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/C909. There are 7,500 engines in service.

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 and , were derived from the CFM56 engine family, 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 for the variant.

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

In a 2020 solicitation by the US Air Force called the B-52 Commercial Engine Replacement Program, GE had proposed updating the Boeing B-52 Stratofortress with CF34-10 engines. In September 2021, the Rolls-Royce F130 was selected instead of the GE proposal.

Applications

CF34-1A

• Bombardier Challenger 601-1A

CF34-3

CF34-3A

• Bombardier Challenger 601-3A/3R

• Bombardier CRJ100

CF34-3B

• Bombardier Challenger 604

• Bombardier Challenger 605

• Bombardier Challenger 650

• Bombardier Challenger 850

• Bombardier CRJ200

• Bombardier CRJ440

CF34-8

CF34-8C

• Bombardier CRJ550

• Bombardier CRJ700

• Bombardier CRJ705

• Bombardier CRJ900

• Bombardier CRJ1000

CF34-8E

• Embraer 170

• Embraer 175

CF34-10

CF34-10A

• Comac C909

CF34-10E

• Embraer 190

• Embraer 195

• Embraer Lineage 1000

Specifications

See also

References

External links

• General Electric CF34 page