Menasco Pirate

Pirate

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

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]

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: 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: Compression ratio 6:1, dry weight 310 lb^[4]
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

Applications

Specifications (Menasco C4S Pirate)

General characteristics

Type: 4-cylinder, air-cooled, in-line, inverted engine
Bore: 4.75 in (12.65 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

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

References

↑ "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.
1 2 3 4 Herschel, Smith. (1986). A History of Aircraft Piston Engines. Sunflower University Press. ISBN 0-07-058472-9.
1 2 3 "Menasco Pirate" (PDF). rgl.faa.gov. Retrieved 2011-05-26.

Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 115.

External links

Wikimedia Commons has media related to Menasco Pirate.

Menasco Motors Company aero engines

Menasco designs	A-4 Pirate A-6 Buccaneer B-4 Pirate B-6 Buccaneer C-4 Pirate C-6 Buccaneer C-6S Super Buccaneer D-4 Pirate D-4B Super Pirate D-6S Super Buccaneer M-50 Pirate Unitwin 2-544 L-365 XIV-2040 XH-4070 RJ37

Licensed designs	B-2 O-45

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