The General Electric YJ93 was a turbojet engine design for the XB-70 and XF-108 project. The engine was a single shaft axial flown turbojet with a variable stator compressor and a fully-variable convergent/divergent exhaust nozzle. The maximum sea-level thrust was 28,800 lbf.
he YJ93 started life as the General Electric X275, an enlarged version of the J-79
tturbojet. This evolved to the X279 when Match 3 cruise became a requirement, and ultimately became the YJ93.
The engine used a special high-temperature JP-6 fuel. The six YJ93 engines in the XB-70 Valkyrie were capable of producing a thrust to weight ratio of 5, allowing for a speed of 2,000 mph (approximately Mach 3) at an altitude of 70,000 feet.
After the cancellation of XF-108 program, the XB-70 was turned into research project and one of the engine was put into museum exhibit.
Specification
- Thrust dry: 19,000 lbf
- Thrust wet: 28,800 lbf
- TSFC dry: 0.700 lb/(lb.h)
- TSFC wet: 1.800 lb/(lbf.h)
- Core airflow: 275 lb/s
References:
http://en.wikipedia.org/wiki/General_Electric_YJ93
Bao,
ReplyDeleteThis post is OK. But you make a lot of assumptions (remember that word?) that your reader knows what all these things mean. You should have "XB-70 and XF-108" as links for me to view what they are. Why don't you show me the webpage you are getting your information from and post it here? You also need to check your formatting; your background is black and you have some black words written over it, so they appear invisible. Also, have after your reference you have a bullet point floating. Please fix. 8 points.