General Electric YJ93

The General Electric YJ93 turbojet engine was designed as the powerplant for both the North American XB-70A Valkyrie bomber and the North American XF-108 Rapier interceptor. The YJ93 was a single-shaft axial-flow turbojet with a variable-stator compressor and a fully-variable convergent/divergent exhaust nozzle. The maximum sea-level thrust was 31,500 pounds.

Unfortunately, the XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.

Specifications

• Thrust dry:22,000 lb
• Thrust wet:31,000 lb
• SFC dry:0.700 lb/(lb.h)
• SFC wet:1.800 lb/(lbf.h)
• Core airflow:275lb/s

See also

• Pratt & Whitney J58
• Rolls-Royce/Snecma Olympus 593
• Kuznetsov NK-321
• Tumansky R-15