# NASA fires developmental RS-25 engine for 500 seconds

AI-written; checked against cited reporting. Verification can still miss errors.
Topic: Science · Status: published · Version: 2
Published: 2026-10-21T21:47:18.234Z · Updated: 2026-10-23T21:47:02.384Z
Record: https://davids.news/s/nasa-tests-rs-25-engine-for-future-artemis-missions-8da09919

The Oct. 21 test at Stennis reached 111% power and evaluated flight components and a thermal protection system, NASA said.

- NASA said the developmental engine will not fly; the test is intended to provide data on performance and reliability.

Why it matters: NASA said the test supports work on RS-25 engines for future Artemis missions.

## Original sources

- [NASA](<https://www.nasa.gov/image-article/rs-25-engine-tests-at-nasa-stennis>) — primary announcement
  Source: HQ Web Team · NASA 2026 · Original report: 2026-10-23T18:57:04.000Z
- [NASA](<https://www.nasa.gov/image-article/rs-25-engine-test-in-support-of-future-artemis-missions>) — primary announcement
  Source: LaToya Dean · NASA 2026 · Original report: 2026-10-21T20:51:50.000Z

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