NASA'S J-2X locomotive kick Off 2012 With Power pack test

A innovative sequence of tests on the locomotive that will help take humans to bottomless space will begin next week at NASA's Stennis Space Center in southern Mississippi. The test on the J-2X engine bring NASA one pace closer to the first human-rated liquid oxygen and liquid hydrogen rocket train to be urbanized in 40 years.

Tests will center on the power pack for the J-2X. This extremely well-organized and versatile higher rocket engine is being intended to power the upper stage of NASA's Space Launch System, a new heavy-lift launch vehicle capable of missions beyond low-Earth orbit. The power pack comprise components on the top portion of the engine, including the gas generator, oxygen and fuel turbo pumps, and related ducts and valves that bring the propellants jointly to make burning and make thrust.

About a dozen power pack tests of unreliable length are slated now from side to side summer at Stennis' A-1 Test Stand. By unraveling the engine mechanism the thrust chamber assembly, counting the main combustion chamber, main injector and needle engineers can more with no trouble push the various components to function over a wide variety of conditions to ensure the parts' integrity, show the safety margin and better appreciate how the turbopumps operate.

"By anecdotal the pressures, temperatures and flow rates, the power pack test series will evaluate the full range of operating circumstances of the engine components," said Tom Byrd, J-2X engine lead in the SLS Liquid Engines Office at NASA's Marshall Space Flight Center in Huntsville, Ala. "This will enable us to verify the components' design and validate our analytical models against performance data, as well as ensure structural stability and verify the combustion stability of the gas generator."

This is the second power pack test series for J-2X. The powerpack 1A was tested in 2008 with J-2S engine turbo machinery originally developed for the Apollo Program. Engineers tested these heritage components to obtain data to help them modify the design of the turbomachinery to meet the higher performance requirements of the J-2X engine.

"The test engineers on the A-1 test team are excited and ready to begin another phase of testing which will provide critical data in support of the Space Launch System," said Gary Benton, J-2X engine testing project manager at Stennis.J-2X is being developed for Marshall by Pratt & Whitney Rocketdyne of Canoga Park, Calif.