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Menasco Pirate

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Menasco Pirate

Pirate
Type Piston aero engine
Manufacturer Menasco Motors Company

The Menasco Pirate series were popular 4-cylinder, air-cooled, in-line, inverted, aero-engines, for use in light general and sport aircraft during the 1930s and 1940s.[1] The Menasco engines were interesting in that they came in both normally aspirated and supercharged forms, with the supercharged models exhibiting superior performance at higher altitudes, with a relatively small increase in dimensions and weight. The supercharged models had the S suffix added to their designation to show supercharging.

Variants

Menasco A-4 Pirate (also listed as Menasco 4A)
90hp[2]
Menasco B-4 Pirate
95hp[2]
Menasco C-4 Pirate (Military designation L-365)
125hp[2]
compression ratio 5.8: 1, dry weight 300lbs[3]
Menasco Pirate C-4S
150hp[2]
Menasco D-4 Pirate
125hp, compression ratio 5.5: 1, dry weight 311lbs[3]
Menasco D-4-87 Super Pirate
compression ratio 6: 1, dry weight 310lbs[3]
Menasco M-50 Pirate

Applications

Specifications (Menasco C4S Pirate)

General characteristics

  • Type: 4-cylinder, air-cooled, in-line, inverted engine
  • Bore: 121 mm (4.75 in)
  • Stroke: 130 mm (5.125 in)
  • Displacement: 5.9 L (363 cu in)
  • Length: 1,206 mm (47.5 in)
  • Width: 449 mm (17.7 in)
  • Height: 724 mm (28.5 in)
  • Dry weight: 135 kg (299 lb)

Components

  • Valvetrain: 1 inlet and 1 exhaust valve per cylinder
  • Fuel system: 1 Stromberg Carburetor
  • Fuel type: 73 octane
  • Cooling system: Air

Performance

See also

References

External links

  • TC67.pdf
  • www.bombercommandmuseum.ca
  • www.aircraft-manuals.com
  • www.oldengine.org

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