General Electric TF34/CF34

The General Electric TF34 is a military turbofan engine used on the A-10 Thunderbolt and S-3 Viking. Developed by GE Aircraft Engines during the late 1960s, the original engine comprises a single stage fan, driven by a 4-stage LP turbine, supercharging a 14-stage HP compressor, driven by a 2-stage HP turbine. An annular combustor is featured. The TF34-GE-400A is rated at 41.26KN (9275lbf) static thrust.

The civilian variant, the CF34, is used on a number of jet airliners, including the Bombardier CRJ series, the 'E-Jets' from Embraer and the Chinese ARJ21 under development. Originally based on the TF34, later higher thrust versions of the CF34 feature an advanced technology core, with only 10 HP compressor stages. Latest 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 18500lbf (i.e. -10E)

Incidents

On January 25, 2007, a Mesa Airlines CRJ-200LR with registration N17337 and operating as US Airways Express (in America West Express colors) flight 2985 from Denver International Airport to Phoenix Sky Harbor International Airport experienced an uncontained failure of its port engine approximate 50 nm (100 km) from Denver.Fact|date=April 2008 The flight crew declared an emergency and were able to return to Denver without injury to passengers or crew. The incident is the first of its kind for the General Electric CF34-3B1 engine used on the CRJ.Fact|date=April 2008

Specifications

jetspecs

type=axial flow, twin-shaft, bypass turbofan engine
length=
diameter=
weight=
compressor=
combustion=
turbine=
fueltype=
oilsystem=
power=
thrust=
compression=
aircon=
turbinetemp=
fuelcon=
specfuelcon=
power/weight=
thrust/weight=

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) note:retired;CF34-8C5
* Bombardier CRJ700 (Series 705) note: 8C5 is downrated @ the 700er series
* Bombardier CRJ900;CF34-8C5A1
* Bombardier CRJ1000;CF34-8E
* Embraer E-170
* Embraer E-175;CF34-10A
* ACAC ARJ21;CF34-10E
* Embraer E-190
* Embraer E-195

Comparable engines

*Rolls-Royce BR700
*Rolls-Royce Tay (turbofan)
*Pratt & Whitney PW6000
*Motor Sich D-436
*ZMKB Ivchenko Lotarev Progress D436

External links

* General Electric pages on the [http://www.geae.com/engines/military/tf34/ TF34] and the [http://www.geae.com/engines/commercial/cf34/ CF34]