Allison V-1710
Bore: 5.5 in (139.7 mm) Stroke: 6 in (152.4 mm),Compression ratio: 6.65:1 ,Displacement: 1,710.6 in³ (28.03 L) ,weight: 1,445 lb ,Valvetrain: Two intake and two exhaust valves(sodium-cooled) ex , supercharger: Centrifugal single stage ,output-1,325HP
Used in Curtiss P40, North...