Lorraine 7M Mizar

The Lorraine 7M Mizar, also called the Lorraine 240CV Mizar, was a seven-cylinder air-cooled radial engine designed and built in France during the 1920s and 1930s. Nominal power was given as 240 hp (180 kW) at 1500rpm (maximum continuous power), with a maximum output of 283 hp (211 kW) at 1800 rpm.

7M Mizar
Type 7-cylinder air-cooled piston aero engine
National origin France
Manufacturer Lorraine-Dietrich

Variants
7Ma Mizar
7Mb Mizar
7Me Mizar
7Mer Mizar

Applications

Specifications

Data from Société Générale Aeronautique[1]

General characteristics

  • Type: 7-cylinder air-cooled radial piston engine, left hand rotation (facing the propeller)
  • Bore: 140 mm (5.51 in)
  • Stroke: 150 mm (5.91 in)
  • Displacement: 16.163 l (986.33 cu in)
  • Length: 1,190 mm (46.85 in)
  • Diameter: 1,240 mm (48.82 in)
  • Dry weight: 265 kg (584 lb)

Components

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

Performance

  • Power output: 283 hp (211 kW) at 1800 rpm (maximum)
    240 hp (180 kW) at 1500 rpm (maximum continuous)
  • Compression ratio: 5
  • Specific fuel consumption: 0.308 kg/(kW h) (0.507 lb/(hp h))
  • Oil consumption: 0.0161 kg/(kW h) (0.0265 lb/(hp h))
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References

Notes
  1. Revue de la Société Générale Aeronautique (PDF) (in French). Paris: Société Générale Aeronautique. November 1932. pp. 22–24. Archived from the original (PDF) on 17 October 2014. Retrieved 12 October 2014.

Bibliography
  • Revue de la Société Générale Aeronautique (PDF) (in French). Paris: Société Générale 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.
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