Pratt & Whitney JT9D

Turbofan · Pratt & Whitney
Reaction Turbines
Bypass Ratio
4.8
Diameter
2372.36 mm
Length
3370.58 mm
Dry Weight
3904.523 kg

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 — Afterburner No

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Airplanes

Name Aircraft Engine Number of Engines Length (m) Flat Wing Span (m) Max Seating
747-100 Pratt & Whitney JT9D 4 68.6 59.6 366
747SP Pratt & Whitney JT9D 4 55.85 59.64 331
All data (13 fields)
Name
Pratt & Whitney JT9D
Aircraft Engine Manufacturer
Pratt & Whitney
Aircraft Engine Type
Turbofan
Dry Weight (kg)
3904.523
Diameter (mm)
2372.36
Length (mm)
3370.58
Wikipedia Article (URL)
en.wikipedia.org/wiki/Pratt_%26_Whitney_JT9D
Geared Fan
No
Afterburner
No
Streams
2
Bypass Ratio
4.8
Compressor Description
3-stage low pressure 11-stage high pressure axial
Turbine Description
2-stage high pressure 4-stage low pressure