JT9D-7Q

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
4
LP turbine stages
4
Dimensions
Fan diameter
2.38 m
7.81 ft
Length
3.92 m
12.86 ft
Performance
Bypass ratio
4.9:1
Pressure ratio
24.5:1
Thrust limits
Max. continuous thrust
199.8 kN
44,920 lbf
Max. takeoff thrust
230.9 kN
51,900 lbf
Weights
Dry weight
4,153 kg
9,156 lb