Continental R-975 Radial Engine Specifications:

Number of Cylinders : 9
Displacement: 973 ci
Bore: 5 inches
Stroke: 5.5 inches
Compression Ratio: 5:1
Aspiraton: Stromberg NA-R9A carburetor with single stage supercharger
Weight: 675 lbs
Length: 41 inches
Diameter: 45 inches
Output: 550hp
First Flight : 194?
Airframes used on: Piasecky HUP Retriever Helicopter, H-25 Mule Helicopter, M2 + M3 Medium Tanks, M4 Sherman Tank, M7 Priest Self Propelled gun, M-18 Hellcat Tank
Cost: $