General Electric TF34
TF34 and CF34 is the name given to a series of turbofan - engines of the US company General Electric .
variants
The TF34 is the military variant used on the Thunderbolt A-10 and the S-3 Viking . It was developed by General Electric's engine division during the late 1960s. The original powerplant included a single stage fan driven by a four stage low pressure turbine, a 14 stage high pressure compressor driven by a two stage high pressure turbine, and an annular combustion chamber. The TF34-GE-400A is approved for a thrust of 41.26 kN.
The civilian version CF34 ( 'Commercial Fan') at various commercial aircraft, including Bombardier's CRJ series, the E-Jets from Embraer and China's Comac ARJ21 used. Originally the CF34 is based on the TF34. It was first used in 1983 as the CF34-3A on the Challenger 601 Corporate Jet . Later versions of the CF34 with higher thrust have a new core with only a ten-stage high-pressure compressor. This CF34-8C1 was approved by the FAA in November 1999 and was used in the CRJ700 from 2001. The latest variants, the -10A and -10E, were derived from the CFM56 family, have a fundamentally modified high-pressure system and contain a nine-stage compressor that is driven by a single-stage turbine. The low-pressure system has an additional three booster stages behind the fan. These variants are approved for a thrust of up to 88.9 kN.
More than 6,000 CF34s are in service worldwide, 4,300 of which are on regional jets . With the technology programs NG34 and TechX, GE is currently working on a successor model that will save around 20% fuel and will have its first run in 2012.
Technical specifications
Type | Thrust (kN) | By- pass ratio at start |
Total pressure ratio |
Blower diameter (m) |
Length (m) | Dry matter (kg) |
Admission | Use at |
---|---|---|---|---|---|---|---|---|
CF34-3B | 41 | 6.2: 1 | 21.1: 1 | 1.118 | 2.616 | 758 | 1995 | CRJ200 / Challenger 604 / Challenger 850 |
CF34-8C5 | 61.3-64.5 | 5: 1 | ~ 28: 1 | 1.174 | 3.264 | 1125 | 2002 | CRJ 701/900/1000 |
CF34-8E | 64.5 | 5: 1 | ~ 28: 1 | 1.174 | 3.078 | 1179 | 2002 | Embraer 170/175 |
CF34-10A | 81.2-88.9 | 5.4: 1 | 29: 1 | 1.346 | 3,696 | 1676 | - | ARJ21 |
CF34-10E | 81.3 | 5.4: 1 | 29: 1 | 1.346 | 3,696 | 1676 | 2005 | Embraer 190/195 |
Web links
Individual evidence
- ↑ FlugRevue October 2009, p. 95, The next best seller - GE Aviation is working on the CF34 successor