Pratt & Whitney R-2800 CB3
Engine Specifications


Type: 18 cylinder air cooled
Diameter: 52.80 inches
Length: 81.40 inches
Bore: 5.75 inches
Stroke: 6 inches
Displacement: 2804 cubic inches
Compression Ratio: 6.75 to 1
Dry Weight: single speed 2357 lbs.
two speed 2390 lbs.
Low/High Blower Gear Ratios: 7.29 to 1
Ignition: Scintilla DLN-10 low tension
Carburation: Stromberg PR-58E5
Fuel Grade: 100/130 or 108/135 octane
Performance: Take-off: 2400 hp @ 2800 rpm wet  ADI
                 2050 hp @ 2700 rpm dry
Normal:   1800 hp @ 2600 rpm