JT9D-7R4G2

Turbofan · Pratt & Whitney
Reaction Turbines
Maximum Takeoff Thrust
243.5 kN
Bypass Ratio
4.8
Overall Pressure Ratio
26.3
Fuel Flow Take Off
2.429 kg/s
NOx Unitaryto CAEP8
140.7 % 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 —
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 26.3 Afterburner No

Pictures

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PW4056 Pratt & Whitney 249.1 4.7 29.3 Compare
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All data (51 fields)
Name
JT9D-7R4G2
EASA ID
1PW029
Aircraft Engine Manufacturer
Pratt & Whitney
Aircraft Engine Type
Turbofan
Fuel
Jet A
Geared Fan
No
Afterburner
No
Streams
2
Bypass Ratio
4.8
Overall Pressure Ratio
26.3
Maximum Takeoff Thrust (kN)
243.5
Hydrocarbon Take Off (g/kg fuel)
0.15
Hydrocarbon Climb Out (g/kg fuel)
0.14
Hydrocarbon Approach (g/kg fuel)
0.18
Hydrocarbon Idle (g/kg fuel)
1.55
Hydrocarbon Unitary Average (g/kN)
2.6
Hydrocarbon Unitary Characteristic (g/kN)
2.9
Hydrocarbon Unitary Characteristicto Regulatory (% of limit)
14.9
Hydrocarbon LTO (g)
620
Carbon Monoxide Take Off (g/kg fuel)
0.74
Carbon Monoxide Climb Out (g/kg fuel)
0.63
Carbon Monoxide Approach (g/kg fuel)
1.4
Carbon Monoxide Idle (g/kg fuel)
11.82
Carbon Monoxide Unitary Average (g/kN)
19.5
Carbon Monoxide Unitary Characteristic (g/kN)
20.7
Carbon Monoxide Unitary Characteristicto Regulatory (% of limit)
17.6
NOx Take Off (g/kg fuel)
41.3
NOx Climb Out (g/kg fuel)
29.5
NOx Approach (g/kg fuel)
8.8
NOx Idle (g/kg fuel)
3.8
NOx Unitary Average (g/kN)
60.5
NOx Unitary Characteristic (g/kN)
63.2
NOx Unitaryto Standard (% of limit)
68.3
NOx Unitaryto CAEP2 (% of limit)
85.4
NOx Unitaryto CAEP4 (% of limit)
103.5
NOx Unitaryto CAEP6 (% of limit)
117.7
NOx Unitaryto CAEP8 (% of limit)
140.7
NOx LTO (g)
14253
Smoke Take Off (SN)
6.8
Smoke Max (SN)
6.8
Smoke Characteristic (SN)
7.5
Smoke Characteristicto Regulatory (% of limit)
40.3
Fuel Flow Take Off (kg/s)
2.429
Fuel Flow Climbout (kg/s)
1.88
Fuel Flow Approach (kg/s)
0.659
Fuel Flow Idle (kg/s)
0.2239
Fuel LTO (kg)
858
Fuel Venting Compliant
No
Carbon Monoxide LTO (g)
4582
Emissions Data Status
C
Engine Status
Out of production