The Lycoming O-320 is a large family of 92 different naturally aspirated, air-cooled, four-cylinder, direct-drive engines commonly used on light aircraft such as the Cessna 172 and Piper Cherokee. Different variants are rated for 150 or 160 horsepower (112 or 119 kilowatts). As implied by the engine's name, its cylinders are arranged in horizontally opposed configuration and a displacement of 320 cubic inches (5.24 L).[1]
O-320 | |
---|---|
A Lycoming O-320-D2A installed in a Symphony SA-160 | |
Type | |
National origin | United States |
Manufacturer | Lycoming Engines |
Major applications | Cessna 172 Piper Cherokee Piper PA-18 Super Cub |
Produced | 1953- |
- 2Variants
- 4Specifications (O-320-A1A)
- 6References
Design and development[edit]
The O-320 family of engines includes the carbureted O-320, the fuel-injected IO-320, the inverted mount, fuel-injected AIO-320 and the aerobatic, fuel-injected AEIO-320 series. The LIO-320 is a 'left-handed' version with the crankshaft rotating in the opposite direction for use on twin-engined aircraft to eliminate the critical engine.[2][3]
The first O-320 (with no suffix) was FAAcertified on 28 July 1953 to CAR 13 effective 5 March 1952; this same engine was later re-designated, without change, as the O-320-A1A.[2] The first IO-320 was certified on 10 April 1961, with the AIO-320 following on 23 June 1969 and the first aerobatic AEIO-320 on 12 April 1974. The LIO-320s were both certified on 28 August 1969.[2][3]
The O-320 family of engines externally resembles the Lycoming O-235 and O-290 family from which they were derived. The O-320 shares the same 3.875 in (98 mm) stroke as the smaller engines, but produces more power with the bore increased to 5.125 in (130 mm). The design uses hydraulic tappets and incorporates the provisions for a hydraulically controlled propeller installation as well. The controllable-pitch propeller models use a different crankshaft from those intended for fixed-pitch propellers.[4]
The O-320 uses a conventional wet sump system for lubrication. The main bearings, connecting rods, camshaft bearings, tappets and pushrods are all pressure lubricated, while the piston pins, cylinder walls and gears are all lubricated by spray. The oil system is pressurized by an accessory-drive mounted oil pump. A remotely mounted oil cooler is used, connected to the engine by flexible hoses.[4]
The 150 hp (112 kW) versions of the carbureted O-320, are approved for the use of 87 AKI automotive gasoline. Only one model of the 160 hp (119 kW) variants of the 0-320 is not approved, and that is the H2AD model. All other 160 hp (119 kW) 0-320s are approved for 91 AKI. Airframe approval is also necessary to use automotive gasoline in any certified aircraft.[5]
The factory retail price of the O-320 varies by model. In 2010 the retail price of an O-320-B1A purchased outright was USD$47,076[6]
Variants[edit]
O-320 series[edit]
- O-320 (No suffix) later redesignated O-320-A1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Provisions for a controllable-pitch propeller and 25-degree spark advance.[2]
- O-320-A1B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A1A but with straight riser in oil sump and -32 carburetor.[4]
- O-320-A2A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A1A but with fixed-pitch propeller.[4]
- O-320-A2B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A2A but with straight riser in oil sump and -32 carburetor.[4]
- O-320-A2C
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A2B but with retard breaker magnetos.[4]
- O-320-A2D
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E3D but with conical mounts.[4]
- O-320-A3A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A1A but with 7/16' prop bolts.[4]
- O-320-A3B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A3A but with straight riser in oil sump and -32 carburetor.[4]
- O-320-A3C
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A3B but with retard breaker magnetos.[4]
- O-320-B1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as A1A but with high compression pistons.[4]
- O-320-B1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B1A but with straight riser in oil sump and -32 carburetor.[4]
- O-320-B2A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B1A but with fixed-pitch propeller provisions.[4]
- O-320-B2B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B2A but with straight riser in oil sump and -32 carburetor.[4]
An O-320-B2C mounted in a Robinson R22 helicopter
- O-320-B2C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B2B but with retard breaker magnetos.[4]
