JT4A-12

Engine model
Manufacturer Pratt & Whitney
Engine type Turbojet

Technical specifications

Design
HP compressor stages
7
HP turbine stages
1
LP compressor stages
8
LP turbine stages
2
Dimensions
Fan diameter
1.08 m
3.54 ft
Length
4.8 m
15.75 ft
Performance
Pressure ratio
12.5:1
Thrust limits
Max. continuous thrust
66.3 kN
14,900 lbf
Max. takeoff thrust
77.8 kN
17,500 lbf
Weights
Dry weight
2,220 kg
4,894 lb

Aircraft models

Manufacturer Name Aircraft family
Boeing 707-321 Airplane
Boeing 707-328 Airplane
Boeing 707-329 Airplane
Boeing 707-331 Airplane
Boeing 707-344 Airplane