AJ-10
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This article is outdated. Please update this article to reflect recent events or newly available information. Please see the talk page for more information. (December 2011) |
 AJ10-118K |
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| Country of origin |  United States |
|---|---|
| Date | 1957—Present |
| Manufacturer | Aerojet |
| Application | Upper stage/Spacecraft propulsion |
| Status | In use |
| Liquid-fuel engine | |
| Propellant | N2O4 / Aerozine 50 |
| Cycle | Pressure-fed cycle |
| Configuration | |
| Chamber | 1 |
| Performance | |
| Thrust (Vac.) | 43.7kN |
| Chamber pressure | 7 - 9 MPa |
| Isp (Vac.) | 3130 N·s/kg [1] |
| Dimensions | |
| Diameter | 0.84 m |
| Dry weight | 90 - 100 kg |
| Used in | |
| Delta-K Orion Transtage |
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The AJ-10 or AJ10 is a hypergolic rocket engine. It has been used to propel the upper stages of several carrier rockets, including the Delta II and Titan III. It was also to have been used as the main engine of the Orion Crew Exploration Vehicle for NASA's Project Constellation.
It was first used in the Able second stage of the Vanguard rocket, in the AJ10-118 configuration. It was fuelled by nitric acid and UDMH.[2] On the first Vanguard flight, Vanguard TV3 on 6 December 1957, a problem with the vehicle's first stage caused the rocket to explode on the launch pad. Another launch attempt, on 5 February 1958, also failed during the first stage burn. An AJ10 engine was first fired in flight during the third Vanguard launch, on 17 March 1958, which successfully placed the Vanguard 1 satellite into orbit.
The AJ10-101 engine was used on an uprated version of the Able, used on Atlas-Able and Thor-Able rockets. The first flight, of a Thor-Able, occurred on 23 April 1958, however the Thor failed before the upper stage fired. The second flight, which saw the first firing of an AJ10-101 engine, occurred on 10 July 1958.[3]
The Apollo Service Module's Service Propulsion System used a single AJ10-137 engine.
The AJ10-190 engine was used for the Space Shuttle Orbital Maneuvering System, necessary for de-orbiting.
The version currently in use on the Delta II rocket's upper stage, the Delta-K, is the AJ10-118K. It uses Aerozine 50 propellent, and N2O4 oxidiser.
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See also
References
- ^ {http://www.b14643.de/Spacerockets_2/United_States_5/Delta_II/Design/DeltaII_1.htm}
- ^ Wade, Mark. "AJ10-118" (in English). Encyclopedia Astronautica. Archived from the original on 6 July 2008. http://www.astronautix.com/engines/aj10118.htm. Retrieved 2008-06-22.
- ^ Wade, Mark. "Thor-Able" (in English). Encyclopedia Astronautica. http://www.astronautix.com/lvs/thorable.htm. Retrieved 2008-05-24.
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