General Electric CF34
| CF34 | |
|---|---|
 |
|
| A CF34 installed on a Bombardier CRJ200 | |
| Type | Turbofan |
| National origin | United States |
| Manufacturer | General Electric |
| First run | 1982[1] |
| Major applications | Bombardier Challenger 601/604/605 Bombardier Challenger 850 Bombardier CRJ Comac ARJ21 Embraer E-Jets |
| Developed from | General Electric TF34 |
| Developed into | General Electric NG34[2] |
The General Electric CF34 is a civilian turbofan developed by GE Aircraft Engines from its TF34 military engine. The CF34 is used on a number of jet airliners, including the Bombardier CRJ series, the Embraer E-Jets, and the Chinese ARJ21 under development.[3][4] As of 2012, there are over 5,600 engines in service.
Contents
Design and development
The original engines comprise a single stage fan, driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage HP compressor, driven by a 2-stage high pressure (HP) turbine, with an annular combustor. Later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages. Latest variants, the -10A and -10E, were derived from the CFM56 engine family, and have a radically different HP spool, comprising a 9-stage compressor driven by a single stage turbine. The LP spool has 3 core booster stages behind the fan. Static thrust is 82 kilonewtons (18,500 lbf) for the -10E variant.
Applications
- CF34-1A
- CF34-3A
- CF34-3A1
- CF34-3A2
- CF34-3B
- CF34-3B1
- CF34-8C1
- CF34-8C5
- CF34-8C5A1
- CF34-8C5B1
- CF34-8E
- CF34-10A
- CF34-10E
Specifications
| CF34-1 | CF34-3 | CF34-8 | CF34-10 | |
|---|---|---|---|---|
| Length | 103 in (2.6 m) | 121.2 in (3.08 m) - 128 in (3.3 m) | 90 in (2.3 m) - 145.5 in (3.70 m) | |
| Diameter | 49 in (1.2 m) | 52 in (1.3 m) - 53.4 in (1.36 m) | 57 in (1.4 m) | |
| Dry weight | 1,625 lb (737 kg) - 1,670 lb (760 kg) | 2,408 lb (1,092 kg) - 2,600 lb (1,200 kg) | 3,700 lb (1,700 kg) | |
| Compressor | 1 fan 14 HP stages |
1 fan 10 HP stages |
1 fan + 3 LP stages 9 HP stages |
|
| Turbine | 4 LP stages 2 HP stages |
4 LP stages 2 HP stages |
4 LP stages 1 HP stage |
|
| Thrust at sea level |
9,220 lbf (41.0 kN) | 13,790 lbf (61.3 kN) - 14,510 lbf (64.5 kN) | 18,285 lbf (81.34 kN) - 20,000 lbf (89 kN) | |
| Thrust-to-weight ratio |
5.6:1 | 5.3:1 | 5.2:1 | |
| Overall pressure ratio at max. power |
21:1 | 28:1 - 28.5:1 | 29:1 | |
| Bypass ratio | 6.2:1 | 5:1 | 5:1 |
See also
- Related development
- Comparable engines
- Related lists
References
- ↑ GE Aviation at flightglobal.com
- ↑ Technology Development Continues for Next-Generation Turbofan and Turboprop Engines at geaviation.com
- ↑ The CF34 at aviationpros.com
- ↑ GE's CF34-3 Engines Celebrate 20 Years of Regional Jet Service at aviationpros.com
External links
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