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General Electric GE4

Turbojet engine by General Electric

Field	Value
name	GE4
image	File:General_Electric_GE4_2.JPG
caption	The General Electric GE4/J5 afterburning turbojet
engine_type	Turbojet
national_origin	United States
manufacturer	General Electric
first_run	1967
major_applications
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. The GE4 was the most powerful engine of its era, producing 50000 lbf dry, and 65000 lbf with afterburner. The Boeing 2707 was cancelled in 1971, putting an end to further work on the GE4.

Specifications (GE4/J5P)

|power/weight=6.07 |thrust/weight=6.02

Other Specifications

Compressor inlet diameter: 60.6 in (1,539 mm)
Exhaust nozzle diameter: 74.2 in
Core airflow: 620 lb per second
Noise:
- Takeoff: 104 dB
- Sideline: 117 dB
- Approach: 107 dB

References

https://ntrs.nasa.gov/api/citations/19770011069/downloads/19770011069.pdf {{Bare URL PDF. (July 2025)
"The Greatest Program That Never Was: The U.S.'s Answer to Concorde {{pipe".
(6 January 1966). "FLIGHT International".
(6 January 1972). "FLIGHT International".
"SUPERSONIC TRANSPORT DEVELOPMENT PROGRAM. PHASE III PROPOSAL. BOEING MODEL 2707.".
(5 January 1967). "FLIGHT International".
''Aircraft engines of the world'', Paul H. Wilkinson, 1970. {{ISBN. 0-911710-24-8

Info: Wikipedia Source

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1960s-turbojet-engines general-electric-aircraft-engines

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