In 1947, Continental introduced the E165 and E185, both 471 cubic inch displacement flat-six piston engines. A later development, the E225, was able to produce 225 hp.
The U.S. military gave all these engines the designation O-470 which Continental later adopted.

models

• E-185-3: 185 hp (138 kW)
• O-470-4: 225 hp (168 kW)
• O-470-A: 225 hp (168 kW)
• IO-470-D: 260 hp (194 kW)
• IO-470-E: 260 hp (194 kW)
• O-470-M: 240 hp (179 kW)
• IO-470-P: 250 hp (186 kW)

specifications

• 6-cylinder, horizontally-opposed, air-cooled piston engine
• Displacement: 471 cubic inches (7.7 litres)
• Bore x stroke: 5 x 4 inches

used by

• Beech T-34 Mentor
• Cessna 180
• Cessna 210
• Cessna 310
• Nardi FN.333 Riviera
• North American Navion