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.
The engine used a special high-temperture JP-6 fuel. The six YJ93 engines in the XB-70A Valkyrie were capable of producing a thrust to weight ratio of 5:1, allowing for a speed of 2000 mph (approximtely Mach 3) at an altitude of 70,000 feet.[1] The YJ93 engine is believed to be the conceptional design engine for the high altitude reconnaissance SR-71 aircraft.
Unfortunately, the XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.[2]
Specifications
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- Thrust dry:22,000 lb[3]
- Thrust wet:31,000 lb[3]
- SFC dry:0.700 lb/(lb.h)[3]
- SFC wet:1.800 lb/(lbf.h)[3]
- Core airflow:275lb/s[3]
See also
References
External links
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