Wright R-975
Engine Specifications

Type: 9 cylinder air cooled
Diameter: N/A
Length: N/A
Bore: 5.0 inches
Stroke: 5.5 inches
Displacement: 975 cubic inches
Compression Ratio: 6.3 to 1
Dry Weight: 560 lbs.
Ignition: N/A
Carburation: N/A
Fuel: 80 0ctane
Performance: 450 hp @ 2250 rpm for take-off