Propulsion

NASA Fires RS-25 Engine for Full Flight Duration at Stennis

Developmental engine No. 10001 ran for about 500 seconds, as long as RS-25s burn during an SLS launch, to support future Artemis missions.

Published: 22 October 2026
Source: NASA
Reading time: 1 min

SSC-20211101-s00289NASA/SSC

On Oct. 21, NASA test-fired RS-25 engine No. 10001 on the Fred Haise Test Stand at Stennis Space Center near Bay St. Louis, Mississippi.

The developmental engine ran for nearly eight and a half minutes (500 seconds). That matches how long RS-25 engines burn when the Space Launch System (SLS) rocket lifts off.

Four RS-25 engines power the SLS core stage. According to NASA, hot-fire runs like this one are part of preparing the engines for future Artemis missions to the Moon.

Primary source

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