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 |
| Unit cost | CF34-8C5: $4 million (2012) [2] CF34-10E: $7.3 Million (2012) [3] |
| Developed from | General Electric TF34 |
| Developed into | General Electric NG34[4] |
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.[5][6] As of 2012, there are over 5,600 engines in service.
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
| CF34-3[8] | CF34-8C[9] | CF34-8E[10] | CF34-10A[11] | CF34-10E[12] | |
|---|---|---|---|---|---|
| Application | CL600/CL850 CRJ200 |
Bombardier CRJ700/900/1000 | E-170/175 | Comac ARJ21 | E-190/195 Lineage 1000 |
| Length | 103 in (2.6 m) | 128 in (3.3 m) | 121 in (3.1 m) | 90 in (2.3 m) | 145 in (3.7 m) |
| Diameter | 49 in (1.2 m) | 52 in (1.3 m) | 53 in (1.3 m) | 57 in (1.4 m) | 57 in (1.4 m) |
| Dry weight | 1,670 lb (760 kg) | 2,400–2,450 lb (1,090–1,110 kg) | 2,600 lb (1,200 kg) | 3,700 lb (1,700 kg) | 3,700 lb (1,700 kg) |
| Compressor | 1 44 in fan 14 HP stages, 14:1 |
1 46.2 in fan 10 HP stages |
1 53 in fan + 3 LP stages 9 HP stages | ||
| Turbine | 4 LP stages 2 HP stages |
4 LP stages 1 HP stage | |||
| Thrust at sea level |
9,220 lbf (41.0 kN) | 13,790–14,500 lbf (61.3–64.5 kN) | 14,500 lbf (64 kN) | 17,640 lbf (78.5 kN) | 20,360 lbf (90.6 kN) |
| Thrust-to-weight ratio |
5.52:1 | 5.7-6:1 | 5.6:1 | 5.1:1 | 5.2:1 |
| Overall pressure ratio at max. power |
21:1 | 28-28.5:1 | 28.5:1 | 29:1 | |
| Bypass ratio | 6.2:1 | 5:1 | 5:1 | 5.4:1 | |
| Cruise SFC | .69 lb/lbf/h (20 g/kN/s) | .67–.68 lb/lbf/h (19–19 g/kN/s) | .68 lb/lbf/h (19 g/kN/s) | .65 lb/lbf/h (18 g/kN/s) | .64 lb/lbf/h (18 g/kN/s) |
See also
- Related development
- Comparable engines
- PowerJet SaM146
- Progress D-436
- Pratt & Whitney PW6000
- Rolls-Royce AE 3007
- Rolls-Royce BR700
- Rolls-Royce RB.183 Tay
- Related lists
References
- ↑ GE Aviation at flightglobal.com
- ↑ http://www.geaviation.com/press/cf34/cf34_20121206.html
- ↑ http://www.geaviation.com/press/cf34/cf34_20110620.html
- ↑ 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
- ↑ "The CF34 Engine". GE Aviation.
- ↑ "CF34-3 turbofan engine" (PDF). GE Aviation.
- ↑ "CF34-8C turbofan engine" (PDF). GE Aviation.
- ↑ "CF34-8E turbofan engine" (PDF). GE Aviation.
- ↑ "CF34-10A turbofan engine" (PDF). GE Aviation.
- ↑ "CF34-10E turbofan engine" (PDF). GE Aviation.
External links
 |
Wikimedia Commons has media related to General Electric CF34. |