The General Electric GE4/J5 afterburning turbojet
Type Turbojet
National origin United States
Manufacturer General Electric
First run 1967
Major applications Boeing 2707
Lockheed L-2000
Produced 1967 - 1972
Number built 3[citation needed]
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)

Data from [3][4]

General characteristics



Other Specifications

See also

Related development

Comparable engines

Related lists


  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". Archived from the original on May 15, 2012. Retrieved 2008-12-29.
  4. ^ FLIGHT International. 5 January 1967. p. 23.
  5. ^ a b c d e f g h Aircraft engines of the world, Paul H. Wilkinson, 1970. ISBN 0-911710-24-8