- O-320-B2D
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as D1D but with conical engine mounts and no propeller governor.[2]
- O-320-B2E
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as B2B except the carburetor is in the same location as the O-320-D models.[2]
- O-320-B3A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B1A but with 7/16 inch propeller bolts.[4]
- O-320-B3B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B1A but with 7/16 inch propellor bolts, a straight riser in oil sump, and -32 carburetor.[4]
- O-320-B3C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B3B but with retard breaker magnetos.[4]
- O-320-C1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B1A.[4]
- O-320-C1B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B1B.[4]
- O-320-C2A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B2A.[4]
- O-320-C2B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B2B.[4]
- O-320-C2C
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B2C.[4]
- O-320-C3A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B3A.[4]
- O-320-C3B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B3B.[4]
- O-320-C3C
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Low compression version converted through field conversion of B3C.[4]
- O-320-D1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as B3B but with Type 1 dynafocal mounts.[4]
- O-320-D1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as D1A but with retard breaker magnetos.[4]
- O-320-D1C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as D2C but with provisions for a controllable propeller,[4]
- O-320-D1D
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as the D1A but with Slick instead of Bendix magnetos and a horizontal carburetor and induction housing.[2] This model was used in the Gulfstream American GA-7 Cougar twin.
- O-320-D1F
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1F except with high compression pistons.[4]
A brand new Lycoming O-320-D2A engine with baffles already mounted
- O-320-D2A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as D1A but with fixed-pitch propeller provisions and 3/8 inch attaching bolts.[4] Used in the Symphony SA-160.
- O-320-D2B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as D2A but retard breaker magnetos.[4]
- O-320-D2C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100/130 or 91/96 avgas, compression ratio 8.50:1. Same as D2A except -1200 series magnetos.[4]
- O-320-D2F
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2F except with high compression pistons.[4]
- O-320-D2G
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as the D2A except with Slick instead of Bendix magnetos and 7/16 inch instead of 3/8 inch propeller flange bolts.[2]
- O-320-D2H
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as the D2G except with a O-320-B sump and intake pipes and with provisions for AC type fuel pump.[2]
- O-320-D2J
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1.Similar to the D2G but with two Slick impulse coupling magnetos and the propeller governor pad, fuel pump and governor pads on the accessory housing all not machined.[2] Used in the Cessna 172P.
- O-320-D3G
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 avgas, compression ratio 8.50:1. Same as the D2G but with 3/8 inch propeller attaching bolts.[2]
- O-320-E1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A3B but with Type 1 dynafocal mounts.[4]
- O-320-E1B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1A but with retard breaker magnetos.[4]
- O-320-E1C
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1B.[4]
- O-320-E1F
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1C but with propeller governor drive on the left front of the crankcase.[4]
- O-320-E1J
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as the E1F but with Slick magnetos.[2]
- O-320-E2A
- 150 hp (112 kW) at 2700 rpm, or 140 hp (104 kW) at 2450 rpm Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1A but with fixed-pitch propeller, 3/8 inch attaching bolts and an alternate power rating of 140 hp (104 kW).[4]
- O-320-E2B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2A but with retard breaker magnetos.[4]
- O-320-E2C
- 150 hp (112 kW) at 2700 rpm, or 140 hp (104 kW) at 2450 rpm Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2A but -1200 series mags and an alternate power rating of 140 hp (104 kW).[4]
- O-320-E2D
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Similar to E2A but with Slick magnetos and O-235 front.[4] Used in the Cessna 172 I to M models.
