Menasco Pirate

The Menasco Pirate series are 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.Parker, Dana T. Building Victory: Aircraft Manufacturing in the Los Angeles Area in World War II, pp. 122–24, Cypress, CA, 2013.

Variants 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 Super-charged 150 hp. Menasco D-4 Pirate 125 hp, compression ratio 5.5:1, dry weight 311 lb Menasco D-4-87 Super Pirate 134 hp, Compression ratio 6:1, dry weight 310 lb 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 Argonaut Pirate Aeroneer 1-B Great Lakes 2T-1MS de Havilland Canada DH.82C Menasco Moth (Canada, 136 built) Fairchild 22 C7B Gee Bee Sportster Model D Jones S-125 Ryan ST Stearman-Hammond Y-1 VEF I-17 Willoughby Delta 8

Specifications (Menasco C4S Pirate)

Menasco Pirate

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