| GE4 | |
|---|---|
 | |
| 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 |
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.