Difference between revisions of "J-2X (Engine)"

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==Differences from the J-2==
 
==Differences from the J-2==
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[[Image:J2X_schematic.gif|thumb|right|Schematic of the J-2X]]
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While the J-2 was a [[gas-generator cycle]] or open cycle rocket engine, the '''J-2X''' uses so called [[tap-off cycle]] for powering its [[turbopumps]]. In such a cycle, a small part of the hot exhaust gases from the [[combustion chamber]] is used for powering the two turbopump assemblies. These turbopumps are connected in series with a hot-gas duct. After passing the oxidizer turbopump, the hot gases are directed into the nozzle exhaust stream.
  
  
 
[[Category:rocket engines]]
 
[[Category:rocket engines]]
 
{{Stub}}
 
{{Stub}}

Revision as of 08:25, 5 November 2007

The J-2X is a modern gas generator cycle, bi-propellant rocket engine, planned for use in the Ares I and Ares V launch vehicles. It consumes liquid hydrogen and liquid oxygen. It has its origin in the J-2 rocket engines used by the Saturn Ib and Saturn V launchers. It is produced by Pratt and Whitney Rocketdyne.

Differences from the J-2

Schematic of the J-2X

While the J-2 was a gas-generator cycle or open cycle rocket engine, the J-2X uses so called tap-off cycle for powering its turbopumps. In such a cycle, a small part of the hot exhaust gases from the combustion chamber is used for powering the two turbopump assemblies. These turbopumps are connected in series with a hot-gas duct. After passing the oxidizer turbopump, the hot gases are directed into the nozzle exhaust stream.

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