Difference between revisions of "J-2X (Engine)"
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The '''J-2X''' is a modern [[expander 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 (Engine)|J-2]] rocket engines used by the [[Saturn Ib]] and [[Saturn V]] launchers. It is produced by [[Rocketdyne]]. | The '''J-2X''' is a modern [[expander 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 (Engine)|J-2]] rocket engines used by the [[Saturn Ib]] and [[Saturn V]] launchers. It is produced by [[Rocketdyne]]. | ||
| − | ==Differences | + | ==Differences from the J-2== |
While the J-2 was a [[gas-generator cycle]] or open cycle rocket engine, the '''J-2X''' uses an expander cycle (also called closed cycle) for powering its [[turbopumps]]. In this engine cycle, the propellant, which gets used for [[regenerative cooling]] of [[chamber]] and [[nozzle]] is also used to drive a [[turbine]], which provides power to the turbopumps. | While the J-2 was a [[gas-generator cycle]] or open cycle rocket engine, the '''J-2X''' uses an expander cycle (also called closed cycle) for powering its [[turbopumps]]. In this engine cycle, the propellant, which gets used for [[regenerative cooling]] of [[chamber]] and [[nozzle]] is also used to drive a [[turbine]], which provides power to the turbopumps. | ||
Revision as of 11:26, 25 April 2006
The J-2X is a modern expander 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 Rocketdyne.
Differences from the J-2
While the J-2 was a gas-generator cycle or open cycle rocket engine, the J-2X uses an expander cycle (also called closed cycle) for powering its turbopumps. In this engine cycle, the propellant, which gets used for regenerative cooling of chamber and nozzle is also used to drive a turbine, which provides power to the turbopumps.