|Type||Piston aero engine|
|National origin||United States|
|Manufacturer||Menasco Motors Company|
|Major applications||Great Lakes 2T-1MS
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. 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.
- Menasco A-4 Pirate (also listed as Menasco 4A)
- 90 hp.
- Menasco B-4 Pirate
- 95 hp.
- Menasco C-4 Pirate (Military designation L-365)
- 125 hp. Compression ratio 5.8: 1, dry weight 300 lb
- Menasco Pirate C-4S
- 150 hp.
- Menasco D-4 Pirate
- 125 hp, compression ratio 5.5:1, dry weight 311 lb
- Menasco D-4-87 Super Pirate
- Compression ratio 6:1, dry weight 310 lb
- Menasco M-50 Pirate
- 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
Specifications (Menasco C4S Pirate)
- 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)
- Valvetrain: 1 inlet and 1 exhaust valve per cylinder
- Fuel system: 1 Stromberg Carburetor
- Fuel type: 73 octane
- Cooling system: Air
- Power output: 150 hp at 2,260 RPM max/112hp at 2,025 RPM cruise
- Compression ratio: 5.5:1
- Power-to-weight ratio: 0.37hp/lb at cruise
- Comparable engines
- Alfa Romeo 110
- Argus As 8
- Blackburn Cirrus Major
- de Havilland Gipsy Major
- Elizalde Tigre IV
- Hirth HM 504
- Related lists
- "Menasco Pirate". www.bombercommandmuseum.ca. 2011. Retrieved 2011-05-26.
- Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 122–24, Cypress, CA, 2013.
- Herschel, Smith. (1986). A History of Aircraft Piston Engines. Sunflower University Press. ISBN 0-07-058472-9.
- "Menasco Pirate" (PDF). rgl.faa.gov. Retrieved 2011-05-26.
- Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 115.
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