Green Run Update: SLS Team Prepares Core Stage for Second Hot Fire Test
BAY ST. LOUIS, Miss., February 12, 2021 (NASA PR) — The core stage Green Run test team has completed refurbishment activities and is preparing the Space Launch System (SLS) rocket’s core stage and its four RS-25 engines for a second hot fire test.
After the first SLS core stage hot fire test on Jan. 16 at NASA’s Stennis Space Center near Bay St. Louis, Mississippi, the team put the stand and core stage in a configuration so that the stage and stand could be refurbished. This involved installing platforms on the test stand so that technicians could inspect, access, and perform procedures on the hardware.
The team has now completed this refurbishment work and conducted a review referred to as “the break of configuration review” to transition the core stage hardware to the test configuration for the second hot fire test. During refurbishment, the team thoroughly inspected the stage, dried the four RS-25 engines, and made minor repairs to the engines and thermal protection system.
The team is also modifying and testing the Green Run software for the flight computers based on data from the first hot fire. The team adjusted parameters used by the software logic, which operating on the flight computers automatically monitors a variety of parameters and controls the test during the terminal countdown and after engine ignition. The updated Green Run software was tested in the systems integration test facility at NASA’s Marshall Space Flight Center in Huntsville, Alabama, which has avionics and flight computers identical to the ones in the core stage.
Now, the team is preparing the core stage, the B-2 Test Stand, and the Stennis Test Control Centers for the upcoming hot fire test targeted for the week of Feb. 21. A target date for the test will be announced next week. The core stage is flight hardware that will be used for the Artemis I mission.
For updates, please check this blog or the Green Run web site: https://www.nasa.gov/artemisprogram/greenrun
14 responses to “Green Run Update: SLS Team Prepares Core Stage for Second Hot Fire Test”
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2 million pounds of thrust and and Isp of just over 450 seconds….awesome.
1.67 million pounds of thrust – a bit less than that produced by the 1st stage of a Falcon 9. Of course a Falcon 9 1st stage can get itself, an interstage, a 2nd stage and a payload off the pad with that much thrust. The SLS core stage can’t even get itself off the pad without help. It requires those two huge SRBs. There are two of them because crutches usually come in pairs.
And the sea-level Isp of an RS-25 is 363 seconds.
Not quite so awesome.
What a fool.
My prediction on the second try is that there will be anomalies enough to cause concern, but not enough to prevent shipping it to the cape
or disaster 🙂
No such levity is ever tolerated when musing about spacex product misadventure….just another display of how NewSpace ideology has corroded and contaminated the public perception of space exploration.
I make jokes about them all the time
Never seen you write disaster with a smile on the end. Don’t be disingenuous Robert.
Capt. Bob is often mistaken, but rarely disingenuous. SLS, though, is not one of the things he’s either mistaken or disingenuous about.
Nobody asked the Trumpist idiot in the room.
True.
They will have no choice if they want this booster to fly. You are only able to cycle the fuel a limited number of times before the changes will cause a failure.
wonder how much this cost I go along with redneck…
It’s a jobs program for NASA, cost is not the issue, keeping the jobs are.