PW4x56

Turbofan · Pratt & Whitney
Reaction Turbines
Maximum Takeoff Thrust
249.1 kN
Bypass Ratio
4.8
Overall Pressure Ratio
28.37
Fuel Flow Take Off
2.351 kg/s
NOx Unitaryto CAEP8
119.2 % of limit

Architecture

Fan Fan Stages — Fan Blades — Fan Technology — Fan Pressure Ratio —
Gearbox Geared Fan No Gear — Reduction Ratio —
LP compressor Low-Pressure Compressor Stages — 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 — High-Pressure Compressor Technology — HP Compressor Pressure Ratio —
Combustor Combustion Chamber Phase 3
HP turbine High Pressure Compressor Stages — High-Pressure Turbine Technology —
IP turbine Intermediary-Pressure Turbine Stages — Intermediary-Pressure Turbine Technology —
LP turbine Low-Pressure Turbine Stages — Low-Pressure Turbine Technology —
Whole engine Streams 2 Bypass Ratio 4.8 Overall Pressure Ratio 28.37 Afterburner No

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Name Aircraft Engine Manufacturer Maximum Takeoff Thrust (kN) Bypass Ratio Overall Pressure Ratio
JT9D-7R4H1 Pratt & Whitney 249.1 4.8 26.7 Compare
PW4056 Pratt & Whitney 249.1 4.7 29.3 Compare
PW4156 Pratt & Whitney 249.1 4.7 29.3 Compare
JT9D-7R4G2 Pratt & Whitney 243.5 4.8 26.3 Compare
PW4256 Pratt & Whitney 252.4 4.7 29.3 Compare
CF6-80C2B1 General Electric Company 249.01 5.1 29.53 Compare
All data (56 fields)
Name
PW4x56
EASA ID
1PW055
Aircraft Engine Manufacturer
Pratt & Whitney
Aircraft Engine Type
Turbofan
Fuel
Jet A
Geared Fan
No
Combustion Chamber
Phase 3
Afterburner
No
Streams
2
Bypass Ratio
4.8
Overall Pressure Ratio
28.37
Maximum Takeoff Thrust (kN)
249.1
Hydrocarbon Take Off (g/kg fuel)
0.08
Hydrocarbon Climb Out (g/kg fuel)
0.09
Hydrocarbon Approach (g/kg fuel)
0.16
Hydrocarbon Idle (g/kg fuel)
4.75
Hydrocarbon Unitary Average (g/kN)
6.4
Hydrocarbon Unitary Characteristic (g/kN)
9.9
Hydrocarbon Unitary Characteristicto Regulatory (% of limit)
50.3
Hydrocarbon LTO (g)
1597
Carbon Monoxide Take Off (g/kg fuel)
0.48
Carbon Monoxide Climb Out (g/kg fuel)
0.56
Carbon Monoxide Approach (g/kg fuel)
1.89
Carbon Monoxide Idle (g/kg fuel)
29.96
Carbon Monoxide Unitary Average (g/kN)
41
Carbon Monoxide Unitary Characteristic (g/kN)
50.3
Carbon Monoxide Unitary Characteristicto Regulatory (% of limit)
42.6
NOx Take Off (g/kg fuel)
30.44
NOx Climb Out (g/kg fuel)
24.24
NOx Approach (g/kg fuel)
11.97
NOx Idle (g/kg fuel)
3.93
NOx Unitary Average (g/kN)
49.2
NOx Unitary Characteristic (g/kN)
57
NOx Unitaryto Standard (% of limit)
59
NOx Unitaryto CAEP2 (% of limit)
73.7
NOx Unitaryto CAEP4 (% of limit)
88.6
NOx Unitaryto CAEP6 (% of limit)
100.6
NOx Unitaryto CAEP8 (% of limit)
119.2
NOx LTO (g)
12246
Smoke Take Off (SN)
8.5
Smoke Climb Out (SN)
5.8
Smoke Approach (SN)
0.6
Smoke Idle (SN)
0
Smoke Max (SN)
8.5
Smoke Characteristic (SN)
10.9
Smoke Characteristicto Regulatory (% of limit)
59.4
Fuel Flow Take Off (kg/s)
2.351
Fuel Flow Climbout (kg/s)
1.912
Fuel Flow Approach (kg/s)
0.643
Fuel Flow Idle (kg/s)
0.208
Fuel LTO (kg)
830
Fuel Venting Compliant
No
Carbon Monoxide LTO (g)
10202
Emissions Data Status
C
Engine Status
Out of production
NOx Compliance Demonstration
2.3.2 c)