CFM56-5BTurbofan Engine
22,000 - 33,000 POUNDS THRUST
The CFM56-5B is the engine of choice for the A320 family, having been selected to power nearly 60 percent of the A318/A319/A320/A321 aircraft ordered. One of the primary factors behind the CFM56-5B's broad-based market acceptance has been its simple, rugged architecture, which gives it the highest reliability, durability and repairability in its class.
How does a CFM56-5B work?
An inside look at the engine of choice for the Airbus A320 family.
Tech Insertion
Introduced as the new production configuration in 2007, learn how CFM56 Tech Insertion is helping operators keep costs low.
PROVEN
The CFM56-5B, a high-performance, low-risk derivative engine of the CFM56 family, was originally developed to power the Airbus A321. Today, it is the only engine that can power every model of the A320 family with one bill of materials. More than 5,000 CFM56-5B engines have been delivered and this fleet has accumulated more than 80 million flight hours.
BREAKTHROUGH
The CFM56-5B was the first engine to introduce advanced double annular combustor (DAC) technology in the mid-1990s. This technology reduced NOx (oxides of nitrogen) emissions by as much as 45 percent.
CFM keeps investing in technology enhancements that make the CFM56-5B even better. In October 2007, Tech Insertion became the production configuration for all CFM56-5B engines. Tech Insertion provides operators with significant improvements in fuel consumption, emissions levels, and maintenance costs.
Most recently, as of November 2011, all deliveries are in CFM56-5B/3 PIP configuration. This new production standard provides 0.5% improved fuel efficiency and 1% lower maintenance cost.
QUICK FACTS
- Highest fan pressure ratio in the CFM56 family
- Improved engine control unit (ECU) and control processing unit (CPU)
- First use of ultra-low-emissions combustor in commercial service
APPLICATIONS
Airbus A318,A319
Airbus A320
Airbus A321
THE TECHNOLOGY BEHIND THE CFM56-5B TURBOFAN ENGINE
|
Engine Model
|
5B1 | 5B2 | 5B3 | 5B4 | 5B5 | 5B6 | 5B7 | 5B8 | 5B9 |
| Takeoff Conditions (sea level) | |||||||||
| Max. takeoff (lb) | 30,000 | 31,000 | 33,000 | 27,000 | 22,000 | 23,500 | 27,000 | 21,600 | 23,300 |
| Airflow (lb/sec) | 943 | 956 | 968 | 897 | 818 | 844 | 897 | 811 | 841 |
| Bypass ratio | 5.5 | 5.5 | 5.4 | 5.7 | 6.0 | 5.9 | 5.7 | 6.0 | 5.9 |
| In-Flight Performance (installed) (35,000 ft - Mach - 0.80 ISA) | |||||||||
| Max climb thrust (lb) | 6,420 | 6,420 | 6,420 | 5,630 | 5,630 | 5,630 | 6,420 | 5,630 | 5,630 |
| Overall pressure ratio at max. climb |
35.4 | 35.4 | 35.5 | 32.6 | 32.6 | 32.6 | 35.5 | 32.6 | 32.6 |
| Max. cruise thrust (lb) | 5,840 | 5,840 | 5,840 | 5,020 | 5,020 | 5,020 | 5,840 | 5,020 | 5,020 |
| Engine Characteristics | |||||||||
| Length (in) | 102.4 | 102.4 | 102.4 | 102.4 | 102.4 | 102.4 | 102.4 | 102.4 | 102.4 |
| Fan diameter (in) | 68.3 | 68.3 | 68.3 | 68.3 | 68.3 | 68.3 | 68.3 | 68.3 | 68.3 |
| Basic dry weight (lb) | 5,250 | 5,250 | 5,250 | 5,250 | 5,250 | 5,250 | 5,250 | 5,250 | 5,250 |
|
Applications:
|
A321 | A321 | A321 ACJ318 |
A320 | A319 | A319 ACJ319 |
A319 ACJ319 ACJ320 |
A319 | A319 ACJ319 |
HISTORY OF THE CFM56-5B TURBOFAN ENGINE
The CFM56-5B, a high-performance, low-risk derivative engine of the CFM56 family, was originally developed to power the Airbus A321. Today, it is the only engine that can power every model of the A320 family with one bill of materials. This provides airlines with a distinct commonality advantage, in addition to the lowest cost of operation on this application.
Noise and emissions have become key factors in aircraft fleet planning and operations. The CFM56-5B was the first engine to introduce advanced double annular combustor (DAC) technology in the mid-1990s. This technology reduced NOx (oxides of nitrogen) emissions by as much as 45 percent. With the introduction of Tech Insertion and new combustor technology in 2007, CFM has been able to offer operators comparable improvement in a much simpler design. The optimized Tech Insertion combustor emits 25 percent less NOx to ensure that the engine meets the CAEP/6 regulations that went into effect in January 2008.
In addition to lowering NOx emissions, the CFM56-5B Tech Insertion configuration provides operators with up to 1 percent improvement in fuel consumption over the life of the product compared to the base CFM56-5B engine, which also means fewer carbon emissions.
DEVELOPMENT TIMELINE
| Milestone | Date | Milestone | Date |
| Initial development contract | November 1989 | A321/CFM56-5B SAC entry into service | March 1994 |
| First engine to test | October 1991 | A320/CFM56-5B certification | November 1994 |
| First CFM56-5B flight on 707 flight test bed | September 1992 | A321/CFM56-5B DAC entry into service | February 1995 |
| First engine to test with DAC | March 1993 | CFM56-5B Tech Insertion enters service | October 2007 |
| CFM56-5B certification | May 1993 | CFM56-5B/3 PIP entry into service | November 2011 |
| A321/CFM56-5B certification | February 1994 |
DID YOU KNOW?
The CFM56-5B was the first engine to introduce advanced double annular combustor (DAC) technology in the mid-1990s. This technology reduced NOx (oxides of nitrogen) emissions by as much as 45 percent.
LATEST INDUSTRY HEADLINES
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