- O-320-E2F
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1F but with fixed pitch prop provisions.[4]
- O-320-E2G
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2D but with O-320-A sump and intake pipes.[4]
- O-320-E2H
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2D but with S4LN-20 and -21 magnetos.[4]
- O-320-E3D
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2D but with 3/8 inch propeller flange bolts.[4]
- O-320-E3H
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E3D but with S4LN-20 and -21 magnetos.[4]
- O-320-H1AD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Integral accessory section crankcase, front-mounted fuel pump external mounted oil pump and D4RN-2O21 impulse coupling dual magneto.[2]
- O-320-H1BD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Same as H1AD but with a D4RN-2200 retard breaker dual magneto.[2]
- O-320-H2AD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Same as H1AD but with provisions for a fixed-pitch propeller.[2] This was the troublesome engine that was installed on the 1977 to 1980 Cessna 172N Skyhawk.[7] It was notable from all other Lycoming models by incorporating hydraulic lifters that were barrel shaped instead of mushroom type, in an attempt to make the lifters possible to be serviced without having to disassemble the entire engine case, but the higher load on the cam lobes resulted in severe spalling. Multiple service bulletins and airworthiness directives have been issued regarding this specific model, and multiple modifications exist to attempt to mitigate its design defects.[8][9][10]
- O-320-H2BD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Same as the H2AD but with a D4RN-2200 retard breaker dual magneto.[2]
- O-320-H3AD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Same as the H2AD but with 3/8 inch propeller flange bolts, in place of instead of 7/16 inch.[2]
- O-320-H3BD
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 100LL avgas, compression ratio 9.00:1. Same as H3AD but with a D4RN-2200 retard breaker dual magneto.[2]
IO-320 series[edit]
- IO-320-A1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Base model with a Bendix RSA -5AD1 fuel injection system.[3]
- IO-320-A2A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A1A but with provisions for fixed-pitch propeller.[3]
- IO-320-B1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1A but with the fuel injector offset toward the engine's fore and aft centerline.[3]
- IO-320-B1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1A but with an AN fuel pump drive.[3]
- IO-320-B1C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the B1A but with an adapter for mounting the fuel injector straight to the rear.[3]
- IO-320-B1D
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the B1C but with S-1200 series high altitude magnetos.[3]
- IO-320-B1E
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the D1C except with a horizontal fuel injector.[3]
- IO-320-B2A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the BIA but with provision for a fixed-pitch propeller.[3]
- IO-320-C1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the B1B except it has features making it suitable for adding a turbo-supercharger via a Supplemental Type Certificate This engine has internal piston cooling oil nozzles.[3]
- IO-320-C1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the C1A but with a horizontal rear-mounted fuel injector.[3]
- IO-320-D1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the B1D but with Type 1 dynafocal mounts, S4LN-1227 and S4LN-1209 magnetos and the fuel injector mounted vertically under the oil sump.[3]
- IO-320-D1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the D1A but with the propeller governor drive on the left front of crankcase instead of on the accessory housing.[3]
- IO-320-D1C
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the D1B but with Slick Magnetos.[3]
- IO-320-E1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2A but with provision for a controllable-pitch propeller.[3]
- IO-320-E1B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E1A but with Slick 4050 and 4051 magnetos.[3]
- IO-320-E2A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as A2A but with Scintilla S4LN-20 and S4LN-21 magnetos, straight conical mounts, and the fuel injector mounted under the oil sump.[3]
