CFM56-5B General
Engine Type
CFM56-5B
Type
Turbofan Engine
Thrust Rating (lbf)
22,000 - 33,000
Manufacturer
CFM
CFM56-5B Program Milestones
Initial Development Contract
November 1989
First Engine To Test (FETT)
October 1991
Flight Test on 707
September 1992
First Engine test with DAC
March 1993
CFM-56-5B Certification
May 1993
A321/CFM56-5B Certification
February 1994
A321/CFM56-5B Service Entry
March 1994
A320/CFM56-5B Certification
November 1994
A321/CFM56-5B DAC Serv. Entry
February 1995


CFM56-5B (All Versions) Dimensions
Length
102.4 inch
Fan Diameter
68.3 inch
Basic Dry Weight
5,250 lb




CFM56-5B

The CFM56-5B is a high-performance derivative engine of the CFM56 family and was originally developed to power the Airbus A321. Today, the -5B powers every model in the A320 family. As the only engine that is able to power every model of the A320 family with on bill of materials, the CFM56-5B provides airlines 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 and will become even more important in the foreseeable future. The CFM56-5B is the only engine in the A320 family to offer advanced double annular combustor technology which reduces oxides nitrogen emissions by as much as 45 percent. The technology was so well received in the marketplace that nearly 40 percent of all CFM56-5B powered A320's in service or on order with European airlines are equipped with this technology.


Frontier Airbus A318
TAP Airbus A319 climbing out of runway 24
Iberia Airbus A321 preparing for departure
Examples of aircraft that are powered by the CFM56-5B

CFM56-5B Performance

Take-off Conditions (Sea Level)
CFM56 -5B1 -5B2 -5B3 -5B4 -5B5 -5B6 -5B7 -5B8 -5B9
Max Take-off (lb)
30,000
31,000
33,000
27,000
22,000
23,500
27,000
21,500
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 (35,000 ft-Mach=0.80-ISA)
CFM56 -5B1 -5B2 -5B3 -5B4 -5B5 -5B6 -5B7 -5B8 -5B9
Max Cl. Thrust
6,420
6,420
6,420
5,630
5,630
5,630
6,420
5,630
5,630
Overall Press. Ratio
35.4
35.4
35.5
32.6
32.6
32.6
35.5
32.6
32.6
Max Cr. Thrust
5,840
5,840
5,840
5,020
5,020
5,020
5,840
5,020
5,020

Applications
CFM56 -5B1 -5B2 -5B3 -5B4 -5B5 -5B6 -5B7 -5B8 -5B9
Aircraft
 
A319CJ

Volareweb.com CFM56-5B powered A320