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The Lutetia 4.C.02 was a small V-4 two-stroke engine designed soon after World War II and intended to power light aircraft.

Lutetia 4.C.02
Type	Air-cooled, 90° V-4 two-stroke engine
National origin	France
Manufacturer	Moteurs Lutetia
Designed by	Marcel Echard
First run	c.1950

Design and development

Marcel Echard was an engine designer with a lifetime interest in two-strokes. His first such engine was built in 1911 and he began work on the 4.C.02 in 1949. By 1953 this engine had achieved its homologation and had been test-flown on a Jodel D.9.[1] The Briffaud GB-6 is the only known application, a one-off aircraft with a short life, though not because of its engine.[2]

Unusually for a two-stroke, the fuel/air mixture was compressed externally rather than in the crankcase.[1]

Applications

• Briffaud GB-6

Specifications

Data from Jane's All the World's Aircraft 1953-54[1]

General characteristics

• Type: air-cooled, 90° V-4 two-stroke engine
• Bore: 76 mm (3.0 in)
• Stroke: 70 mm (2.8 in)
• Displacement: 1.267 l (77.32 cu in)
• Length: 647.5 mm (25.49 in)
• Width: 494 mm (19.4 in)
• Height: 518 mm (20.4 in)
• Dry weight: 46 kg (101 lb)

Components

• Fuel system: standard carburettor followed by compressor injection into cylinders; no crankcase compression.
• Oil system: pressure fed from finned sump by internal pump
• Cooling system: air; heads cast in finned pairs
• Ignition system: twin magnetos, two plugs/cylinder

Performance

• Power output: take-off and maximum continuous, 33 kW (44 hp) at 2,800 rpm; cruise, 23 kW (31 hp) at 2,500 rpm; cruise
• Compression ratio: 7.2
• Fuel consumption: 377 gm/kW/hr (0.535 lb/hp/hr)

References

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