- IO-320-E2B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as E2A but with Slick 4050 and 4051 magnetos.[3]
- IO-320-F1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the C1A except with a Type 1 (30°) dynafocal mount attachment instead of Type 2 (18°) mount attachment.[3]
LIO-320 series[edit]
- LIO-320-B1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as B1A except with counter-clockwise engine rotation and reverse rotation of accessories. It uses a modified starter ring gear, crankshaft, cam shaft, accessory housing and oil pump body. This engine is usually paired with an IO-320-B1A on a twin-engined aircraft.[3]
- LIO-320-C1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as C1A except with the same changes as the LIO-320-B1A. It has provisions for adding a turbo-supercharger. This engine is usually paired with an IO-320-C1A on a twin-engined aircraft.[3]
AIO-320 series[edit]
- AIO-320-A1A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the IO-320-B1D but this model permits installation and operation of the engine in the inverted position. The differences include a front-mounted propeller governor, two dry oil sumps, dual external oil scavenge pumps, an oil tank, three options for the position of the fuel injector and a Type 1 dynafocal mount.[3]
- AIO-320-A1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1A but with one impulse coupling magneto.[3]
- AIO-320-A2A
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1A but with provision for a fixed-pitch propeller.[3]
- AIO-320-A2B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1A but has one impulse coupling magneto and a fixed-pitch propeller.[3]
- AIO-320-B1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the A1B but with a front-mounted fuel injector.[3]
- AIO-320-C1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the B1B but with the fuel injector vertically mounted on bottom of the oil sump in the front position.[3]
AEIO-320 series[edit]
- AEIO-320-D1B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the IO-320-D1B but with an inverted oil system kit to allow aerobatic flight.[3]
- AEIO-320-D2B
- 160 hp (119 kW) at 2700 rpm, Minimum fuel grade 91/96 or 100LL avgas, compression ratio 8.50:1. Same as the AEIO-320-D1A but without provisions for a propeller governor.[3]
- AEIO-320-E1A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as the IO-320-E1A but with an inverted oil system kit to allow aerobatic flight.[3]
- AEIO-320-E1B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as the IO-320-E1B but with an inverted oil system kit to allow aerobatic flight.[3]
- AEIO-320-E2A
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as the IO-320-E2A but with an inverted oil system kit to allow aerobatic flight.[3]
- AEIO-320-E2B
- 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio 7.00:1. Same as the IO-320-E2B but with an inverted oil system kit to allow aerobatic flight.[3]
Applications[edit]
The Lycoming O-320 is a common engine used by amateur-builders in the Thorp T-18.
- Beagle Pup Series 2 and 3
Specifications (O-320-A1A)[edit]
Data from TYPE CERTIFICATE DATA SHEET NO. E-274 Revision 20[2]
General characteristics
- Type: Four-cylinder air-cooled horizontally opposed engine
- Bore: 5.125 in (130.18 mm)
- Stroke: 3.875 in (98.43 mm)
- Displacement: 319.8 cu in (5.24 l)
- Dry weight: 244 lb (111 kg)
Components
- Valvetrain: Two overhead valves per cylinder
- Fuel system:Updraft carburetor
- Fuel type: minimum grade of 80/87 avgas
- Oil system: Wet sump
- Cooling system: Air-cooled
Performance
- Power output: 150 hp (112 kW)
- Compression ratio: 7:1
- Power-to-weight ratio: .61 hp/lb (0.99 kW/kg)
See also[edit]
References[edit]
Notes[edit]
- ^Gunston 1989, p.98.
- ^ abcdefghijklmnopqrsFederal Aviation Administration (September 2005). 'TYPE CERTIFICATE DATA SHEET NO. E-274 Revision 20'. Retrieved 15 January 2009.
- ^ abcdefghijklmnopqrstuvwxyzaaabacadaeafagahFederal Aviation Administration (December 2003). 'TYPE CERTIFICATE DATA SHEET NO. 1E12 Revision 9'. Retrieved 16 January 2009.
- ^ abcdefghijklmnopqrstuvwxyzaaabacadaeafagahaiajakalamanaoapaqarasatauChristy, Joe: Engines for Homebuilt Aircraft & Ultralights, pages 77-80 TAB Books, 1983. ISBN0-8306-2347-7
- ^Petersen Aviation, Inc. 'Auto Fuel STC Approved Engines and Airframes'. www.autofuelstc.com. Retrieved 14 November 2017.
- ^Lycoming Engines (January 2010). '2010 Lycoming Service Engine Price List'(PDF). Retrieved 3 October 2010.
