Lycoming O-320
| Lycoming | |
|---|---|
 LycomingO-320-D2A in a Symphony Aircraft SA 160 |
|
| Lycoming O-320 | |
| Production period: | since 1953 |
| Manufacturer: | Lycoming |
| Working principle: | Otto |
| Motor design: | Boxer engine |
| Displacement: | 5240 cm 3 |
| Mixture preparation: | Manifold injection |
| Engine charging: | no |
| Power: | 119 kW |
| Dimensions: | 138 kg |
| Previous model: | none |
| Successor: | Lycoming O-340 |
Lycoming O-320 is the name of a piston aircraft engine from a family of engines made by the US manufacturer Lycoming . All are modular, air-cooled OHV 4-stroke boxer engines . The four cylinders each have a bore of 130.2 mm and a stroke of 98.4 mm. The cubic capacity is thus 5240 cm³, corresponding to 320 inch³, from which the name comes. The engine was first presented in 1953 and is still in production today (2011). The other engines of the manufacturer with the same cylinders in bore and stroke are the two-cylinder Lycoming O-160 and the six-cylinder Lycoming O-480 . Depending on the compression, 80/87, 91/96 or 100/130 octane fuel is required for their operation.
execution
The cylinder heads are made of aluminum and are shrunk and screwed onto the steel cylinders. The engine has one intake and one exhaust valve per cylinder . The exhaust valve heads are armored with stellite . The valve seats are shrunk into the cylinder heads. The pistons are made of an aluminum alloy and have two compression rings and an oil control ring. The forged steel connecting rods have copper-bronze bearings on the connecting rod base. The crankshaft, which is also forged, consists of a chrome-nickel-molybdenum steel alloy. After machining, all bearing surfaces are hardened by nitriding. The crankcase is a vertically divided light metal casting. The motor has a pressurized oil circulation lubrication system with a wet sump . There are versions with two single ignition magnets from Slick / Unison (now Champion) or with a double ignition magnet from Bendix (formerly Scintilla, now TCM) in the O-320 H "76 series" (built into the Cessna 172 N). A tachometer output , an electric starter and a generator or alternator are standard equipment .
In addition, an output for an additional fuel pump and a vacuum pump can be attached to the rear of the engine .
variants
- O-320: Original engine that was approved on July 28, 1953. It is still in production and guaranteed depending on the model between 140 and 160 hp at 2700 min -1 . It is very widespread and used in a large number of aircraft types.
- IO-320: Version with a multi-point fuel injection and a power from 112 to 119 kW (150 to 160 hp) at 2700 min -1 . Available as LIO-320 with reverse direction of rotation. Deliveries began in 1961. The engine is still in production today. For example, it was installed in the Piper PA-30
- AIO-320: Corresponds to the IO-320, but has a fuel system suitable for aerobatics and dry sump lubrication. It was produced between 1969 and 1977 and was used in the Bölkow Bo 209C , among others .
- AEIO-320: variant with 112 to 119 kW at 2700 min −1 , which has been in production since 1974. It also has a fuel system suitable for aerobatics, but the original wet sump lubrication has been retained. It is built into the American Champion 8KCAB and the Grob G 115 D-2 .
other producers
The engine is offered by Lycoming and other manufacturers such as America's Aircraft Engines or Teledyne Mattituck for general aviation even without approval.
Technical data (AIO-320-A1A)
- Bore: 130.2 mm
- Stroke: 98.4 mm
- Displacement: 5240 cm³
- Start and continuous power: 119 kW (160 hp) at 2700 min -1
- Compression: 8.5: 1
- Weight: 138 kg
- Length: 764 mm
- Width: 819 mm
- Height: 527 mm
swell
- FAA TCDS (PDF, 680 kB)
- Jane's all the world's aircraft 1971/72
Web links
The 320 series on the manufacturer's website accessed on January 29, 2015
