Continental O-470 Explained

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.[1] [2] [3] [4] [5] [6] [7]

Design and development

The first engine in this series was the E165, a 471 cubic inch (7.7 L) engine producing 1650NaN0, and was the first of the Continental's "E" series engines. Later versions were given the company designation of E185 (1850NaN0 continuous) and E225 (2250NaN0). 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 2130NaN0 to 2600NaN0. 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
  • 1650NaN0 at 2050 rpm, dry weight 3510NaN0, Marvel-Schebler MA-4-5 carburetor.
    E165-3
  • 1650NaN0 at 2050 rpm, dry weight 3520NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E165-4
  • 1650NaN0 at 2050 rpm, dry weight 3440NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E185-1
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3440NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E185-2
  • 1850NaN0 at 2300 rpm, dry weight 3510NaN0, Marvel-Schebler MA-4-5 carburetor.
    E185-3
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3520NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E185-5
  • 1850NaN0 at 2300 rpm, dry weight 3430NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E185-8
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3440NaN0, 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
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3520NaN0, 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
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3520NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor.
    E185-11
  • 2050NaN0 at 2600 rpm for five minutes, 1850NaN0 at 2300 rpm continuous, dry weight 3440NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor, identical to E185-8 but with revised mounting brackets.
    E225-2
  • 2250NaN0 at 2650 rpm, dry weight 3590NaN0. Certified 19 July 1951.
    E225-4
  • 2250NaN0 at 2650 rpm, dry weight 3550NaN0. Certified 5 July 1952.
    E225-8
  • 2250NaN0 at 2650 rpm, dry weight 3470NaN0. Certified 12 July 1950.
    E225-9
  • 2250NaN0 at 2650 rpm, dry weight 3630NaN0. Certified 30 October 1950.
    GE260-2X
  • 2600NaN0, flown in the Robertson Skylark SRX-1
    O-470-2
  • 2500NaN0 at 2600 rpm, dry weight 4840NaN0, supercharged model. Certified 2 February 1955.
    O-470-4
  • 2250NaN0 at 2600 rpm, dry weight 4150NaN0, 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, 2050NaN0 at 2600 rpm, dry weight 3520NaN0, Bendix-Stromberg PS-5C or PS-5CD carburetor. When equipped with 18 mm. spark plugs, it is designated 0-470-7A.
    O-470-11
  • 2130NaN0 at 2600 rpm, dry weight 3910NaN0, two sixth order dampers. Certified 19 January 1951.
    O-470-11B
  • 2130NaN0 at 2600 rpm, dry weight 3910NaN0, identical to the 0-470-11 but with 0-470-15 cylinders and pistons. Certified 19 January 1951.
    O-470-13
  • 2250NaN0 at 2600 rpm, dry weight 4150NaN0, one fifth and one sixth order dampers or two sixth order dampers. Certified 19 January 1951.
    O-470-13A
  • 2250NaN0 at 2600 rpm, dry weight 4150NaN0, 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
  • 2130NaN0 at 2600 rpm, dry weight 4050NaN0, 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
  • 2250NaN0 at 2600 rpm, dry weight 3780NaN0. Certified 4 December 1952.
    2400NaN0 at 2600 rpm, dry weight 4100NaN0, similar to O-470-A except increased power, different damper configuration, incorporation of inclined valve cylinders, downdraft pressure carburetor and induction changes. Identical to E185-9. Certified 4 December 1952.
  • O-470-E
  • 2250NaN0 at 2600 rpm, dry weight 3900NaN0, same as O-470-A except downdraft pressure carburetor. Certified 4 December 1952.
    O-470-G
  • 2400NaN0 at 2600 rpm, dry weight 4320NaN0, similar to O-470-M except crankshaft damper configuration, revised oil sump integral cast intake air passage and mounting brackets. Certified 4 December 1952.
    O-470-H
  • 2400NaN0 at 2600 rpm, dry weight 4950NaN0, same as O-470-B with an extension propeller shaft, approved for pusher installations. Certified 4 December 1952.
    O-470-J
  • 2250NaN0 at 2550 rpm, dry weight 3780NaN0, same as O-470-A except reduced max rpm and induction system risers, manifold and balance tube. Certified 4 December 1952.
    O-470-K
  • 2300NaN0 at 2600 rpm, dry weight 4040NaN0, similar to O-470-J except max rpm, crankshaft damper configuration, incorporation of shell-molded cylinder heads and revised mounting brackets. Certified 4 December 1952.
    O-470-L
  • 2300NaN0 at 2600 rpm, dry weight 4040NaN0, same as O-470-K except relocated carburetor, revised intake manifold oil sump. Certified 4 December 1952.
    O-470-M
  • 2400NaN0 at 2600 rpm, dry weight 4100NaN0, same as O-470-B except crankshaft damper configuration and incorporation of shell-molded cylinder heads. Certified 4 December 1952.
    O-470-N
  • 2400NaN0 at 2600 rpm, dry weight 4100NaN0, same as O-470-M except crankshaft damper configuration. Certified 4 December 1952.
    O-470-P
  • 2400NaN0 at 2600 rpm, dry weight 4320NaN0, identical to O-470-G except crankshaft damper configuration. Certified 4 December 1952.
    O-470-R
  • 2300NaN0 at 2600 rpm, dry weight 4010NaN0, same as O-470-L except crankshaft damper configuration. Certified 4 December 1952.
    O-470-S
  • 2300NaN0 at 2600 rpm, dry weight 4010NaN0, same as O-470-R except piston oil cooling and semi-keystone piston rings. Certified 4 December 1952.
    O-470-T
  • 2300NaN0 at 2400 rpm, dry weight 4100NaN0, similar to the O-470-S except crankcase design and max rpm. Certified 4 December 1952.
    O-470-U
  • 2300NaN0 at 2400 rpm, dry weight 4120NaN0, similar to the O-470-S except max rpm rating and crankshaft damper configuration. Certified 4 December 1952.

