The General Electric CF34 is a civilian high-bypass

turbofan The turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft engine, aircraft propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which ac ...

developed by

GE Aircraft Engines GE Aviation, a subsidiary of General Electric, is headquartered in Evendale, Ohio, outside Cincinnati. GE Aviation is among the top aircraft engine suppliers, and offers engines for the majority of commercial aircraft. GE Aviation is part of the ...

from its TF34 military engine. The CF34 is used on a number of

business Business is the practice of making one's living or making money by producing or buying and selling products (such as goods and services). It is also "any activity or enterprise entered into for profit." Having a business name does not separ ...

and regional jets, including the Bombardier CRJ series, the

Embraer E-Jets The Embraer E-Jet family is a series of four-abreast narrow-body short- to medium-range twin-engine jet airliners designed and produced by the Brazilian aerospace manufacturer Embraer. The E-Jet was designed as a complement to the preceding E ...

, and Comac ARJ21. In 2012, there were 5,600 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 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 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 LLPs $2.1 million for a 25,000 cycle life. In 1995, GE invested $200 million to develop the -8C derivative for the CRJ700. GE has proposed updating the

Boeing B-52 Stratofortress The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It has been operated by the United States Air ...

with CF34-10 engines.

Applications

;CF34-1A * Bombardier Challenger 601-1A ;CF34-3A * Bombardier Challenger 601-3A ;CF34-3A1 * Bombardier Challenger 601-3R * Bombardier CRJ100 ER/LR ;CF34-3A2 * Bombardier Challenger 601-3A/ER ;CF34-3B *

Bombardier Challenger 604 The Bombardier Challenger 600 series is a family of business jets developed by Canadair after a Bill Lear concept, and then produced from 1986 by its new owner, Bombardier Aerospace. At the end of 1975, Canadair began funding the development ...

Bombardier Challenger 605 The Bombardier Challenger 600 series is a family of business jets developed by Canadair after a Bill Lear concept, and then produced from 1986 by its new owner, Bombardier Aerospace. At the end of 1975, Canadair began funding the development ...

;CF34-3B1 *

Bombardier Challenger 850 The Bombardier Challenger 800 is the largest super-midsize business jet that was built by Bombardier Aerospace Bombardier Aviation is a division of Bombardier Inc. It is headquartered in Dorval, Quebec, Canada. Its most popular aircraft incl ...

* 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 ;CF34-8C5A2 * Bombardier CRJ1000 NextGen ;CF34-8C5B1 * Bombardier CRJ700 NextGen ;CF34-8E * Embraer 170 *

Embraer 175 The Embraer E-Jet family is a series of four-abreast narrow-body short- to medium-range twin-engine jet airliners designed and produced by the Brazilian aerospace manufacturer Embraer. The E-Jet was designed as a complement to the preceding ...

;CF34-10A *

Comac ARJ21 The Comac ARJ21 Xiangfeng () is a 78–90 seat regional jet manufactured by the Chinese state-owned aerospace company Comac. Development of the ARJ21 (Advanced Regional Jet) began in March 2002, the first prototype was rolled out on 21 Decem ...

;CF34-10E *

Embraer 190 The Embraer E-Jet family is a series of four-abreast narrow-body short- to medium-range twin-engine jet airliners designed and produced by the Brazilian aerospace manufacturer Embraer. The E-Jet was designed as a complement to the preceding ...

* Embraer 195 * Embraer Lineage 1000

Specifications

References

External links

General Electric CF34 page
{{DEFAULTSORT:General Electric Cf34 High-bypass turbofan engines

CF34 The General Electric CF34 is a civilian high-bypass turbofan developed by GE Aircraft Engines 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 ...

Design and development

Applications

Specifications

See also

References

External links