B6/B6S

The Menasco B6 "Buccaneer" was a popular 6-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 B6 Buccaneer)

pistonspecs

type=6-cylinder, air-cooled, in-line, inverted engine
bore=114mm (4.5in)
stroke=130mm (5.125in)
displacement=8 Liters (489cu in)
length=1,508mm (59.4in)
diameter=
width=300mm (11.8in)
height=719mm (28.3in)
weight=180.5kg (398lb)
valvetrain=1 inlet and 1 exhaust valve per cylinder
supercharger=
turbocharger=
fuelsystem=1 Stromberg Carburetor
fueltype=73 octane
oilsystem=
coolingsystem=Air
power=160hp @ 1,975 RPM max/120hp @ 1,800 RPM cruise
specpower=
compression=5.50:1
fuelcon=
specfuelcon=
oilcon=
power/weight=3.32 lb/hp @ cruise

pecifications (Menasco B6S Buccaneer)

pistonspecs

type=6-cylinder, air-cooled, in-line, inverted engine
bore=114mm (4.5in)
stroke=130mm (5.125in)
displacement=8 Liters (489cu in)
length=1,527mm (60.125in)
diameter=
width=381mm (15in)
height=719mm (28.3in)
weight=192kg (423lb)
valvetrain=1 inlet and 1 exhaust valve per cylinder
supercharger=
turbocharger=
fuelsystem=1 Stromberg Carburetor
fueltype=73 octane
oilsystem=
coolingsystem=Air
power=200hp @ 2,250 RPM max/150hp @ 2,025 RPM cruise
specpower=
compression=5.50:1
fuelcon=
specfuelcon=
oilcon=
power/weight=2.82 lb/hp @ cruise

References

* http://www.oldengine.org/members/diesel/Duxford/usaero9.htm
*