General Electric CF34

Last updated
CF34
Canadair CL-600-2B19 Regional Jet CRJ-200LR, UTair Aviation AN2213397.jpg
A CF34 installed on a Bombardier CRJ200
Type Turbofan
National originUnited States
Manufacturer GE Aviation
First run1982 [1]
Major applications Bombardier CRJ
Comac ARJ21
Embraer E-Jets
Developed from General Electric TF34
Developed into General Electric Passport
CF34 engine mounted on an Embraer 190 E-190 az motore.JPG
CF34 engine mounted on an Embraer 190
Recent versions of the CF34 feature chevrons on the core nozzle outlet. KLC E-190 PH-EXA 25sep14 LFBO-3.jpg
Recent versions of the CF34 feature chevrons on the core nozzle outlet.

The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aviation from its TF34 military engine. The CF34 is used on a number of business and regional jets, including the Bombardier CRJ series, the Embraer E-Jets, and Comac ARJ21. [2] [3] In 2012, there were 5,600 engines in service.

Contents

Design and development

The original engine contained a single stage fan driven by a 4-stage low pressure (LP) turbine, supercharging a 14-stage high pressure (HP) compressor driven by a 2-stage 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,[ citation needed ] and have a radically different HP spool, containing 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.

On wing times can reach 14,000 hours, an overhaul costs over $1.5 million and a set of LLPs $2.1 million for a 25,000 cycle life. [4] In 1995, GE invested $200 million to develop the -8C derivative for the CRJ700. [5]

GE had proposed updating the Boeing B-52 Stratofortress with CF34-10 engines, [6] but the Rolls-Royce F130 was selected in September 2021 [7] instead.

Applications

CF34-1A
CF34-3A
CF34-3B
CF34-8C
CF34-8E
CF34-10A
CF34-10E

Specifications

CF34 Engine Comparison [8]
CF34-3 [9] CF34-8C [10] CF34-8E [11] CF34-10A [12] CF34-10E [13]
Application CL600/CRJ200 CRJ700/900/1000 E170/175 C909 E190/195
Length103  in (2.6  m )128 in (3.3 m)121 in (3.1 m)90 in (2.3 m)145 in (3.7 m)
Diameter49 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 weight1,670  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)
Fan44 in (110 cm)46.2 in (117 cm)53 in (130 cm)
Compressor 14 HP stages, 14:110 HP stages3 LP + 9 HP stages
Turbine 4 LP + 2 HP stages4 LP + 1 HP stage
Thrust (SL)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/weight 5.52:15.7-6:15.6:15.1:15.2:1
OPR (max. power)21:128-28.5:128.5:129:1
Bypass ratio 6.2:15:15.4:1
SFC (Cruise)0.69  lb / lbf / h
(20  g / kN / s )		0.67–0.68 lb/lbf/h
(19–19 g/kN/s)		0.68 lb/lbf/h
(19 g/kN/s)		0.65 lb/lbf/h
(18 g/kN/s)		0.64 lb/lbf/h
(18 g/kN/s)

See also

Related development

Comparable engines

Related lists

References

  1. ↑ GE Aviation at flightglobal.com
  2. ↑ The CF34 at aviationpros.com
  3. ↑ GE's CF34-3 Engines Celebrate 20 Years of Regional Jet Service at aviationpros.com
  4. ↑ "E190 Values Start to Take Note of E2". Aircraft Value News. October 29, 2018.
  5. ↑ David Hughes (Feb 13, 1995). "CF34-8C to power new regional jet". Aviation Week.
  6. ↑ "Propulsion Hub & Engine Product | GE Aviation". Archived from the original on June 26, 2020. Retrieved June 25, 2020.
  7. ↑ "Rolls-Royce North America selected to power the B-52 Commercial Engine Replacement Program" . Retrieved July 21, 2023.
  8. ↑ "The CF34 Engine". GE Aviation.
  9. ↑ "CF34-3 turbofan engine" (PDF). GE Aviation.
  10. ↑ "CF34-8C turbofan engine" (PDF). GE Aviation.
  11. ↑ "CF34-8E turbofan engine" (PDF). GE Aviation.
  12. ↑ "CF34-10A turbofan engine" (PDF). GE Aviation.
  13. ↑ "CF34-10E turbofan engine" (PDF). GE Aviation.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.