CFM56 Turbine

Friday, October 1, 2010

The CFM56 is a turbofan aircraft turbine manufactured by CFM International (CFMI), which is a joint venture between GE Aviation of the United States and Snecma of France. The CFM56 has a thrust range of 18,500 to 34,000 pound-force (lbf) (80 to 150 kilonewtons (kN)). Also known by the US military designation F108, the CFM56 first ran in 1974. Since then more than 20,000 units have been built in five major variants: 1) CFM56-2 series, which is widely utilized in military applications (in the KC135 and the EC Mercury aircraft); 2) the CFM56-3, which was designed for Boeing 737-300/-400/-500 series aircraft; 3) the CFM56-4 series was a proposed improved version of the CFM56-2 designed for the Airbus A320 family of aircraft; 4) the CFM56-5 series, which was designed for the Airbus aircraft and has a very wide thrust rating of between 22,000 and 34,000 lbf (97.9 and 151 kN); 5) the CFM56-7 powers the Boeing 737 Next Generation series (737-600/-700/-800/-900).

Specifications of the CFM56-7 Turbofan Engine

Type: Twin-spool, high-bypass turbofan
Length: 98.7 in (2.5 m)
Diameter: 61 in (1.55 m) (fan)
Weight: 5,216 lb (2,366 kg) (dry)
Compressor: Single-stage fan, 3-stage low-pressure compressor, 9-stage high-pressure compressor
Combustors: one annular combustor
Turbine: Single-stage high-pressure turbine, 4-stage low-pressure turbine
Maximum thrust: 19,500 lbf (86.7 kN)
Overall pressure ratio: 32.8:1
Bypass ratio: 5.5:1
Thrust-to-weight ratio: 3.7:1

CFM56 Turbine Animation