Second J-2X engine prepares for SLS testing

February 12, 2013 by Chris Bergin

Engineers at the Stennis Space Center in Mississippi are preparing for a series of tests on a second J-2X engine – designated as unit 10002. This new series of evaluations will follow on from the 21 tests conducted on the 10001 J-2X, as the hardware prepares for its role as the future Upper Stage engine on the Space Launch System (SLS).

J-2X Testing:

The J-2X initially held the role of the single engine on the Ares I Upper Stage, with work towards that goal beginning in 2006. It too had its own heritage, based on engineering that reached back as far as the 1960s, with the original J-2 engine – five of which powered the SII Second Stage of the Saturn V.

This latest variant is capable of generating 294,000 lbf (1,310 kN) of thrust, and is now deep into testing at Stennis Space Center.

The J-2X has been in development for several years, with Pratt & Whitney Rocketdyne successfully evaluating the initial J-2X gas generator design back in 2008, followed by the completion of a second round of successful gas generator tests in 2010.

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