Prince (H16) Prince (V12) Prince 4 (H24) Super Prince (V12)

United States military piston aircraft engine designation system

H (four-bank H-configuration inline)	H-1640 XH-2240 H-2470 XH-2600 XH-3130 XH-3730 H-4070

I (inverted-V inline)	IV-1430 IV-2040 IV-2220

L (single-bank inline)	L-330 L-365 L-375 L-390 L-410 L-440 L-510 L-825

O (opposed)	O-15 O-40 O-45 O-90 O-100 O-145 O-150 O-170 O-175 O-180 O-190 O-200 (C) O-200 (F) O-205 O-235 O-290 O-300 O-335 O-360 (C) O-360 (L) O-405 O-425 O-435 O-470 O-480 O-520 O-540 (F) O-540 (L) O-550 O-580 O-805 O-1230

R (radial)	R-250 R-265 R-270 R-370 (LB) R-370 (K) R-420 R-440 R-500 R-540 (W) R-540 (K) R-545 R-550 R-600 R-670 R-680 R-720 R-755 R-760 R-790 R-830 R-915 R-975 DR-980 R-985 R-1044 R-1300 R-1340 R-1454 R-1510 R-1535 R-1640 R-1670 R-1690 R-1750 R-1820 R-1830 R-1860 R-2000 R-2060 R-2160 R-2180 R-2600 R-2800 R-3350 R-4090 R-4360 XR-7755

V (upright-V inline)	V-720 V-770 V-1150 V-1237 V-1400 V-1410 V-1440 V-1460 V-1510 V-1560 V-1570 V-1650 (L) V-1650 (P) V-1710 V-1950 V-3420

W (three-bank W-configuration inline)	W-2779

See also: X-1800 US military gas turbine aeroengines Piston engine configurations

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