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

• Aviméta 92
• Caudron C.251

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))