- ^Cessna Aircraft: Pilot Operating Handbook 1977 Skyhawk Cessna Model 172N, page 1-3. Cessna Aircraft, 1976.
- ^Lycoming Service Bulletins #424 (new lifter modification), #446C, #435C, #1406B ('T' case modification), Ney Nozzles modification
- ^'O320-H2AD'. Cessna Owner Organization. 23 February 2004. Archived from the original on 2 April 2015.
- ^McBride, Paul (5 March 2015). 'One engine, many questions'. General Aviation News.
Bibliography[edit]
- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN1-85260-163-9
External links[edit]
Wikimedia Commons has media related to Lycoming O-320. |
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Lycoming_O-320&oldid=902615840'
Supersedes Service Instruction No. 1324B
May 26, 2009
MODELS AFFECTED
All direct drive series engines.
TIME OF COMPLIANCE
At anytime the front crankshaft oil seal is replaced.
The two crankcase front bearing oil seals used in Lycoming direct drive engines are the split seal and the solid ring stretch seal. The split seal is open to permit assembly around the crankshaft. The solid seal is made from a highly elastic material that allows the seal to be stretched over the crankshaft propeller flange during assembly.
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O-235 | |
---|---|
A Lycoming O-235-C2C engine mounted in an American Aviation AA-1 Yankee light aircraft. | |
Type | |
National origin | United States |
Manufacturer | Lycoming Engines |
First run | 1941 |
Major applications | Cessna 152 Piper Tomahawk Beechcraft Skipper Grumman American AA-1 |
Produced | 1942âpresent |
Developed from | Lycoming O-233 |
Developed into | Lycoming IO-233 |
The Lycoming O-235 is a family of four-cylinder, air-cooled, horizontally opposed piston aircraft engines that produce 100 to 135 hp (75 to 101 kW), derived from the earlier O-233 engine.[1][2]
Well-known designs that use versions of the O-235 included the Cessna 152, Grumman American AA-1 series, Beechcraft Model 77 Skipper, Piper Tomahawk, American Champion Citabria, Piper Clipper, and the Piper PA-22-108 Colt.
- 4Specifications (O-235-C series)
Development[edit]
The engines are all carburetor-equipped, feature dual magneto ignition and have a displacement of 233 cubic inches (3.82 L). The first O-235 model was certified on 11 February 1942.[2]
The O-235 was developed into the lighter-weight Lycoming IO-233 engine for light sport aircraft.[3]
Lycoming 235 Front Seal Replacement
Variants[edit]
- O-235-C1
- Power 115 hp (86 kW) at 2800 rpm, dry weight 246 lb (112 kg) Provision for dual pump drives, tractor and pusher installation.[2]
- O-235-C1A
- Power 100 hp (75 kW) at 2450 rpm, dry weight 236 lb (107 kg) Similar to O-235-C1 except ignition timing, lower rpm and power. Optional 2 position or automatic propeller governor drive.[2]
- O-235-C1B
- Power 115 hp (86 kW) at 2800 rpm, dry weight 245 lb (111 kg) Similar to O-235-C1 except with retarded breaker magnetos.[2]
- O-235-C1C
- Power 108 hp (81 kW) at 2600 rpm, dry weight 243 lb (110 kg) Similar to O-235-C1 except with Slick magnetos.[2]
- O-235-C2A
- Power 115 hp (86 kW) at 2800 rpm, dry weight 246 lb (112 kg) Similar to O-235-C1 except with a type 1 propeller flange.[2]
- O-235-C2B
- Power 115 hp (86 kW) at 2800 rpm, dry weight 247 lb (112 kg) Similar to O-235-C2A but with two S-1200 series magnetos.[2]
