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 propulsion. The word "turbofan" is a portmanteau of "turbine" and "fan": the ''turbo'' portion refers to a gas turbine engine which achieves mechanic ...

developed by GE Aircraft Engines from its TF34 military engine. The CF34 is used on a number of business and

regional jet A regional jet (RJ) is a jet-powered regional airliner with fewer than 100 seats. The first one was the Sud-Aviation Caravelle in 1959, followed by the widespread Yakovlev Yak-40, Fokker F-28, and BAe 146. The 1990s saw the emergence of ...

s, including the

Bombardier CRJ The Bombardier CRJ or CRJ Series (for Canadair Regional Jet) is a family of regional jets introduced in 1991 by Bombardier Aerospace. The CRJ was formerly manufactured by Bombardier Aerospace with the manufacturing of the first CRJ generation, ...

series, the Embraer E-Jets, and

Comac , type = State-owned limited company , industry = Aviation , founded = , founder = , location_city = Pudong, Shanghai , location_country = China , area_served = Worldwide , products = Commercial airliners , services = , key_people ...

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 ...

. 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 The CFM International CFM56 (U.S. military designation F108) series is a Franco-American family of high-bypass turbofan aircraft engines made by CFM International (CFMI), with a thrust range of . CFMI is a 50–50 joint-owned company of Safran ...

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 Overhaul may refer to: *The process of overhauling, see ** Maintenance, repair, and overhaul **Refueling and overhaul (eg. nuclear-powered ships) **Time between overhaul * Overhaul (firefighting), the process of searching for hidden fire extensio ...

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 The Bombardier CRJ700, CRJ900, and CRJ1000 are a family of regional jet airliners that were designed and manufactured by Canadian transportation conglomerate Bombardier (formerly Canadair) between 1999 and 2020. Their design was derived from t ...

. GE has proposed updating the Boeing B-52 Stratofortress 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 developmen ...

* Bombardier Challenger 605 ;CF34-3B1 *

Bombardier Challenger 850 The Bombardier Challenger 800 is the largest super-midsize business jet that was built by Bombardier Aerospace. It is based on Bombardier's 50-seat Bombardier CRJ200 LR. The Challenger 850 is the updated version, produced from 2006 to now. Desig ...

* Bombardier CRJ200 ER/LR * Bombardier CRJ440 ER/LR ;CF34-8C1 * Bombardier CRJ700 (Series 701) ;CF34-8C5 * Bombardier CRJ700 (Series 705) *

Bombardier CRJ900 The Bombardier CRJ700, CRJ900, and CRJ1000 are a family of regional jet airliners that were designed and manufactured by Canadian transportation conglomerate Bombardier (formerly Canadair) between 1999 and 2020. Their design was derived from t ...

* Bombardier CRJ900 NextGen ;CF34-8C5A1 * Bombardier CRJ1000 NextGen ;CF34-8C5A2 * Bombardier CRJ1000 NextGen ;CF34-8C5B1 * Bombardier CRJ700 NextGen ;CF34-8E *

Embraer 170 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 ...

* Embraer 175 ;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 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 ...

Embraer Lineage 1000 The Embraer Lineage 1000 is a variant of the Embraer 190 regional jet airliner, launched as a private jet on May 2, 2006. Manufactured by the Brazilian aerospace firm Embraer, the Lineage is advertised as an "ultra-large" business jet with comf ...

Specifications

References

External links

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

Design and development

Applications

Specifications

See also

References

External links