General Electric GE4
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.
| GE4 | |
|---|---|
 | |
| 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
Specifications (GE4/J5P)
General characteristics
- Type: Turbojet
- Length: 27ft 4 in (8,331m)
- Diameter: 5ft 11 in (1,803m)
- Dry weight: 11,300 lb (5,100 kg)[5]
Components
- Compressor: Nine-stage axial[5]
- Combustors: Annular straight-through-flow[5]
- Turbine: Two-stage axial[5]
- Fuel type: Special high-temperature JP-6 Fuel
Performance
- Maximum thrust: 50,000 lbf (220 kN) (63,200 lbf (281 kN) with afterburning)
- Overall pressure ratio: 12.5:1[5]
- Turbine inlet temperature: 2,200 °F (1,204 °C)[5]
- Thrust-to-weight ratio: 6.02
See also
Related development
Comparable engines
Related lists
References
- FLIGHT International. 6 January 1966. p. 33.
- FLIGHT International. 6 January 1972. pp. 16a-17.
- "SUPERSONIC TRANSPORT DEVELOPMENT PROGRAM. PHASE III PROPOSAL. BOEING MODEL 2707". Retrieved 2008-12-29.
- FLIGHT International. 5 January 1967. p. 23.
- Aircraft engines of the world, Paul H. Wilkinson, 1970. ISBN 0-911710-24-8
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