JT3D-7A

Engine model
Manufacturer Pratt & Whitney
Engine type Turbofan

Technical specifications

Design
Fan stages
2
HP compressor stages
7
HP turbine stages
1
LP compressor stages
6
LP turbine stages
3
Water injection Yes
Dimensions
Fan diameter
1.29 m
4.23 ft
Height
1.42 m
4.66 ft
Length
3.47 m
11.38 ft
Width
1.35 m
4.43 ft
Performance
Bypass ratio
1.4:1
Pressure ratio
13.5:1
Thrust limits
Max. continuous thrust
77.4 kN
17,390 lbf
Max. takeoff thrust
85.8 kN
19,280 lbf
Max. takeoff thrust (wet)
85.8 kN
19,280 lbf
Weights
Dry weight
1,969 kg
4,341 lb