The Continental R-670 series of engines are one of the most widely used light radial aircraft engines in the world. Originally designed in the 1930s, the 7 cylinder 4-cycle radial aircraft engine was used on a number of aircraft including the Cessna 190 and numerous Waco’s including the UPF-7. During WWII they were mass produced for the Stearman PT-17 and the Fairchild PT-23 training aircraft. Build date for this specific engine was in 1941.

Specifications

• Displacement: 668 cubic inches
• Power output: 225HP @ 2200 RPM
• Dry Weight: 465lbs
• Bore: 5 1/8 in
• Stroke: 4 5/8 in
• Compression Ratio: 5.4 to 1
• Fuel: 73 octane
• Firing order: 1-3-5-7-2-4-6

Similar Engines: Jacobs R-755 and the 9 cylinder Lycoming R-680