JT9D-7

Engine model
Manufacturer Pratt & Whitney
Engine type Turbofan

Technical specifications

Design
Fan stages
1
HP compressor stages
11
HP turbine stages
2
LP compressor stages
3
LP turbine stages
4
Water injection Yes
Dimensions
Fan diameter
2.43 m
7.97 ft
Length
3.93 m
12.89 ft
Performance
Bypass ratio
5.2:1
Pressure ratio
22.3:1
Thrust limits
Max. continuous thrust
176.4 kN
39,650 lbf
Max. takeoff thrust
202.4 kN
45,500 lbf
Max. takeoff thrust (wet)
209.1 kN
47,000 lbf
Weights
Dry weight
3,992 kg
8,801 lb

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