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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

На других языках

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- [en] Lorraine 12F Courlis

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[it] Lorraine 12 F

Il Lorraine 12 F fu un motore aeronautico 12 cilindri a W raffreddato a liquido sviluppato dall'azienda francese Lorraine-Dietrich nei tardi anni venti del XX secolo e commercializzato dal consorzio Société Générale Aéronautique (SGA) pur mantenendo il marchio Lorraine.

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