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Aerojet Rocketdyne refurbishing RS-25 engines for Artemis 1 launch and production restart testing

Aerojet Rocketdyne refurbishing RS-25 engines for Artemis 1 launch and production restart testing
April 9, 2021
With the completion of another single-engine RS-25 development test, Aerojet Rocketdyne is now refurbishing five engines at the Stennis Space Center in Mississippi for their next use. After the second test firing of the Retrofit 2 series in the A-1 Test Stand on April 6, development engine 0528 is going through a streamlined refurbishment prior to its next firing as a part of the production restart Retrofit 2 test series.
In parallel, the four RS-25 engines installed on the first Space Launch System (SLS) Core Stage in the nearby B Test Stand are being taken through a longer refurbishment checklist for flight engine hardware. The next planned ignition for those Core Stage engines is for the first SLS launch on the Artemis 1 mission to send an Orion spacecraft to lunar orbit. ....

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NASA decides to redo SLS Green Run Static Fire - NASASpaceFlight.com

NASA decides to redo SLS Green Run Static Fire
January 30, 2021
As expected, but now official, NASA has announced the decision to redo the Green Run Hot-Fire test of the agency’s Space Launch System (SLS) Core Stage at the Stennis Space Center in Mississippi. The Core Stage was fired for 67 seconds on January 16 in the B-2 Test Stand at Stennis before the test was ended early.
The SLS Program, Core Stage prime contractor Boeing, and RS-25 engine prime contractor Aerojet Rocketdyne are continuing to refurbish their vehicle hardware and Stennis is recycling their ground systems for a second attempt to fire the stage for a full eight minute flight duration near the end of February. ....

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NASA, Aerojet Rocketdyne plan busy RS-25 test schedule for 2021

NASA, Aerojet Rocketdyne plan busy RS-25 test schedule for 2021
December 31, 2020
Hot-fire tests of new RS-25 engine components will resume in 2021 to certify a new manufacturing process during production. Over one hour of engine run-time is planned for the Retrofit 2 series to test an expanded set of new engine parts that serve to achieve a primary objective of the production restart program: improving affordability by applying modern manufacturing technologies like additive manufacturing, also called “3-D printing,” to building new engines.
Aerojet Rocketdyne plans to complete two other development engine builds in 2021 that will go into the test stand for subsequent test series, including an all-new build that will demonstrate the first new engine powerhead and nozzle assemblies built for RS-25 engines in nearly two decades. ....

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