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over 50 years ago Rocketdyne developed

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the j2 a high-performance upper stage

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rocket propulsion system the original j2

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combined liquid hydrogen and liquid

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oxygen to produce 225 thousand pounds of

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thrust

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today Pratt & Whitney Rocketdyne has

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capitalized upon a half-century of human

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spaceflight experience and is developing

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the j-2x a modern state-of-the-art

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rocket engine fusing advanced

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technologies design techniques and

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groundbreaking material and

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manufacturing processes to produce 294

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earlier this month Assembly of the first

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j-2x was finalized at NASA's Stennis

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Space Center upon assembly completion

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engineers and technicians representing a

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combined labor force from NASA Lockheed

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Martin and Pratt & Whitney Rocketdyne

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transferred j-2x engine number one zero

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zero zero one from building 90 101 and

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installed it into test stand a two Tim

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Lorenz his Pratt & Whitney Rocketdyne SJ

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2x program integrator at NASA's Stennis

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Space Center we took the engine out of

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the mobile dolly or the workplan

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platform it's a combination mobile dolly

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with platforms placed it onto the

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trailer and brought it over to the test

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stand and backed it up into the ramp

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down below here and put it up on onto

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the engine vertical installer which you

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see behind it after being hoisted up the

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GSE ground support equipment was removed

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and the engine was readied for final

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positioning into the gimbal joint I was

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kind of worried about how we were going

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to unattach

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the GSC or the hardware that actually

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attaches to the gimbal on the engine to

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pick it up because it is a large

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structure and the access to the bolts

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that attach it to the gimbal

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was very difficult one of the more

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senior GSE technicians volunteered to

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take on the task donned his fall arrest

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gear and while four stories up perched

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out over the edge of the stand and laid

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down right inside the engine to remove

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the Volt's matt seal is PWRs Stennis

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Space Center j-2x test stand lead well

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we have to go through all the planning

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that put the engine together make sure

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it's all closed out and complete and

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then we have to get to do all the

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functional checkouts that marries the

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test stand to the engine and then verify

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everything is good to go before we test

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the first time the challenge is going to

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be making sure we learn all the new

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systems and verify that all the hardware

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is being tested the important part is

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everything has been looked at and are

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confident you're safe to test at that

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point then it's pure excitement you get

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smoking and fire and it's it's really

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fun to watch so that part of its going

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to be very exciting as we move forward

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anthony Soames is PWRs test & Controls

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manager at NASA Stennis I would say it's

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going well everyone's working

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exceptionally well together we all have

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the same vested interest and that is a

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successful test of its j-2x engine we're

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lucky to have a very mature workforce

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that have been around big rocket engines

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for a long time that understand the

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behavior of a rocket engine that

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understand the processes that it takes

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to put a rocket engine together in hot

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fire we can be proud of what's been

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accomplished to date if you look at the

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time frame from the engine design

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through fabrication assembly and now

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we're here with engine installation for

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first test all in a very aggressive but

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successful time line build upon a

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heritage a legacy of success the j-2x

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will now be a great asset as the nation

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selects architecture to move forward for

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space exploration and manned space