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<\/p>\nThe four RS-25 engines from Aerojet Rocketdyne successfully propelled the Core Stage, Interim Cryogenic Propulsion System, and Orion\/Service Module stack into its initial Earth orbit during the system\u2019s debut launch on Nov. 16, 2022.<\/p>\n
The engines fired for a full duration of nearly eight and a half minutes, inserting the SLS stack into a 30 x 1,800 km initial Earth orbit trajectory before their destructive plunge with the Core Stage back into the atmosphere near the Hawaiian islands.<\/p>\n<\/p>\n
The reentry ended the careers for RS-25 engines 2045, 2060, 2056, and 2058, all four of which were responsible for launching 118 individual people into low Earth orbit during their use with the Shuttle fleet.<\/p>\n
During their final use with Artemis I, the engines saw the performance they returned during the Shuttle era: \u201cperfect.\u201d<\/p>\n
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The four RS-25 engines that powered Artemis I into its initial Earth orbit. (Credit: NASA\/Aerojet Rocketdyne)<\/p>\n
\u201cAs our chief engineer likes to say, the performance was perfect. And that\u2019s not too far from the facts,\u201d said Doug Bradley, RS-25 Deputy Program Director, Aerojet Rocketdyne, in an interview with NASASpaceflight.<\/p>\n
Aerojet Rocketdyne completed an initial quick-look data review of the four RS-25 engines on Artemis I within an hour of the launch via telemetry sent back to the ground during flight.<\/p>\n
A more in-depth review followed a week later, with a joint Aerojet Rocketdyne\/NASA review coming on Monday, Nov. 28.<\/p>\n
Spaceflight history books (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n The joint review was a moment for both teams to come together and review their independent analyses of the four RS-25 engines\u2019 performances.<\/p>\n \u201cWe like to do them independently to start with to see if we\u2019re coming up with the same answers,\u201d noted Bradley.<\/p>\n Those reviews all point to excellent and within family performance of all four engines.<\/p>\n<\/p>\n