General Electric GE4

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GE4
General Electric GE4 2.JPG
The General Electric GE4/J5 afterburning turbojet
Type Turbojet
National origin United States
Manufacturer General Electric
First run 1967
Major applications Boeing 2707
Produced 1967 - 1972
Number built 3
Developed from General Electric YJ93
A mock-up of the GE4/J5 single-shaft afterburning turbojet

The General Electric GE4 turbojet engine was designed in the late 1960s as the powerplant for the Boeing 2707 supersonic transport. The GE4 was a nine-stage, single-shaft, axial-flow turbojet based largely on the General Electric YJ93 which powered the North American XB-70 bomber.[1] The GE4 was the most powerful engine of its era, producing 50,000 lbf (220 kN) dry, and 65,000 lbf (290 kN) with afterburner.[2] The Boeing 2707 was cancelled in 1971, putting an end to further work on the GE4.

Specifications (GE4/J5P)[edit]

Data from [3][4]

General characteristics

  • Type: Turbojet
  • Length: 27ft 4 in (833.1cm)
  • Diameter: 5ft 11 in (180.3cm)
  • Dry weight: 11,300 lb (5,100 kg)[5]

Components

Performance

Other Specifications[edit]

  • Compressor inlet diameter: 60.6 in (1,539 mm)[5]
  • Exhaust nozzle diameter: 74.2 in (1,880 mm)
  • Core airflow: 620 lb (280 kg) per second
  • Noise:
    • Takeoff: 104 dB
    • Sideline: 117 dB
    • Approach: 107 dB

See also[edit]

Related development
Comparable engines
Related lists

References[edit]

  1. ^ FLIGHT International. 6 January 1966. p. 33. 
  2. ^ FLIGHT International. 6 January 1972. pp. 16a–17. 
  3. ^ "SUPERSONIC TRANSPORT DEVELOPMENT PROGRAM. PHASE III PROPOSAL. BOEING MODEL 2707.". Retrieved 2008-12-29. 
  4. ^ FLIGHT International. 5 January 1967. p. 23. 
  5. ^ a b c d e f g Aircraft engines of the world, Paul H. Wilkinson, 1970. ISBN 0-911710-24-8