LEAP-1B21

Turbofan · Family: LEAP-1B · CFM International
Reaction Turbines Compare the ratings
Maximum Takeoff Thrust
111.3 kN
Bypass Ratio
8.5
Overall Pressure Ratio
36.8
Diameter
1763 mm
Length
3147 mm
Dry Weight
2780 kg
Fuel Flow Take Off
0.877 kg/s
NOx Unitaryto CAEP8
66.2 % of limit

Architecture

Fan Fan Stages — Fan Blades 18 Fan Technology — Fan Pressure Ratio —
Gearbox Geared Fan No Gear — Reduction Ratio —
LP compressor Low-Pressure Compressor Stages 3 Low-Pressure Compressor Technology — BP Compressor Pressure Ratio —
IP compressor Intermediary-Pressure Compressor Stages — Intermediary-Pressure Compressor Technology — IP Compressor Pressure Ratio —
HP compressor High-Pressure Compressor Stages 10 High-Pressure Compressor Technology — HP Compressor Pressure Ratio —
Combustor Combustion Chamber TAPS II
HP turbine High Pressure Compressor Stages 2 High-Pressure Turbine Technology —
IP turbine Intermediary-Pressure Turbine Stages — Intermediary-Pressure Turbine Technology —
LP turbine Low-Pressure Turbine Stages 5 Low-Pressure Turbine Technology —
Whole engine Streams 2 Bypass Ratio 8.5 Overall Pressure Ratio 36.8 Afterburner No

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LEAP-1B

Name Maximum Takeoff Thrust (kN) Bypass Ratio Overall Pressure Ratio Fuel Flow Take Off (kg/s) NOx LTO (g) NOx Unitaryto CAEP8 (% of limit) Smoke Max (SN) EASA ID
LEAP-1B21 111.3 8.5 36.8 0.877 4053 66.2 1.16 20CM094
LEAP-1B23 115.2 8.5 37.9 0.916 4573 69.7 1.16 20CM095
LEAP-1B25 119.2 8.4 40.135 0.96 5417 74.9 1.16 20CM096
LEAP-1B27 124.7 8.3 40.5 1.014 6326 82.7 1.16 20CM098
LEAP-1B28B2C 124.7 8.3 40.5 1.014 6326 82.7 1.16 20CM099
LEAP-1B28BBJ2 124.7 8.3 40.5 1.014 6326 82.7 1.16 20CM097
LEAP-1B28 130.4 8.6 41.5 1.061 7534 91.6 1.16 18CM084
LEAP-1B28/28B2/28B1/28B3 130.4 8.3 42 1.075 7837 94 1.16 20CM101
LEAP-1B28B2 130.4 8.6 41.5 1.061 7534 91.6 1.16 18CM085
LEAP-1B28BBJ1 130.4 8.3 42 1.075 7837 94 1.16 20CM100
LEAP-1B28/28B1/28B2/28B3 130.4085 8.2397 42.0298 1.07 8343.335 91.3548 2.1594 08P28CM143

Airplanes

Name Model Aircraft Engine Number of Engines Length (m) Flat Wing Span (m) Two Class Typical Seating Max Seating
737-8 737 MAX 8 LEAP-1B28/28B1/28B2/28B3 2 39.52 35.92 178 189
737-9 737 MAX 9 LEAP-1B28/28B1/28B2/28B3 2 42.16 35.92

