Lorraine 7M Mizar

7M Mizar
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.

Variants

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

Applications

Specifications

Data from Société Générale Aeronautique

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))

References

Notes

↑ 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.

Bibliography

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.
Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2nd ed.). Cambridge, England: Patrick Stephens Limited. ISBN 978-1-85260-163-8.

[SGA1132Mizar-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.

v t e Lorraine-Dietrich aero engines
V- and W- piston engines	8B 12D 12E Courlis 12F Courlis AM-6 12Q Eider 12H Pétrel 12Rcr Radium 12R Sterna 18G Orion
Radial piston engines	5P 7M Mizar 9N Algol 14A 18F Sirius
See also: Lorraine-Dietrich aero-engines