Lycoming O-480
| Lycoming | |
|---|---|
 Lycoming GO-480 from Piaggio in a Dornier Do 27 |
|
| Lycoming O-480 | |
| Production period: | 1954-1988 |
| Manufacturer: | Lycoming |
| Working principle: | Otto |
| Motor design: | Six - cylinder boxer engine |
| Displacement: | 7861 cm 3 |
| Mixture preparation: | Manifold injection |
| Engine charging: | partly compressor |
| Power: | 194 - 235 kW |
| Dimensions: | 226 kg |
| Previous model: | none |
| Successor: | none |
Lycoming GO-480 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 six cylinders used here have a bore of 130.2 mm with a stroke of 98.4 mm. This results in a displacement of 7861 cm³, corresponding to 480 inch³, from which the designation is derived. The engine was first introduced in 1954 and remained in production until 1978. Other engines from the manufacturer with cylinders of the same dimensions are the two-cylinder Lycoming O-160 and the four-cylinder Lycoming O-320 . As the G (geared) in the designation shows, the propeller speed is reduced by a gear with i = 1.5625 or i = 1.55844. Depending on the compression, they were operated with either 80/87 or 91/96 octane fuel. All engines with a compressor and those designed from the outset for operation with 100/130 octane fuel had piston crown cooling using spray oil.
execution
The pistons are made of an aluminum alloy and each have two compression rings, one oil control ring and one oil distribution ring. The connecting rods have a double-T profile and are forged from steel. The crankshaft consists of a chrome-nickel-molybdenum steel alloy and is also manufactured using a forging process. After machining, all bearing surfaces are hardened by nitriding. The crankcase is a vertically divided light metal casting. A ball bearing in the front end shield absorbs the propeller thrust. All bearings except the piston pin bearings are lubricated by pressure oil. There is a sludge sleeve in the crankshaft that separates suspended matter by centrifugal action. The piston pins as well as the piston track and the auxiliary drive shaft are lubricated by centrifugal oil. The auxiliary device cover, made of light metal, is screwed to the rear of the engine and the oil sump. It contains the oil pump and the auxiliary drive shaft. The starter, generator, fuel pump, speed shaft and ignition magnets are attached to the cover.
variants
- GO-480: Original engine that was approved on April 21, 1954. It remained to 1978 in the manufacture and makes depending on the model 260 hp at 3000 min-1 and 285 horsepower at 3100 min -1 . It provided the impetus of aircraft such as Aero 520 / 560 and Beechcraft Model 50 . Both BMW in Germany and Piaggio in Italy acquired the reproduction rights and built the engine for use in the famous Dornier Do 27 and Piaggio P.149 aircraft .
- GSO-480: Supercharged version with the military designation O-480-1 . The engine delivers 320 horsepower at 3200 min -1 . The compressor has a gear ratio of 11.27: 1. It was manufactured between 1955 and 1959.
- IGSO-480: The first version of the engine with a single-point injection. It was given the military designation O-480-3. The output is 320 hp at 3200 rpm. Among other things, it was installed in the Dornier Do 28 D. Production ran between 1960 and 1978.
- IGO-480: variant with 280-285 hp at 3100 min -1 , which produced 1968 to 1978 and mainly in the Aero Commander 680 was used.
Technical data (IGSO-480-A1F6)
- Bore: 130.2 mm
- Stroke: 98.4 mm
- Displacement: 7859 cm³
- Continuous power: 264 hp at 3000 min -1 bis 3350 min -1
- Start Power: 274 hp at 3400 min -1
- Compression: 7.3: 1
- Maximum permissible cylinder head temperature: 246 ° C
- Maximum permissible cylinder liner temperature: 163 ° C
- Aviation fuel octane number: 80/87 new: 100LL
- Oil pan capacity: 11.25 l
- Minimum oil quantity: 2.5 l
- Minimum oil pressure (idle): 1.72 bar
- Oil pressure normal operation: 5.17 bar
- Ignition time: 25 ° before td.
- Firing order: 1–4–5–2–3–6
- Weight: 226 kg
- Length: 1208 mm
- Width: 842 mm
- Height: 570 mm
- Propeller reduction: i = 1.5625
swell
- Jane's all the world's aircraft 1971/72
