The Lycoming O-235 is a family of four-cylinder, air-cooled, horizontally opposed piston aircraft engines that produce , derived from the earlier O-233 engine.Textron Lycoming: ''Operator's Manual, Textron Lycoming Aircraft Engines, Series O-235 & O-290'', 4th Edition January 1988, Pages 2-1 & 2-4, Stock # 60297-9, Textron Lycoming. Well-known designs that use versions of the O-235 included the Cessna 152,

Grumman American AA-1 The Grumman American AA-1 series is a family of light, two-seat aircraft. The family includes the original American Aviation AA-1 Yankee and AA-1A Trainer, the Grumman American AA-1B Trainer and TR-2, plus the Gulfstream American AA-1C ...

series, Beechcraft Model 77 Skipper,

Piper PA-38 Tomahawk The Piper PA-38-112 Tomahawk is a two-seat, fixed tricycle gear general aviation airplane, originally designed for flight training, touring and personal use. Design and development The Tomahawk is a single-engined low-wing cantilever monoplane ...

, American Champion Citabria, Piper Clipper, and the Piper PA-22-108 Colt.

Development

The engines are all

carburetor A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main meteri ...

-equipped, feature dual magneto ignition and have a displacement of 233 cubic inches (3.82 L). The first O-235 model was

certified Certification is the provision by an independent body of written assurance (a certificate) that the product, service or system in question meets specific requirements. It is the formal attestation or confirmation of certain characteristics of a ...

on 11 February 1942. The O-235 was developed into the lighter-weight

Lycoming IO-233 The Lycoming IO-233 is a non-certified four-cylinder, air-cooled, horizontally opposed piston aircraft engine that produces between and . The IO-233 is a development of the Lycoming O-235, which is itself a derivative of the older Lycoming O- ...

engine for light sport aircraft.

Variants

;O-235-C1 :Power at 2800 rpm, dry weight Provision for dual pump drives, tractor and pusher installation. ;O-235-C1A :Power at 2450 rpm, dry weight Similar to O-235-C1 except ignition timing, lower rpm and power. Optional 2 position or automatic propeller governor drive. ;O-235-C1B :Power at 2800 rpm, dry weight Similar to O-235-C1 except with retarded breaker magnetos. ;O-235-C1C :Power at 2600 rpm, dry weight Similar to O-235-C1 except with Slick magnetos. ;O-235-C2A :Power at 2800 rpm, dry weight Similar to O-235-C1 except with a type 1 propeller flange. ;O-235-C2B :Power at 2800 rpm, dry weight Similar to O-235-C2A but with two S-1200 series magnetos. ;O-235-C2C :Power at 2600 rpm, alternate rated maximum continuous power rating of 100 hp at 2400 rpm, dry weight Similar to O-235-C2B except with Slick magnetos and shielded ignition harness. ;O-235-E1 :Power at 2800 rpm, dry weight Similar to O-235-C1 except crankcase and crankshaft supply pressurized oil to a constant speed propeller. Accessory case changed to accommodate a standard propeller governor drive. ;O-235-E1B :Power at 2800 rpm, dry weight Similar to O-235-E1 except for S4LN-200 series retarded breaker magnetos. ;O-235-E2A :Power at 2800 rpm, dry weight Similar to O-235-E1 except Type 1 propeller flange. ;O-235-E2B :Power at 2800 rpm, dry weight Similar to O-235-E2A except incorporates S-1200 series magnetos. ;O-235-F1 :Power at 2800 rpm, dry weight Similar to O-235-C1 except compression ratio, fuel grade and rating. ;O-235-F1B :Power at 2800 rpm, dry weight Similar to O-235-F1 except retarded breaker magnetos. ;O-235-F2A :Power at 2800 rpm, dry weight Similar to O-235-F1 except a Type 1 propeller flange. ;O-235-F2B :Power at 2800 rpm, dry weight Similar to O-235-F2A but with S-1200 series magnetos. ;O-235-G1 :Power at 2800 rpm, dry weight Similar to O-235-F1 except provisions for using constant speed propeller. ;O-235-G1B :Power at 2800 rpm, dry weight Similar to O-235-G1 except has retarded breaker magnetos. ;O-235-G2A :Power at 2800 rpm, dry weight Similar to O-235-G1 except a Type 1 propeller flange. ;O-235-G2B :Power at 2800 rpm, dry weight Similar to O-235-G2A except S-1200 series magnetos. ;O-235-H2C :Power at 2600 rpm, alternate rated maximum continuous power rating of 100 hp at 2400 rpm, dry weight Similar to O-235-C2C except Type 1 dynafocal mounting. ;O-235-J2A :Power at 2800 rpm, dry weight Similar to O-235-J2B except magnetos. ;O-235-J2B :Power at 2800 rpm, dry weight Similar to O-235-F2B except Type 1 dynafocal mounting. ;O-235-K2A :Power at 2800 rpm, dry weight Similar to O-235-F2A except ignition timing, lower power and reduced compression ratio. ;O-235-K2B :Power at 2800 rpm, dry weight Similar to O-235-F2B except ignition timing, lower power and reduced compression ratio. ;O-235-K2C :Power at 2700 rpm, dry weight Similar to O-235-K2A except Slick magnetos. ;O-235-L2A :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-J2A except ignition timing, lower power and reduced compression ratio. ;O-235-L2C :Power at 2700 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-L2A except Slick magnetos and lower maximum continuous rating. ;O-235-M1 :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to -L2A except provision for controllable propeller and has AS-127 Type 2 propeller flange. ;O-235-M2C :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-M1 except Slick 4200 series magnetos and Type 1 propeller flange. ;O-235-M3C :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-M1 except Slick 4200 series magnetos. ;O-235-N2A :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-L2A except reduced compression ratio and reduced power ratings. ;O-235-N2C :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-L2C except reduced compression ratio and reduced power ratings. ;O-235-P1 :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-M1 except reduced compression ratio and reduced power ratings. ;O-235-P2A :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-P1 except a Type 1 propeller flange. ;O-235-P2C :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-M2 except reduced compression ratio and reduced power ratings. ;O-235-P3C :Power at 2800 rpm, alternate ratings of at 2700 rpm, at 2600 rpm, at 2550 rpm and at 2400 rpm, dry weight Similar to O-235-M3C except reduced compression ratio and reduced power ratings.

Applications

Specifications (O-235-C2C)

References

External links