General Electric GE4
| GE4 | |
|---|---|
 The General Electric GE4/J5 afterburning turbojet | |
| Type | Turbojet |
| National origin | United States |
| Manufacturer | General Electric |
| First run | 1967 |
| Major applications | |
| Manufactured | 1967 – 1972 |
| Number built | 3[citation needed] |
| Developed from | General Electric YJ93 |
The General Electric GE4 turbojet engine was designed in the late 1960s as the powerplant for the Boeing 2707 supersonic transport.[1][2] 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.[3] 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.[4] The Boeing 2707 was cancelled in 1971, putting an end to further work on the GE4.
Specifications (GE4/J5P)
[edit]Data from Boeing,[5] Flight International[6]
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)[7]
Components
- Compressor: Nine-stage axial[7]
- Combustors: Annular straight-through-flow[7]
- Turbine: Two-stage axial[7]
- Fuel type: Special high-temperature JP-6 Fuel
Performance
- Maximum thrust: 50,000 lbf (220 kN) (63,200 lbf (281 kN) with afterburner)
- Overall pressure ratio: 12.5:1[7]
- Turbine inlet temperature: 2,200 °F (1,204 °C)[7]
- Thrust-to-weight ratio: 6.02
- Power-to-weight ratio: 6.07[7]
Other Specifications
[edit]See also
[edit]Related development
Comparable engines
Related lists
References
[edit]- ↑ "Advanced supersonic technology study - Engine program summary supersonic propulsion - 1971 to 1976" (PDF). Archived from the original (PDF) on 2024-11-05.
- ↑ "The Greatest Program That Never Was: The U.S.'s Answer to Concorde | GE Aerospace News".
- ↑ 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". Archived from the original on May 15, 2012. Retrieved 2008-12-29.
- ↑ FLIGHT International. 5 January 1967. p. 23.
- 1 2 3 4 5 6 7 8 Aircraft engines of the world, Paul H. Wilkinson, 1970. ISBN 0-911710-24-8