NASA Building SLS Core Stages for Second, Third Artemis Moon Missions

Credit: NASA

Technicians are simultaneously manufacturing NASA’s Space Launch System (SLS) core stages for the Artemis II and Artemis III lunar missions at NASA’s Michoud Assembly Facility in New Orleans. The core stage for the deep space rocket consists of two huge propellant tanks, four RS-25 engines, and miles of cabling for the avionics systems and flight computers. All the main core stage structures for Artemis II, the first mission with astronauts, have been built and are being outfitted with electronics, feedlines, propulsion systems, and other components. Technicians are currently wiring and performing functional tests on the avionics inside both the forward skirt and intertank sections. The engine section – the most complicated part of the stage – is in production assembly.

Engineers are welding the core stage structures for the Artemis III mission, which will land the first woman and the next man on the lunar surface, through a process called friction stir welding. Each of the structures for the core stage has rings that attach the pieces together to produce one stage during final assembly. The rings are trimmed down to 1/1000th of an inch at the ring machining center then sent to another part of the facility for the next phase of manufacturing. Assembling the 5.5-million-pound SLS rocket for the Artemis missions takes special tools and is a collaborative effort between NASA and Boeing, the lead contractor for the core stage.

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