Menasco C4

Menasco C4

The Menasco C4 "Pirate" was a popular 4-cylinder, air-cooled, in-line, inverted, aero-engine, for light general and sport aircraft in the 1930's and 1940's. The 6-cylinder Menasco engines had the name "Buccaneer", while the 4-cylinder engines had the name "Pirate". The Menasco engines were interesting in that they came in both supercharged and non-supercharged models. The supercharged models had the "S" suffix added to their designation to show supercharging. The supercharged models had superior performance at higher altitudes with a relatively small increase in dimensions and weight.

pecifications (Menasco C4 Pirate)

pistonspecs

type=4-cylinder, air-cooled, in-line, inverted engine
bore=121mm (4.75in)
stroke=130mm (5.125in)
displacement=5.9 Liters (363cu in)
length=1,206mm (47.5in)
diameter=
width=368mm (14.5in)
height=724mm (28.5in)
weight=129kg (284lb)
valvetrain=1 inlet and 1 exhaust valve per cylinder
supercharger=
turbocharger=
fuelsystem=1 Stromberg Carburetor
fueltype=73 octane
oilsystem=
coolingsystem=Air
power=125hp @ 2,175 RPM max/95hp @ 1,975 RPM cruise
specpower=
compression=5.50:1
fuelcon=
specfuelcon=
oilcon=
power/weight=2.99lb/hp @ cruise

pecifications (Menasco C4S Pirate)

pistonspecs

type=4-cylinder, air-cooled, in-line, inverted engine
bore=121mm (4.75in)
stroke=130mm (5.125in)
displacement=5.9 Liters (363cu in)
length=1,206mm (47.5in)
diameter=
width=449mm (17.7in)
height=724mm (28.5in)
weight=135kg (299lb)
valvetrain=1 inlet and 1 exhaust valve per cylinder
supercharger=
turbocharger=
fuelsystem=1 Stromberg Carburetor
fueltype=73 octane
oilsystem=
coolingsystem=Air
power=150hp @ 2,260 RPM max/112hp @ 2,025 RPM cruise
specpower=
compression=5.50:1
fuelcon=
specfuelcon=
oilcon=
power/weight= 2.67lb/hp @ cruise

References

* http://www.oldengine.org/members/diesel/Duxford/usaero8.htm
*


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