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 th ...

from its

TF34 The General Electric TF34 is an American military turbofan engine used on the A-10 Thunderbolt II and S-3 Viking. Design and development Developed by GE Aircraft Engines during the late 1960s, the original engine comprises a single stage fan, ...

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 Trade, buying and selling Product (business), products (such as goods and Service (economics), services). It is also "any activity or enterprise entered into for pr ...

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

LLP A limited liability partnership (LLP) is a partnership in which some or all partners (depending on the jurisdiction) have limited liabilities. It therefore can exhibit elements of partnerships and corporations. In an LLP, each partner is not ...

s $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 developmen ...

;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 * 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 E ...

* Embraer 195 *

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 comfo ...

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