General Electric YJ93: Difference between revisions
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|name= YJ93 |
|name= YJ93 |
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|image = General Electric YJ93-G-3.jpg |
|image = File:General Electric YJ93-G-3.jpg |
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|caption = YJ93-GE-3 engine at [[National Museum of the United States Air Force]] |
|caption = YJ93-GE-3 engine at [[National Museum of the United States Air Force]] |
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|manufacturer= [[GE Aviation|General Electric Aircraft Engines]] |
|manufacturer= [[GE Aviation|General Electric Aircraft Engines]] |
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|first run= |
|first run= |
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|major applications= |
|major applications= [[North American XB-70 Valkyrie]] |
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|number built = |
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|developed from = |
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[[Image:B58j93pod.jpg|thumb|right|YB-58 at Edwards AFB with GE J93 engine pod]] |
[[Image:B58j93pod.jpg|thumb|right|YB-58 at Edwards AFB with GE J93 engine pod]] |
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The '''General Electric YJ93''' [[turbojet]] engine was designed as the powerplant for both the North American |
The '''General Electric YJ93''' [[turbojet]] engine was designed as the powerplant for both the [[North American XB-70 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 {{convert|28,800|lbf|kN|abbr=on}}.<ref name="Jenkins_Landis"/> |
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==Design and development== |
==Design and development== |
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The YJ93 started life as the General Electric X275, an enlarged version of the [[J79]] turbojet. |
The YJ93 started life as the General Electric X275, an enlarged version of the [[General Electric J79]] turbojet. This evolved to the X279 when [[Mach number|Mach]] 3 cruise became a requirement, and ultimately became the YJ93.<ref>Jenkins, Dennis R. and Tony R. Landis. ''Valkyrie: North American's Mach 3 Superbomber''. North Branch, Minnesota: Specialty Press, 2005. ISBN 1-58007-072-8. |
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The XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.<ref>[http://home.att.net/~jbaugher2/b58_9.html NB-58A Testbed for General Electric J93<!-- Bot generated title -->]</ref> |
The XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.<ref>[http://home.att.net/~jbaugher2/b58_9.html NB-58A Testbed for General Electric J93<!-- Bot generated title -->]</ref> |
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==Applications== |
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* [[Convair B-58 Hustler|Convair NB-58A Hustler]] (testbed) |
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* [[North American XB-70 Valkyrie]] |
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* [[North American XF-108 Rapier]] (intended) |
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{{jetspecs |
{{jetspecs |
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|ref= |
|ref={{cn}} |
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|type=[[Turbojet]] |
|type=[[Turbojet]] |
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|length=6.2 m (237 in) |
|length=6.2 m (237 in) |
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{{aircontent |
{{aircontent |
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|related= |
|related= |
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* [[General Electric J79]] |
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* [[General Electric GE4]] |
* [[General Electric GE4]] |
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{{USAF gas turbine engines}} |
{{USAF gas turbine engines}} |
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{{aviation lists}} |
{{aviation lists}} |
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{{Aeroengine-specs}} |
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[[Category:Turbojet engines 1950–1959]] |
[[Category:Turbojet engines 1950–1959]] |
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Revision as of 07:14, 26 March 2015
| YJ93 | |
|---|---|
| |
| YJ93-GE-3 engine at National Museum of the United States Air Force | |
| Type | Turbojet |
| National origin | United States |
| Manufacturer | General Electric Aircraft Engines |
| Major applications | North American XB-70 Valkyrie |
| Developed into | General Electric GE4 |
The General Electric YJ93 turbojet engine was designed as the powerplant for both the North American XB-70 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 28,800 lbf (128 kN).[1]
Design and development
The YJ93 started life as the General Electric X275, an enlarged version of the General Electric J79 turbojet. This evolved to the X279 when Mach 3 cruise became a requirement, and ultimately became the YJ93.[2]
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 (3,200 km/h) (approximately Mach 3) at an altitude of 70,000 feet (21,000 m).[3]
The XF-108 interceptor was cancelled outright and the B-70 project was reoriented to a research project only.[4]
Applications
- Convair NB-58A Hustler (testbed)
- North American XB-70 Valkyrie
- North American XF-108 Rapier (intended)
Specifications (YJ93)
Data from [citation needed]
General characteristics
- Type: Turbojet
- Length: 6.2 m (237 in)
- Diameter: 1.33 m (52.5 in)
- Dry weight: 3800lb
Components
Performance
- Maximum thrust: 19,000 lbf (85 kN)[1] (28,800 lbf (128 kN) with afterburner)[1]
- Air mass flow: 275 lb/s (125 kg/s)[5]
- Specific fuel consumption: 0.700 lb/(lbf⋅h) or 19.8 g/(kN⋅s)[5] (1.800 lb/(lbf⋅h) or 51.0 g/(kN⋅s) with afterburner)[5]
See also
Related development
Comparable engines
Related lists
References
Wikimedia Commons has media related to General Electric YJ93.
- ^ a b c Jenkins, Dennis R. and Tony R. Landis. North American XB-70A Valkyrie WarbirdTech Volume 34. North Branch, Minnesota: Specialty Press, 2002. ISBN 1-58007-056-6.
- ^ Jenkins, Dennis R. and Tony R. Landis. Valkyrie: North American's Mach 3 Superbomber. North Branch, Minnesota: Specialty Press, 2005. ISBN 1-58007-072-8.
- ^ National Museum of the USAF
- ^ NB-58A Testbed for General Electric J93
- ^ a b c Military Turbojet/Turbofan Specifications