Similar reaction turbines

Name Aircraft Engine Manufacturer Maximum Takeoff Thrust (kN) Bypass Ratio Overall Pressure Ratio
Rolls-Royce Pegasus Bristol Engine Company (Bristol) 106 Compare
CFM56-5-A1 CFM International 111.2 6 26.6 Compare
Progress D-27 Ivchenko-Progress ZMKB 119 Compare
Dobrynin RD-7 Dobrynin 103 Compare
Kuznetsov NK-88 Kuznetsov Design Bureau 103 Compare
Kuznetsov NK-89 Kuznetsov Design Bureau 103 Compare
All data (81 fields)
Name
LEAP-1B21
Family
LEAP-1B
EASA ID
20CM094
Aircraft Engine Manufacturer
CFM International
Aircraft Engine Type
Turbofan
Comment
Boeing 737 MAX
Dry Weight (kg)
2780
Diameter (mm)
1763
Max Rotating Diameter (mm)
1763
Length (mm)
3147
Height (mm)
2256
Width (mm)
2421
Wikipedia Article (URL)
en.wikipedia.org/wiki/CFM_International_LEAP
Fuel
Jet A
Fan Blades
18
Geared Fan
No
Low-Pressure Compressor Stages
3
High-Pressure Compressor Stages
10
Combustion Chamber
TAPS II
High Pressure Compressor Stages
2
Low-Pressure Turbine Stages
5
Afterburner
No
Streams
2
Bypass Ratio
8.5
Overall Pressure Ratio
36.8
Maximum Takeoff Thrust (kN)
111.3
Hydrocarbon Take Off (g/kg fuel)
0.04
Hydrocarbon Climb Out (g/kg fuel)
0.04
Hydrocarbon Approach (g/kg fuel)
0.05
Hydrocarbon Idle (g/kg fuel)
0.71
Hydrocarbon Unitary Average (g/kN)
0.96
Hydrocarbon Unitary Sigma (g/kN)
0.09
Hydrocarbon Unitary Range (g/kN)
0.66-0.84
Hydrocarbon Unitary Characteristic (g/kN)
1.47
Hydrocarbon Unitary Characteristicto Regulatory (% of limit)
7.5
Hydrocarbon LTO (g)
106
Carbon Monoxide Take Off (g/kg fuel)
0.15
Carbon Monoxide Climb Out (g/kg fuel)
0.16
Carbon Monoxide Approach (g/kg fuel)
1.49
Carbon Monoxide Idle (g/kg fuel)
16.19
Carbon Monoxide Unitary Average (g/kN)
21.19
Carbon Monoxide Unitary SD (g/kN)
0.77
Carbon Monoxide Unitary Range (g/kN)
16.97-18.38
Carbon Monoxide Unitary Characteristic (g/kN)
26.01
Carbon Monoxide Unitary Characteristicto Regulatory (% of limit)
22
NOx Take Off (g/kg fuel)
30.39
NOx Climb Out (g/kg fuel)
17.53
NOx Approach (g/kg fuel)
10.26
NOx Idle (g/kg fuel)
4.74
NOx Unitary Average (g/kN)
36.42
NOx Unitary SD (g/kN)
1.38
NOx Unitary Range (g/kN)
56.39-59.15
NOx Unitary Characteristic (g/kN)
42.22
NOx Unitaryto Standard (% of limit)
37.2
NOx Unitaryto CAEP2 (% of limit)
46.4
NOx Unitaryto CAEP4 (% of limit)
52.4
NOx Unitaryto CAEP6 (% of limit)
58.2
NOx Unitaryto CAEP8 (% of limit)
66.2
NOx LTO (g)
4053
Smoke Take Off (SN)
0.94
Smoke Climb Out (SN)
0.85
Smoke Approach (SN)
1.07
Smoke Idle (SN)
0.8
Smoke Max (SN)
1.16
Smoke Sigma (SN)
0.29
Smoke Range (SN)
0.34-0.9
Smoke Characteristic (SN)
1.49
Smoke Characteristicto Regulatory (% of limit)
6.5
Fuel Flow Take Off (kg/s)
0.877
Fuel Flow Climbout (kg/s)
0.722
Fuel Flow Approach (kg/s)
0.245
Fuel Flow Idle (kg/s)
0.089
Fuel LTO (kg)
330
Fuel Venting Compliant
Yes
Carbon Monoxide LTO (g)
2358
Compressor Description
1 fan, 3-stage LP, 10-stage HP
Emissions Data Status
C
Emissions Data Superseded
Yes
Emissions Superseded By
01P20CM133
NOx Compliance Demonstration
2.3.2 e)
Turbine Description
2-stage HP, 5-stage LP