Menasco Pirate

The Menasco Pirate series were four-cylinder, air-cooled, in-line, inverted aero-engines, built by the Menasco Motors Company of Burbank, California, for use in light general and sport aircraft during the 1930s and 1940s.[1] The Menasco engines 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.[2]

Pirate
Type Piston aero engine
National origin United States
Manufacturer Menasco Motors Company
First run 1930s
Major applications Great Lakes 2T-1MS
Ryan ST

Variants
Menasco A-4 Pirate (also listed as Menasco 4A)
90 hp.[3]
Menasco B-4 Pirate
95 hp.[3]
Menasco C-4 Pirate (Military designation L-365)
125 hp.[3] Compression ratio 5.8: 1, dry weight 300 lb[4]
Menasco Pirate C-4S
Super-charged 150 hp.[3]
Menasco D-4 Pirate
125 hp, compression ratio 5.5:1, dry weight 311 lb[4]
Menasco D-4-87 Super Pirate
134 hp,Compression ratio 6:1, dry weight 310 lb[4]
Menasco L-365-1
military designation for the C4-4LA
Menasco L-365-3
similar to -1 but changes to cylinder heads, lubrication and carburettor

Applications

Specifications (Menasco C4S Pirate)

General characteristics
  • Type: 4-cylinder, air-cooled, in-line, inverted engine
  • Bore: 4.75 in (120.65 mm)
  • Stroke: 5.125 in (130.18 mm)
  • Displacement: 363.27 cu in (5.95 L)
  • Length: 47.5 in (1,206 mm)
  • Width: 17.7 in (449 mm)
  • Height: 28.5 in (724 mm)
  • Dry weight: 299 lb (135 kg)

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

Comparable engines

Related lists

References
  1. "Menasco Pirate". www.bombercommandmuseum.ca. 2011. Archived from the original on March 24, 2012. Retrieved May 26, 2011.
  2. Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 122–24, Cypress, CA, 2013.
  3. Herschel, Smith. (1986). A History of Aircraft Piston Engines. Sunflower University Press. ISBN 0-07-058472-9.
  4. "Menasco Pirate" (PDF). rgl.faa.gov. Retrieved May 26, 2011.
  • Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 115.
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