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Lorraine 7M Mizar

From Wikipedia, the free encyclopedia

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

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.


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



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)


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


  • 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))



  1. ^ Revue de la Société Générale Aéronautique (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.


This page was last edited on 25 September 2020, at 14:28
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