Lorraine 12F Courlis
The Lorraine 12F Courlis was a W-12 (broad arrow) aero engine introduced in France in 1929. It was not widely used.
| 12F Courlis | |
|---|---|
| Type | Water-cooled W-12 piston engine |
| National origin | France |
| Manufacturer | Lorraine-Dietrich |
| First run | Homologated 21 August 1929 |
Design and development
In 1926 Lorraine introduced a series of V-12 and W-12 engines with steel cylinders screwed into aluminium alloy engine blocks. There were two W-12s which shared the name Courlis (Curlew), the first of them was the 12E which provided 340 kW (450 hp) from a swept volume of 24.4 L (1,490 cu in). This was followed by the larger 12F, giving 450 kW (600 hp) from 31.7 L (1,930 cu in).[1][2]
The 12F was officially homologated on 21 August 1929[2] and displayed at the 1930 Paris Salon.[3] Unlike the 12E, which powered many different aircraft types, the 12F was not so widely used.
Variants
- Lorraine 12Fa
- Lorraine 12Fb
- Lorraine 12Fd
Applications
- Hanriot A.3 (1924 STAé specification ?)
- I.A.R. CW-8
- Nieuport-Delage NiD.540
- Nieuport-Delage NiD.580
- Nieuport-Delage NiD.623
- Potez 50
- SAB AB-20
Specifications (12Fa)
Data from L'Aérophile January 1930[2]
General characteristics
- Type: Water-cooled W-12 four-stroke engine
- Bore: 145 mm (5.7 in)
- Stroke: 160 mm (6.3 in)
- Displacement: 31.7 L (1,930 cu in)
- Length: 1.656 m (5 ft 5.2 in)
- Width: 1.140 m (3 ft 8.9 in)
- Height: 1.062 m (3 ft 5.8 in)
- Dry weight: 430 kg (950 lb) without propeller, with Viet starter
Components
- Valvetrain: 4 valves/cylinder, 3 overhead camshafts
- Fuel system: 2 fuel pumps; 6 Zenith carburetters with automatic altitude correction and heated inlets; 2 fixed advance magnetos
- Fuel type: Petrol
- Oil system: Pumped
- Cooling system: Centrifugal water pump
- Reduction gear: optional
- Construction: Steel cylinder in aluminium block; aluminium cylinder head; aluminium pistons; 5 bearing crankshaft
Performance
- Power output: 450 kW (600 hp) at 2,000 rpm nominal; maximum 490 kW (660 hp)
- Compression ratio: 6
- Specific fuel consumption: 0.34 kg/(kW.h) (0.51 lb/(hp.h))
- Oil consumption: 4.2 kg/h (9.3 lb/h)
References
- Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2 ed.). Wellingborough: Patrick Stephens Ltd. p. 95. ISBN 1-85260-163-9.
- "Le Moteur Lorraine 600 CV (12Fa)". L'Aérophile. 38 (1–2): 23. 1–15 January 1930.
- "Premier regard sur les moteurs". Les Ailes (493): 13. 15. 27 November 1930.
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