- O-235-C2C
- Power 108 hp (81 kW) at 2600 rpm, alternate rated maximum continuous power rating of 100 hp at 2400 rpm, dry weight 244 lb (111 kg) Similar to O-235-C2B except with Slick magnetos and shielded ignition harness.[2]
- O-235-E1
- Power 115 hp (86 kW) at 2800 rpm, dry weight 250 lb (113 kg) 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.[2]
- O-235-E1B
- Power 115 hp (86 kW) at 2800 rpm, dry weight 249 lb (113 kg) Similar to O-235-E1 except for S4LN-200 series retarded breaker magnetos.[2]
- O-235-E2A
- Power 115 hp (86 kW) at 2800 rpm, dry weight 250 lb (113 kg) Similar to O-235-E1 except Type 1 propeller flange.[2]
- O-235-E2B
- Power 115 hp (86 kW) at 2800 rpm, dry weight 251 lb (114 kg) Similar to O-235-E2A except incorporates S-1200 series magnetos.[2]
- O-235-F1
- Power 125 hp (93 kW) at 2800 rpm, dry weight 250 lb (113 kg) Similar to O-235-C1 except compression ratio, fuel grade and rating.[2]
- O-235-F1B
- Power 125 hp (93 kW) at 2800 rpm, dry weight 249 lb (113 kg) Similar to O-235-F1 except retarded breaker magnetos.[2]
- O-235-F2A
- Power 125 hp (93 kW) at 2800 rpm, dry weight 250 lb (113 kg) Similar to O-235-F1 except a Type 1 propeller flange.[2]
- O-235-F2B
- Power 125 hp (93 kW) at 2800 rpm, dry weight 251 lb (114 kg) Similar to O-235-F2A but with S-1200 series magnetos.[2]
- O-235-G1
- Power 125 hp (93 kW) at 2800 rpm, dry weight 253 lb (115 kg) Similar to O-235-F1 except provisions for using constant speed propeller.[2]
- O-235-G1B
- Power 125 hp (93 kW) at 2800 rpm, dry weight 252 lb (114 kg) Similar to O-235-G1 except has retarded breaker magnetos.[2]
- O-235-G2A
- Power 125 hp (93 kW) at 2800 rpm, dry weight 253 lb (115 kg) Similar to O-235-G1 except a Type 1 propeller flange.[2]
- O-235-G2B
- Power 125 hp (93 kW) at 2800 rpm, dry weight 254 lb (115 kg) Similar to O-235-G2A except S-1200 series magnetos.[2]
- O-235-H2C
- Power 108 hp (81 kW) at 2600 rpm, alternate rated maximum continuous power rating of 100 hp at 2400 rpm, dry weight 243 lb (110 kg) Similar to O-235-C2C except Type 1 dynafocal mounting.[2]
- O-235-J2A
- Power 125 hp (93 kW) at 2800 rpm, dry weight 252 lb (114 kg) Similar to O-235-J2B except magnetos.[2]
- O-235-J2B
- Power 125 hp (93 kW) at 2800 rpm, dry weight 253 lb (115 kg) Similar to O-235-F2B except Type 1 dynafocal mounting.[2]
- O-235-K2A
- Power 118 hp (88 kW) at 2800 rpm, dry weight 252 lb (114 kg) Similar to O-235-F2A except ignition timing, lower power and reduced compression ratio.[2]
- O-235-K2B
- Power 118 hp (88 kW) at 2800 rpm, dry weight 253 lb (115 kg) Similar to O-235-F2B except ignition timing, lower power and reduced compression ratio.[2]
- O-235-K2C
- Power 115 hp (86 kW) at 2700 rpm, dry weight 248 lb (112 kg) Similar to O-235-K2A except Slick magnetos.[2]
- O-235-L2A
- Power 118 hp (88 kW) at 2800 rpm, alternate ratings of 115 hp (86 kW) at 2700 rpm, 112 hp (84 kW) at 2600 rpm, 110 hp (82 kW) at 2550 rpm and 105 hp (78 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-J2A except ignition timing, lower power and reduced compression ratio.[2]
- O-235-L2C
- Power 115 hp (86 kW) at 2700 rpm, alternate ratings of 115 hp (86 kW) at 2700 rpm, 112 hp (84 kW) at 2600 rpm, 110 hp (82 kW) at 2550 rpm and 105 hp (78 kW) at 2400 rpm, dry weight 249 lb (113 kg) Similar to O-235-L2A except Slick magnetos and lower maximum continuous rating.[2]
