The Continental O-470 engine is a family of carbureted and fuel-injected six-cylinder, horizontally opposed, air-cooled aircraft engines that was developed especially for use in light aircraft by Continental Motors. Engines designated "IO" are fuel-injected.
The family also includes the E165, E185, E225 and the E260 engines, and several specialty variants. It has been in production since 1950.
Design and development
The first engine in this series was the E165, a 471 cubic inch (7.7 L) engine producing , and was the first of the Continental's "E" series engines. Later versions were given the company designation of E185 ( continuous) and E225 (). When the US military gave them all the designation of O-470 the company adopted the designation and future models were known as Continental O-470s.
The O-470 family of engines covers a range from to . The engines were developed in the late 1940s and certification was applied for on 23 October 1950 on the regulatory basis of Part 13 of the US Civil Air Regulations effective 1 August 1949 as amended by 13-1. The first O-470 model was certified on 19 January 1951.
Variants
Carbureted models
E165-2
at 2050 rpm, dry weight , Marvel-Schebler MA-4-5 carburetor. E165-3 at 2050 rpm, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E165-4 at 2050 rpm, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E185-1 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E185-2 at 2300 rpm, dry weight , Marvel-Schebler MA-4-5 carburetor. E185-3 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E185-5 at 2300 rpm, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E185-8 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor, identical to E185-1 but with revised starter drive with dog rather than gear type starter. E185-9 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor, identical to E185-3 except for revised starter drive to accommodate dog rather than gear type starter. E185-10 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. E185-11 at 2600 rpm for five minutes, at 2300 rpm continuous, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor, identical to E185-8 but with revised mounting brackets. E225-2 at 2650 rpm, dry weight . Certified 19 July 1951. E225-4 at 2650 rpm, dry weight . Certified 5 July 1952. E225-8 at 2650 rpm, dry weight . Certified 12 July 1950. E225-9 at 2650 rpm, dry weight . Certified 30 October 1950. GE260-2X , flown in the Robertson Skylark SRX-1 O-470-2 at 2600 rpm, dry weight , supercharged model. Certified 2 February 1955. O-470-4 at 2600 rpm, dry weight , previously designated 0-470-13B. It is identical to the Model 0-470-13A except for the Bendix-Stromberg Model PS-5CD carburetor in place of the PS-5C. Certified 19 January 1951. O-470-7 Non-certified military engine, identical to E185-3, at 2600 rpm, dry weight , Bendix-Stromberg PS-5C or PS-5CD carburetor. When equipped with 18 mm. spark plugs, it is designated 0-470-7A. O-470-11 at 2600 rpm, dry weight , two sixth order dampers. Certified 19 January 1951. O-470-11B at 2600 rpm, dry weight , identical to the 0-470-11 but with 0-470-15 cylinders and pistons. Certified 19 January 1951. O-470-13 at 2600 rpm, dry weight , one fifth and one sixth order dampers or two sixth order dampers. Certified 19 January 1951. O-470-13A at 2600 rpm, dry weight , identical to the 0-470-13 but with an additional tachometer drive through the camshaft gear and one fifth and one sixth order crankshaft damper. Certified 19 January 1951. O-470-15 at 2600 rpm, dry weight , identical to the 0-470-11 except: four sixth order damper crankshaft, propeller control provisions, revised engine mounting brackets and long skirt pistons. Certified 19 January 1951. O-470-A at 2600 rpm, dry weight . Certified 4 December 1952.