| Family |
LEAP-1B |
CFM56-5C |
| EASA ID |
20CM100 |
7CM045 |
| Aircraft Engine Manufacturer |
CFM International |
CFM International |
| Aircraft Engine Type |
Turbofan |
Turbofan |
| Comment |
Boeing 737 MAX |
Airbus A340-200/-300 |
| Dry Weight (kg) |
2780 |
3990 |
| Diameter (mm) |
1763 |
1836 |
| Max Rotating Diameter (mm) |
1763 |
1836 |
| Length (mm) |
3147 |
|
| Height (mm) |
2256 |
|
| Width (mm) |
2421 |
|
| Wikipedia Article (URL) |
en.wikipedia.org/wiki/CFM_International_LEAP |
en.wikipedia.org/wiki/CFM_International_CFM56 |
| Fuel |
Jet A |
Jet A |
| Fan Blades |
18 |
|
| Geared Fan |
No |
No |
| Low-Pressure Compressor Stages |
3 |
|
| High-Pressure Compressor Stages |
10 |
|
| Combustion Chamber |
TAPS II |
SAC |
| High Pressure Compressor Stages |
2 |
|
| Low-Pressure Turbine Stages |
5 |
|
| Afterburner |
No |
No |
| Streams |
2 |
2 |
| Bypass Ratio |
8.3 |
6.8 |
| Overall Pressure Ratio |
42 |
28.2 |
| Maximum Takeoff Thrust (kN) |
130.4 |
137.61 |
| Hydrocarbon Take Off (g/kg fuel) |
0.05 |
0 |
| Hydrocarbon Climb Out (g/kg fuel) |
0.04 |
0 |
| Hydrocarbon Approach (g/kg fuel) |
0.05 |
0 |
| Hydrocarbon Idle (g/kg fuel) |
0.46 |
5.8 |
| Hydrocarbon Unitary Average (g/kN) |
0.61 |
7.2 |
| Hydrocarbon Unitary Sigma (g/kN) |
0.09 |
|
| Hydrocarbon Unitary Range (g/kN) |
0.66-0.84 |
|
| Hydrocarbon Unitary Characteristic (g/kN) |
0.94 |
11.1 |
| Hydrocarbon Unitary Characteristicto Regulatory (% of limit) |
4.8 |
56.6 |
| Hydrocarbon LTO (g) |
79 |
986 |
| Carbon Monoxide Take Off (g/kg fuel) |
0.18 |
0.8 |
| Carbon Monoxide Climb Out (g/kg fuel) |
0.15 |
0.7 |
| Carbon Monoxide Approach (g/kg fuel) |
0.99 |
2.1 |
| Carbon Monoxide Idle (g/kg fuel) |
13.77 |
35.1 |
| Carbon Monoxide Unitary Average (g/kN) |
16.68 |
45.7 |
| Carbon Monoxide Unitary SD (g/kN) |
0.77 |
|
| Carbon Monoxide Unitary Range (g/kN) |
16.97-18.38 |
|
| Carbon Monoxide Unitary Characteristic (g/kN) |
20.48 |
56.2 |
| Carbon Monoxide Unitary Characteristicto Regulatory (% of limit) |
17.4 |
47.6 |
| NOx Take Off (g/kg fuel) |
64.36 |
29.7 |
| NOx Climb Out (g/kg fuel) |
29.59 |
23.8 |
| NOx Approach (g/kg fuel) |
11.92 |
9.3 |
| NOx Idle (g/kg fuel) |
4.68 |
3.9 |
| NOx Unitary Average (g/kN) |
60.1 |
45.4 |
| NOx Unitary SD (g/kN) |
1.38 |
|
| NOx Unitary Range (g/kN) |
56.39-59.15 |
|
| NOx Unitary Characteristic (g/kN) |
69.66 |
52.6 |
| NOx Unitaryto Standard (% of limit) |
56.2 |
54.6 |
| NOx Unitaryto CAEP2 (% of limit) |
70.2 |
68.2 |
| NOx Unitaryto CAEP4 (% of limit) |
76.6 |
82.1 |
| NOx Unitaryto CAEP6 (% of limit) |
84 |
93.2 |
| NOx Unitaryto CAEP8 (% of limit) |
94 |
110.5 |
| NOx LTO (g) |
7837 |
6240 |
| Smoke Take Off (SN) |
0.94 |
10.7 |
| Smoke Climb Out (SN) |
0.85 |
8.4 |
| Smoke Approach (SN) |
1.07 |
1 |
| Smoke Idle (SN) |
0.8 |
1.1 |
| Smoke Max (SN) |
1.16 |
10.7 |
| Smoke Sigma (SN) |
0.29 |
|
| Smoke Range (SN) |
0.34-0.9 |
|
| Smoke Characteristic (SN) |
1.49 |
13.8 |
| Smoke Characteristicto Regulatory (% of limit) |
6.8 |
63.6 |
| Fuel Flow Take Off (kg/s) |
1.075 |
1.252 |
| Fuel Flow Climbout (kg/s) |
0.873 |
1.035 |
| Fuel Flow Approach (kg/s) |
0.285 |
0.342 |
| Fuel Flow Idle (kg/s) |
0.097 |
0.109 |
| Fuel LTO (kg) |
380 |
441 |
| Fuel Venting Compliant |
Yes |
No |
| Carbon Monoxide LTO (g) |
2176 |
6278 |
| Compressor Description |
1 fan, 3-stage LP, 10-stage HP |
|
| Emissions Data Status |
C |
C |
| Emissions Data Superseded |
Yes |
|
| Emissions Superseded By |
01P20CM138 |
|
| Engine Status |
|
Out of production |
| NOx Compliance Demonstration |
2.3.2 e) |
|
| Turbine Description |
2-stage HP, 5-stage LP |
|