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The Continental O-240 engine is a four-cylinder, horizontally opposed, air-cooled aircraft engine that was developed in the late 1960s for use in light aircraft by Continental Motors, Inc. The first O-240 was certified on 7 July 1971.cite-ref-e7so-1-0[1]cite-ref-e11eu-2-0[2]

• Design and development

• Variants

• Applications

• Specifications (IOF-240-B)

• General characteristics

• Components

• Performance

• See also

• References

• Notes

• Bibliography

The 130 hp (97 kW) O-240 was a new engine design derived from the six-cylinder Continental O-360 and introduced in 1971. It is generally similar in overall dimensions to the Continental O-200, but with a higher 8.5:1 compression ratio, designed to run on 100/130 avgas. The O-240 delivers 30% more power than the O-200 while it weighs only 12% more. It may be mounted in tractor or pusher configuration.cite-ref-christy-3-0[3]cite-ref-shanaberger-4-0[4]

The O-240 was produced under license in the United Kingdom by Rolls-Royce Limited and was used to power the Reims-Cessna FRA150 Aerobat, a more powerful aerobatic model of the Cessna 150 constructed in France by Reims Aviation under license.cite-ref-5[5] Rolls-Royce acquired the rights to the O-240, but not the IO-240 in 1977.cite-ref-e11eu-2-1[2]

The fuel-injected IO-240-A and -B were introduced in 1993. The A and B versions differ only in the type of fuel injector used.cite-ref-e7so-1-1[1]cite-ref-shanaberger-4-1[4]

The IOF-240 is similar to the IO-240-B except that it employs an Aerosance FADEC system to control the ignition and fuel injection systems.cite-ref-e7so-1-2[1] The engine was not selected to power any production North American-manufactured aircraft until the Liberty XL2 entered production in 2006 powered by the IOF-240-B.

Dual ignition, 130 hp (97 kW) at 2800 rpm, dry weight 246 lb (112 kg) including starter and generator. Uses a Marvel-Schebler MA-3SPA IO 5067 carburetor. Certified 7 July 1971cite-ref-e11eu-2-2[2]cite-ref-christy-3-1[3]

Dual ignition, 125 hp (93 kW) at 2800 rpm, dry weight 246 lb (112 kg), uses a TCM 639231A27 fuel injectorcite-ref-e7so-1-3[1]

Dual ignition, 125 hp (93 kW) at 2800 rpm, dry weight 246 lb (112 kg), uses a TCM 639231A34 fuel injectorcite-ref-e7so-1-4[1]

Aerosance FADEC system controls the ignition and fuel injection systems, 125 hp (93 kW) at 2800 rpm, dry weight 255 lb (116 kg)cite-ref-e7so-1-5[1]

• AESL Airtourer T3

• Reims Cessna FRA150 Aerobat ("R" meaning a Rolls-Royce-built O-240)

• Rutan Voyager (front engine)

• Practavia Sprite

• Rollason Condor (D62C)

• St Croix Pietenpol Aerial

• Tri-R KIS TR-1

• Warner Revolution II

• American Homebuilts John Doe

• Diamond DA20-C1

• Eagle Aircraft 150B

• Rans S-16 Shekari

• Roko Aero NG4

• Issoire APM 40 Simba

• Liberty XL2

Data from TYPE CERTIFICATE DATA SHEET NO. E7SOcite-ref-e7so-1-6[1]

• Type: "4-cylinder, air-cooled, naturally aspirated, horizontally opposed, fuel-injected, spark ignition, four-stroke, direct drive. The engine incorporates a full authority digital electronic control (FADEC) system to control the ignition and fuel injection functions."

• Bore: 4.438 in (112.7 mm)

• Stroke: 3.875 in (98.4 mm)

• Displacement: 240 in3 (3.93 L)

• Dry weight: 255 lb (116 kg)

• Valvetrain: One intake and one exhaust valve per cylinder

• Fuel system: Aerosance FADEC system

• Fuel type: 100LL avgas

• Cooling system: Air-cooled

• Power output: 125 hp (93 kW) at 2,800 rpm

• Specific power: 0.52 hp/in3 (23.66 kW/L)

• Compression ratio: 8.5:1

• Power-to-weight ratio: 0.49 hp/lb (0.80 kW/kg)

• Lycoming IO-233

• List of aircraft engines

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Continental O-240

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cite-note-e7so-11. ↑ citereffederal-aviation-administration2007Federal Aviation Administration (March 2007). "TYPE CERTIFICATE DATA SHEET NO. E7SO Revision 4" (PDF). Archived from the original (PDF) on 2016-01-31. Retrieved 2008-12-18.

cite-note-e11eu-22. ↑ citereffederal-aviation-administration2007Federal Aviation Administration (March 2007). "TYPE CERTIFICATE DATA SHEET NO. E11EU Revision 4" (PDF). Retrieved 2008-12-27.

cite-note-christy-33. ↑ Christy, Joe: Engines for Homebuilt Aircraft & Ultralights, pages 58-59. TAB Books, 1983. ISBN 0-8306-2347-7

cite-note-shanaberger-44. ↑ citerefshanaberger2008Shanaberger, Kenneth (2008). "Continental O-240". Archived from the original on 2008-10-10. Retrieved 2008-12-18.

cite-note-55. ↑ Gunston 1989, p.42.

• Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9