- O-235-M1
- Power 118 hp (88 kW) at 2800 rpm, alternate ratings of 115 hp (86 kW) at 2700 rpm, 112 hp (84 kW) at 2600 rpm, 110 hp (82 kW) at 2550 rpm and 105 hp (78 kW) at 2400 rpm, dry weight 255 lb (116 kg) Similar to -L2A except provision for controllable propeller and has AS-127 Type 2 propeller flange.[2]
- O-235-M2C
- Power 118 hp (88 kW) at 2800 rpm, alternate ratings of 115 hp (86 kW) at 2700 rpm, 112 hp (84 kW) at 2600 rpm, 110 hp (82 kW) at 2550 rpm and 105 hp (78 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-M1 except Slick 4200 series magnetos and Type 1 propeller flange.[2]
- O-235-M3C
- Power 118 hp (88 kW) at 2800 rpm, alternate ratings of 115 hp (86 kW) at 2700 rpm, 112 hp (84 kW) at 2600 rpm, 110 hp (82 kW) at 2550 rpm and 105 hp (78 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-M1 except Slick 4200 series magnetos.[2]
- O-235-N2A
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-L2A except reduced compression ratio and reduced power ratings.[2]
- O-235-N2C
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 249 lb (113 kg) Similar to O-235-L2C except reduced compression ratio and reduced power ratings.[2]
- O-235-P1
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 255 lb (116 kg) Similar to O-235-M1 except reduced compression ratio and reduced power ratings.[2]
- O-235-P2A
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 255 lb (116 kg) Similar to O-235-P1 except a Type 1 propeller flange.[2]
- O-235-P2C
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-M2 except reduced compression ratio and reduced power ratings.[2]
- O-235-P3C
- Power 116 hp (87 kW) at 2800 rpm, alternate ratings of 113 hp (84 kW) at 2700 rpm, 110 hp (82 kW) at 2600 rpm, 108 hp (81 kW) at 2550 rpm and 103 hp (77 kW) at 2400 rpm, dry weight 252 lb (114 kg) Similar to O-235-M3C except reduced compression ratio and reduced power ratings.[2]
Applications[edit]
Specifications (O-235-C series)[edit]
Data fromOperator's Manual, Textron Lycoming Aircraft Engines.[1]
General characteristics
- Type: 4-cylinder air-cooled horizontally opposed piston aircraft engine
- Bore: 4.375 inches (111.1 mm)
- Stroke: 3.875 inches (98.4 mm)
- Displacement: 233.3 in3 (3.823 L)
- Dry weight: 240.0 lb (108.9 kg)
Components
- Valvetrain:Pushrod-actuated valves
- Fuel system:Carburetor
- Fuel type:80/87 avgas
- Cooling system: Air-cooled
Performance
- Power output: 100 hp (75 kW)
- Specific power: 0.57 hp/in³ (26.0 kW/L)
- Compression ratio: 6.5:1
See also[edit]
Comparable engines
Related lists
References[edit]
- ^ abTextron 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.
- ^ abcdefghijklmnopqrstuvwxyzaaabacadaeafagahaiajakalFederal Aviation Administration (December 2003). 'TYPE CERTIFICATE DATA SHEET NO. E-223'(PDF). Retrieved 2008-11-30.
- ^Lycoming Engines (July 2008). 'Lycoming Engines Launches the IO-233-LSA'. Archived from the original on 2010-11-26. Retrieved 2009-04-03.
External links[edit]
Wikimedia Commons has media related to Lycoming O-235. |
- Lycoming 235 Series - Manufacturer's home page
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Lycoming_O-235&oldid=896028571'
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