General Electric GE4

The General Electric GE4 turbojet engine was designed in the late 1960s as the powerplant for both the Boeing 2707 supersonic transport (where it was known as the GE4/J5P variant). The GE4 was a single-stage, single-shaft, axial-flow turbojet based largely on the General Electric YJ93 which powered the North American XB-70 bomber.

The engine was very large and powerful for its time. It delivered a maximum sea-level thrust of 63,200 pounds. The engine, with a length of 25 ft 8 in (7.8 m), an envelope diameter of 74.2 inches (2.92 m), and a weight of 10,500 lb (4763 kg), was comprised of nine compressor stages and two turbine stages.

The Boeing 2707 was cancelled in 1971, putting an end to further work on the GE4. It still remains the most powerful afterburning turbojet ever developed.

pecifications

* Thrust: 63,200 lb augmented
* Compressor inlet diameter: 60.6 in
* Exhaust nozzle diameter: 74.2 in
* Core airflow: 620 lb (281 kg) per sec
* Noise: 104 PNdB (takeoff); 117 PNdB (sideline); 107 PNdB (approach)

ee also

* Rolls-Royce/Snecma Olympus 593