{"id":14925,"date":"2026-01-23T12:02:43","date_gmt":"2026-01-23T16:02:43","guid":{"rendered":"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/nasa-conducts-hot-fire-of-rs-25-engine\/"},"modified":"2026-01-23T12:02:43","modified_gmt":"2026-01-23T16:02:43","slug":"nasa-conducts-hot-fire-of-rs-25-engine","status":"publish","type":"post","link":"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/nasa-conducts-hot-fire-of-rs-25-engine\/","title":{"rendered":"NASA Conducts Hot Fire of RS-25 Engine"},"content":{"rendered":"<h2 style=\"text-align: center;\">NASA Conducts Hot Fire of RS-25 Engine<\/h2>\n<p><!-- no image --><\/p>\n<div class=\"hds-image-carousel grid-container grid-container-block padding-top-4 padding-bottom-4 hds-module hds-module-full alignfull wp-block-nasa-blocks-image-carousel\">\n<div class=\"hds-carousel-wrapper\">\n<div class=\"image-carousel-slider margin-0\" data-client-id=\"carousel-69739b89353c4\" data-variation=\"carousel\" data-autoplay=\"\" data-autoplay-speed=\"2000\" data-play-pause=\"\" data-transition-type=\"slide\" data-progress=\"\" data-progress-labels=\"\" data-start-label=\"Start\" data-end-label=\"End\" data-labels-initialized=\"true\">\n<div class=\"display-block width-full\" data-label=\"\">\n<figure class=\"margin-0\">\n<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?w=1024\" class=\"attachment-large size-large\" alt=\"a closer look at vapor clouds escaping towards the sky during hot fire on the Fred Haise Test Stand\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg 5568w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=300,200 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=768,512 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=1024,683 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=1536,1024 1536w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=2048,1365 2048w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=400,267 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=600,400 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=900,600 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=1200,800 1200w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00001h.jpg?resize=2000,1333 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">NASA conducts a hot fire of RS-25 engine No. 2063 on the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, on Jan. 22, 2026.<\/div>\n<div class=\"hds-credits\">NASA\/Chris Russell<\/div>\n<\/figcaption><\/div>\n<\/p><\/div>\n<\/figure><\/div>\n<div class=\"display-block width-full\" data-label=\"\">\n<figure class=\"margin-0\">\n<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?w=1024\" class=\"attachment-large size-large\" alt=\"a closer look at vapor clouds escaping towards the sky during hot fire on the Fred Haise Test Stand\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg 5568w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=300,200 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=768,512 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=1024,683 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=1536,1024 1536w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=2048,1365 2048w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=400,267 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=600,400 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=900,600 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=1200,800 1200w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00002h.jpg?resize=2000,1333 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">NASA conducts a hot fire of RS-25 engine No. 2063 on the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, on Jan. 22, 2026.<\/div>\n<div class=\"hds-credits\">NASA\/Chris Russell<\/div>\n<\/figcaption><\/div>\n<\/p><\/div>\n<\/figure><\/div>\n<div class=\"display-block width-full\" data-label=\"\">\n<figure class=\"margin-0\">\n<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?w=1024\" class=\"attachment-large size-large\" alt=\"a reflection of the Fred Haise Test Stand during a hot fire test is captured on nearby body of water\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg 5568w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=300,200 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=768,512 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=1024,683 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=1536,1024 1536w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=2048,1365 2048w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=400,267 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=600,400 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=900,600 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=1200,800 1200w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00003h.jpg?resize=2000,1333 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">NASA conducts a hot fire of RS-25 engine No. 2063 on the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, on Jan. 22, 2026.