Lycoming O-340
| Lycoming | |
|---|---|
| Image does not exist |
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| O-340 | |
| Production period: | 1954-1957 |
| Manufacturer: | Lycoming |
| Developing country: |
 United States
|
| First run: | 1953 |
| Working principle: | Otto |
| Motor design: | boxer |
| Cylinder: | 4th |
| Drilling: | 130 mm |
| Hub: | 105 mm |
| Displacement: | 5580 cm 3 |
| Compression: | 8.5: 1 |
| Mixture preparation: | Carburetor |
| Engine charging: | no |
| Cooling system: | Air cooling |
| Power: | 119 - 127 kW |
| Dimensions: | 112-113 kg |
| Previous model: | Lycoming O-320 |
| Successor: | Lycoming O-360 |
Lycoming O-340 is a series of four-cylinder boxer engines with carburettors for mixture preparation , which was built by the US manufacturer Lycoming during the mid-1950s.
development and construction
The O-340 was specially developed for the Temco D-16 . Jack Riley, the designer of the Temco D-16, wanted an improved version of the Lycoming O-320 with higher performance to give the aircraft a higher service ceiling in the event of an engine failure . Since the Lycoming O-360 was still at the beginning of several years of development, Lycoming modified the O-320. The engine got longer cylinders , a crankcase with a longer stroke to increase the displacement and redesigned connecting rods . These changes resulted in a higher compression of 8.5: 1 and increased the rated power from the 150 hp (110 kW ) of the O-320 to 170 hp (125 kW). The engine was later used in many aircraft and helicopters and also in kit aircraft.
The O-340 series covers a power range from 160 HP (118 kW) to 170 HP (125 kW). All models have a displacement of 5580 cm³ and air-cooled cylinder heads .
The first engine in the series received its type certification on July 20, 1954. All models are certified for both tractor and pusher configurations .
Variants
- O-340-A1A
- 170 hp (125 kW) at 2700 min -1 , dry weight of 250 lb (113 kg ), carburetor Marvel Schebler MA-4-5, magnetos scintillation S4LN-20 and -21, AvGas with at least 91/96 octane , Type Certificate on 13 January 1955
- O-340-A2A
- Identical in construction to the A1A, but without regulation for a controllable pitch propeller , type approval on November 16, 1956
- O-340-B1A
- At 2.700 min 160 hp (118 kW) -1 , dry weight of 247 lb (112 kg), identical to the A1A, but with reduced compression of 7.15: 1 and less power to be operated with AvGas with 80/87 octane to Can, type certification on July 20, 1954 as O-340, designation changed to O-340-B1A on September 27, 1956
Applications
- Brantly B-2 and B-2A
- Cessna 170 (with supplementary type certification )
- Oakland Super V
- Piper Apache (with supplementary type certification)
- Temco D-16
Web links
Individual evidence
- ↑ a b c d e f TYPE CERTIFICATE DATA SHEET NO. E-277, Revision 5. (pdf) Federal Aviation Administration , April 15, 1963, accessed February 9, 2020 .
