General_Electric_GE4

General Electric GE4

General Electric GE4

Turbojet engine by General Electric

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.

Quick Facts GE4, Type ...
A mock-up of the GE4/J5 single-shaft afterburning turbojet

Specifications (GE4/J5P)

Data from [3][4]

General characteristics

  • Type: Afterburning turbojet
  • Length: 27ft 4 in (8,331mm)
  • Diameter: 5ft 11 in (1,803mm)
  • Dry weight: 11,300 lb (5,100 kg)[5]

Components

Performance

Other Specifications

  • 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

Related development

Comparable engines

Related lists

References

  1. [1]
    FLIGHT International. 6 January 1966. p. 33.
  2. [2]
    FLIGHT International. 6 January 1972. pp. 16a–17.
  3. [3]
    "SUPERSONIC TRANSPORT DEVELOPMENT PROGRAM. PHASE III PROPOSAL. BOEING MODEL 2707". Archived from the original on May 15, 2012. Retrieved 2008-12-29.
  4. [4]
    FLIGHT International. 5 January 1967. p. 23.
  5. [5]
    Aircraft engines of the world, Paul H. Wilkinson, 1970. ISBN 0-911710-24-8
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