CFM International CFM56

CFM International CFM56 is the designation of a series of aircraft engines. The United States Air Force are also referred to as F 108 These are turbofan engines with a bypass ratio of up to 6.5, which are produced by CFM International, a joint venture of General Electric / USA ( high-pressure part ) and SNECMA / France ( low-pressure part ).

In October 2009, the 20,000 was. Engine of the series delivered. The latest version CFM56- 7BE received on 30 July 2010 its approval and shall have a lower fuel consumption by 2%.

Use

The CFM56 was in the late 1970s for an extensive retrofitting of turbo-jet -powered aircraft such as the Douglas DC-8 Super 60 series and some military Boeing 707 variants, as well as many KC -135 used. With the introduction of the Boeing 737 Classic 1984 was exclusive drive for the entire model family. Likewise, the engine found in various Airbus aircraft use and is also the exclusive drive of the Airbus A340-200/300. The Airbus A320 family it competes with the V2500 International Aero Engines.

CFM engines are characterized by high durability and a relatively short length. The modular design is advantageous during assembly and disassembly.

Construction

The CFM56 is based on the high-pressure part of the General Electric F101 and designed by SNECMA low-pressure parts. The CFM56 engines have a nine -stage high- pressure compressor and a single stage high pressure turbine. The steps of the low-pressure area will vary from sample to sample.

  • CFM56 -3, CFM56 -5A and -7B have 4 levels.
  • CFM56- 5B and -5C have 5 levels.
  • CFM56- 3 has four stages
  • CFM56 -5A, -5B and -7B have 4 levels
  • CFM56 -5C has 5 levels.

The pass ratio of the engines is between 5.1 and 6.6:1, the total pressure ratio between 32.6 and 38,8:1.

Models

Fuel consumption

During the flight, the fuel consumption ( TSFC ) between 0.54 ( CFM56- 5C) and 0.65 ( CFM56 -3C) lb / lbf · h is

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