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The Lorraine 5P, also called the Lorraine 100CV, Lorraine 110CV and Lorraine 120CV, was a family of five-cylinder air-cooled radial engines designed and built in France by Lorraine-Dietrich during the 1920s and 1930s. Nominal engine powers were given as 100–110–120 hp (75–82–89 kW) at 1250 / 1400 / 1350 rpm (maximum continuous power), with maximum outputs of 108–125–150 hp (81–93–112 kW) at 1350 / 1650 / 1700 rpm.

Variants

5Pa

also called the Lorraine 100CV, 8.59 litres (524.19 cu in) (125x140)

5Pb

also called the Lorraine 110CV, 8.59 litres (524.19 cu in) (125x140)

5Pc

also called the Lorraine 120CV, 9.3 litres (567.52 cu in) (130x140)

Applications

• Bloch 61
• Caudron C.221
• Dewoitine 481
• FBA 310 (5Pc)
• SAB DB-81
• Caproni Ca.97

Specifications (5Pc)

Data from Societe Generale Aeronautique

General characteristics

• Type: 5-cylinder air-cooled radial piston engine, left hand rotation (facing the propeller)
• Bore: 130 mm (5.12 in)
• Stroke: 140 mm (5.51 in)
• Displacement: 9.3 L (567.52 cu in)
• Length: 970 mm (38.19 in)
• Diameter: 1,125 mm (44.29 in)
• Dry weight: 156.35 kg (344.7 lb)

Components

• Valvetrain: pushrod operated overhead valves, two per cylinder
• Oil system: pressure fed
• Cooling system: air-cooled

Performance

• Power output: 150 hp (110 kW) at 1700 rpm (maximum)

  120 hp (89 kW) at 1350 rpm (maximum continuous)

• Compression ratio: 5.25
• Specific fuel consumption: 0.282 kg/(kW h) (0.463 lb/(hp h))
• Oil consumption: 0.0107 kg/(kW h) (0.0176 lb/(hp h))

References

Notes

1. Revue de la Societe Generale Aeronautique (PDF) (in French). Paris: Societe Generale Aeronautique. November 1932. pp. 19–21. Archived from the original (PDF) on 17 October 2014. Retrieved 12 October 2014.

Bibliography

• Revue de la Societe Generale Aeronautique (PDF) (in French). Paris: Societe Generale Aeronautique. November 1932. pp. 22–24. Archived from the original (PDF) on 17 October 2014. Retrieved 12 October 2014.
• Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. ISBN 978-1-85260-163-8.

• 1920s aircraft piston engines
• Lorraine aircraft engines