<\/div>\n<div class=\"hds-credits\">NASA\/Chris Russell<\/div>\n<\/figcaption><\/div>\n<\/p><\/div>\n<\/figure><\/div>\n<div class=\"display-block width-full\" data-label=\"\">\n<figure class=\"margin-0\">\n<div class=\"hds-cover-wrapper hds-image-carousel-slide margin-bottom-2\">\n<div class=\"hds-media-wrapper margin-left-auto margin-right-auto\">\n<figure class=\"hds-media-inner hds-cover-wrapper hds-media-ratio-cover \"><img decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?w=1024\" class=\"attachment-large size-large\" alt=\"a hot fire of RS-25 engine No. 2063 on the Fred Haise Test Stand\" block_context=\"nasa-block\" loading=\"lazy\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg 8250w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=300,200 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=768,511 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=1024,681 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=1536,1022 1536w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=2048,1363 2048w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=400,266 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=600,399 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=900,599 900w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=1200,799 1200w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2026\/01\/ssc-20260122-s00004h.jpg?resize=2000,1331 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\"><\/figure><figcaption class=\"hds-caption padding-y-2\">\n<div class=\"hds-caption-text p-sm margin-0\">NASA conducts a hot fire of RS-25 engine No. 2063 on the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, on Jan. 22, 2026.<\/div>\n<div class=\"hds-credits\">NASA\/Chris Russell<\/div>\n<\/figcaption><\/div>\n<\/p><\/div>\n<\/figure><\/div>\n<\/p><\/div>\n<div class=\"hds-carousel-nav display-flex margin-left-auto margin-right-0\" data-carousel-id=\"image-carousel-slider-carousel-69739b89353c4\">\n\t\t\t\t<button class=\"hds-carousel-nav-arrow hds-carousel-arrow-prev\"><br \/>\n\t\t\t\t\t<svg version=\"1.1\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewbox=\"0 0 9 9\"><path class=\"st0\" d=\"M3.5,4.5l3.7-3.6L6.3,0L1.8,4.5L6.3,9l0.9-0.9L3.5,4.5z\"><\/path><\/svg><br \/>\n\t\t\t\t<\/button><br \/>\n\t\t\t\t\t\t\t<button class=\"hds-carousel-nav-arrow hds-carousel-arrow-next margin-right-0\"><br \/>\n\t\t\t\t\t<svg version=\"1.1\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" x=\"0px\" y=\"0px\" width=\"9px\" height=\"9px\" viewbox=\"0 0 9 9\"><path class=\"st0\" d=\"M5.5,4.5L1.8,8.1L2.7,9l4.5-4.5L2.7,0L1.8,0.9L5.5,4.5z\"><\/path><\/svg><br \/>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>NASA successfully conducted a hot fire of RS-25 engine No. 2063 on Jan. 22 at the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, clearing the way for the engine to be installed for the agency\u2019s Artemis IV mission. \u00a0<\/p>\n<p>The RS-25 engines help power NASA\u2019s SLS (Space Launch System) rocket that will carry astronauts to the Moon under the Artemis campaign.<\/p>\n<p>Engine No. 2063 originally was installed on the SLS core stage for the Artemis II mission but was removed in 2025 after engineers discovered a hydraulic leak on the engine\u2019s main oxidizer valve actuator, which controls propellant flow into the engine combustion chamber.<\/p>\n<p>Following standard NASA procedures, teams removed the engine from the core stage and replaced the actuator.<\/p>\n<p>Because NASA requires any significantly modified or repaired engine to undergo hot fire testing before flight, teams at NASA Stennis fired the engine for five minutes (300 seconds), at up to 109% of its rated power level in a test known as a confidence test that demonstrates the engine is ready for flight.<\/p>\n<p>The test was conducted by a team of operators from NASA, L3Harris Technologies, and Sierra Lobo, Inc., the NASA Stennis test operations contractor. NASA Stennis provides critical data to L3Harris, the prime engines contractor for the SLS rocket.<\/p>\n<p>With the successful test complete, engine No. 2063 is scheduled to be installed on the SLS core stage for Artemis IV. All RS-25 engines for NASA\u2019s Artemis missions are tested and proven flightworthy at NASA Stennis before flight.<\/p>\n<p>NASA\u00a0is targeting as soon as February to send four astronauts around the Moon and back on <a href=\"https:\/\/www.nasa.gov\/artemis-ii-press-kit\/\">Artemis II<\/a>, the first crewed mission under the Artemis campaign. During launch, the SLS rocket will use four RS-25 engines, along with a pair of solid rocket boosters, to help lift the Orion spacecraft and the crew away from Earth using more than 8.8 million pounds of thrust.<\/p>\n<p>Under the Artemis campaign, NASA is returning humans to the Moon for economic benefits, scientific discovery, and to prepare for crewed missions to Mars.<\/p>\n<div class=\"nasa-gb-align-center nasa-button-link padding-y-1 padding-x-0 hds-module aligncenter wp-block-nasa-blocks-related-link\">\n\t<a href=\"https:\/\/www.nasa.gov\/blogs\/artemis\/\" target=\"_self\" class=\"button-primary button-primary-md link-external-false\" aria-label=\"Read Updates at the Artemis Blog\"><br \/>\n\t\t<span class=\"line-height-alt-1\">Read Updates at the Artemis Blog<\/span><br \/>\n\t\t<svg viewbox=\"0 0 32 32\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle class=\"button-primary-circle\" cx=\"16\" cy=\"16\" r=\"16\"><\/circle><path d=\"M8 16.956h12.604l-3.844 4.106 1.252 1.338L24 16l-5.988-6.4-1.252 1.338 3.844 4.106H8v1.912z\" class=\"color-spacesuit-white\"><\/path><\/svg><br \/>\n\t<\/a><\/p><\/div>\n<\/p>\n<p class=\"wpematico_credit\"><small>Powered by <a href=\"http:\/\/www.wpematico.com\" target=\"_blank\">WPeMatico<\/a><\/small><\/p>\n<p><a  href=\"https:\/\/www.nasa.gov\/image-article\/hot-fire-of-rs25-engine\/\"  target=\"_blank\" rel=\"noopener\">Get The Details&#8230;<\/a><br \/>\nLaToya Dean  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>NASA successfully conducted a hot fire of RS-25 engine No. 2063 on Jan. 22 at the Fred Haise Test Stand at NASA\u2019s Stennis Space Center near Bay St. Louis, Mississippi, clearing the way for the engine to be installed for the agency\u2019s Artemis IV mission. \u00a0 The RS-25 engines help power NASA\u2019s SLS (Space Launch [\u2026] <a class=\"continue-reading-link\" href=\"https:\/\/zobi.alcowep.com\/bourtagshdrevxnls658739\/nasa-conducts-hot-fire-of-rs-25-engine\/\"> Continue reading 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