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General Electric CF34


  GE-CF34

 

The General Electric CF34 is a civilian turbofan developed by GE Aircraft Engines from its TF34 military engine. First run in the 1960s, the original engines comprise a single stage fan, driven by a 4-stage LP turbine, supercharging a 14-stage 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. Later 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 18,500 lbf for the -10E variant.

 

Applications:

CF34-1
Bombardier CL-601-1A
Bombardier CL-601-1A/ER

CF34-3A
Bombardier CL-601-3A

CF34-3A1
Bombardier CRJ100 ER/LR

CF34-3A2

CF34-3B
Bombardier CL-604
Bombardier CL-605

CF34-3B1
Bombardier CRJ200 ER/LR
Bombardier CRJ440 ER/LR

CF34-8C1
Bombardier CRJ700 (Series 701)

CF34-8C5
Bombardier CRJ700 (Series 705)
Bombardier CRJ900
Bombardier CRJ900 NextGen

CF34-8C5A1
Bombardier CRJ1000 NextGen

CF34-8C5B1
Bombardier CRJ700 NextGen

CF34-8E
Embraer E-170
Embraer E-175

CF34-10A
Comac ARJ21

CF34-10E
Embraer E-190
Embraer E-195

 

Specifications:

CF34-3
Length: 103 in (2.6 m)
Diameter: 49 in (1.2 m)
Dry weight: 1,625 lb (737 kg) - 1,670 lb (760 kg)
Compressor: 1 fan / 14 HP stages
Turbine: 4 LP stages / 2 HP stages
Thrust at sea level: 9,220 lbf (41.0 kN)
Power-to-weight ratio: 5.6:1
Overall pressure ratio at max. power: 21:1
Bypass ratio: 6.2:1

CF34-8
Length: 121.2 in (3.08 m) - 128 in (3.3 m)
Diameter: 52 in (1.3 m) - 53.4 in (1.36 m)
Dry weight: 2,408 lb (1,092 kg) - 2,600 lb (1,200 kg)
Compressor: 1 fan / 10 HP stages
Turbine: 4 LP stages / 2 HP stages
Thrust at sea level: 13,790 lbf (61.3 kN) - 14,510 lbf (64.5 kN)
Power-to-weight ratio: 5.3:1
Overall pressure ratio at max. power: 28:1 - 28.5:1
Bypass ratio: 5:1

CF34-10
Length: 90 in (2.3 m) - 145.5 in (3.70 m)
Diameter: 57 in (1.4 m)
Dry weight: 3,700 lb (1,700 kg)
Compressor: 1 fan + 3 LP stages / 9 HP stages
Turbine: 4 LP stages / 1 HP stage
Thrust at sea level: 18,285 lbf (81.34 kN) - 20,000 lbf (89 kN)
Power-to-weight ratio: 5.2:1
Overall pressure ratio at max. power: 29:1
Bypass ratio: 5:1

 

 


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