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. 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.

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