| LEAP-1B21 ✕ | Dobrynin RD-7 ✕ | |
|---|---|---|
| Family | LEAP-1B | |
| EASA ID | 20CM094 | |
| Aircraft Engine Manufacturer | CFM International | Dobrynin |
| Aircraft Engine Type | Turbofan | Turbojet |
| Comment | Boeing 737 MAX | |
| Dry Weight (kg) | 2780 | 3750 |
| Diameter (mm) | 1763 | 1410 |
| Max Rotating Diameter (mm) | 1763 | |
| Length (mm) | 3147 | 7300 |
| Height (mm) | 2256 | |
| Width (mm) | 2421 | |
| Wikipedia Article (URL) | en.wikipedia.org/wiki/CFM_International_LEAP | en.wikipedia.org/wiki/Dobrynin_RD-7 |
| Fuel | Jet A | |
| Fan Blades | 18 | |
| Geared Fan | No | 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 | Yes |
| Streams | 2 | 1 |
| Bypass Ratio | 8.5 | |
| Overall Pressure Ratio | 36.8 | |
| Maximum Takeoff Thrust (kN) | 111.3 | 103 |
| Thrust To Weight | 4.27 | |
| 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 | |
| Afterburner Thrust (kN) | 157 | |
| Carbon Monoxide LTO (g) | 2358 | |
| Compressor Description | 1 fan, 3-stage LP, 10-stage HP | Axial flow, 9-stage LP, 7-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 | Axial, 2-stage |