    Fuel-injected models

    IO-470-A
  • 2400NaN0 at 2600 rpm, dry weight 4320NaN0, equipped with a TCM 5580 fuel injector. Certified 4 December 1952.
    IO-470-C
  • 2500NaN0 at 2600 rpm, dry weight 4100NaN0, equipped with a TCM 5620 or 5827 fuel injector. Certified 4 December 1952.
    IO-470-D
  • 2600NaN0 at 2625 rpm, dry weight 4260NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 14 October 1958.
    IO-470-E
  • 2600NaN0 at 2625 rpm, dry weight 4290NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 26 November 1958.
    IO-470-F
  • 2600NaN0 at 2625 rpm, dry weight 4260NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 3 December 1958.
    IO-470-G
  • 2500NaN0 at 2600 rpm, dry weight 4310NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 30 March 1959.
    IO-470-H
  • 2600NaN0 at 2625 rpm, dry weight 4320NaN0, equipped with a TCM 5620-2 fuel injector. Certified 7 August 1959.
    IO-470-J
  • 2250NaN0 at 2600 rpm, dry weight 4000NaN0, equipped with a TCM 5612-1 fuel injector. Certified 31 July 1959.
    IO-470-K
  • 2250NaN0 at 2600 rpm, dry weight 4000NaN0, equipped with a TCM 5807 fuel injector. Certified 9 June 1960.
    IO-470-L
  • 2600NaN0 at 2625 rpm, dry weight 4290NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 9 March 1960.
    IO-470-LO
  • 2600NaN0 at 2625 rpm, dry weight 4290NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 26 September 1967.
    IO-470-M
  • 2600NaN0 at 2625 rpm, dry weight 4280NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 10 March 1960.
    IO-470-N
  • 2600NaN0 at 2625 rpm, dry weight 4320NaN0, equipped with a TCM 5830 fuel injector. Certified 9 June 1960.
    IO-470-P
  • 2500NaN0 at 2600 rpm, dry weight 4720NaN0, equipped with a TCM 5648 fuel injector. Certified 31 March 1961.
    IO-470-R
  • 2500NaN0 at 2600 rpm, dry weight 4310NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 7 October 1960.
    IO-470-S
  • 2600NaN0 at 2625 rpm, dry weight 4290NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 10 May 1961.
    IO-470-T
  • 2500NaN0 at 2600 rpm, dry weight 4750NaN0, equipped with a TCM 5648 fuel injector. Certified 1 July 1963.
    IO-470-U
  • 2600NaN0 at 2625 rpm, dry weight 4260NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 28 August 1963.
    IO-470-V
  • 2600NaN0 at 2625 rpm, dry weight 4260NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 15 June 1965.
    IO-470-VO
  • 2600NaN0 at 2625 rpm, dry weight 4260NaN0, equipped with a TCM 5648, 5808 or 5832 fuel injector. Certified 26 September 1967.
    GIO-470-A:
  • TSIO-470-B:
  • LIO-470-A
  • 2500NaN0 at 2600 rpm, dry weight 4750NaN0, equipped with a TCM 6022 fuel injector. The same as an IO-470-T, except that the crankshaft turns in opposite direction for use on twin-engined aircraft. Certified 18 March 1964.
    FSO-470-A
  • 2600NaN0 at 3000 rpm, dry weight 5330NaN0, Supercharged model, specifically approved for helicopters. Certified 2 February 1955.

    Applications

    E165
    E185
    E225
    E260
    O-470
    IO-470

    Notes and References

    1. Web site: TYPE CERTIFICATE DATA SHEET NO. E-273 Revision 36. 2008-12-27. Federal Aviation Administration. September 1995. https://web.archive.org/web/20210805153142/http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/E-273_36. 5 August 2021. dead.
    2. Web site: TYPE CERTIFICATE DATA SHEET NO. 3E1 Revision 26. 2008-12-27. Federal Aviation Administration. September 1995. https://web.archive.org/web/20210805153141/https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/3E1_26. 5 August 2021. dead.
    3. Web site: TYPE CERTIFICATE DATA SHEET NO. E-269 Revision 15. 2008-12-27. Federal Aviation Administration. June 1973. https://web.archive.org/web/20210805153142/https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/E-269_15. 5 August 2021. dead.
    4. Web site: TYPE CERTIFICATE DATA SHEET NO. E-281 Revision 8. 2008-12-27. Federal Aviation Administration. November 1973. https://web.archive.org/web/20210805153141/https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/E-281_8. 5 August 2021. dead.
    5. Web site: Continental O-470. 2008-12-28. Shanaberger. Kenneth W.. 2008. https://web.archive.org/web/20080529012252/http://www.shanaberger.com/engines/O-470.htm. 29 May 2008. dead.
    6. Web site: TYPE CERTIFICATE DATA SHEET NO. E-267 Revision 10. 2008-12-28. Federal Aviation Administration. February 1974. https://web.archive.org/web/20210805153140/https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/E-267_10. 5 August 2021. dead.
    7. Web site: TYPE CERTIFICATE DATA SHEET NO. E-246 Revision 20. 2008-12-28. Federal Aviation Administration. March 1974. https://web.archive.org/web/20210805153141/https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/TcdsLookup/E-246_20. 5 August 2021. dead.

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