SLS Liquid Hydrogen Tank in Production for NASA’s Artemis IV Mission

Crews at NASA’s Michoud Assembly Facility in New Orleans load alluminum alloy panels into the Vertical Weld Center June 1. The Vertical Weld Center is a friction-stir weld tool for the large structures of the core stage for the SLS (Space Launch System) rocket. Teams load the panels into the VWC using an overhead crane system, then multiple panels are welded together to create entire barrels. The panels in these images are some of the five barrels that will form the SLS liquid hydrogen propellant tank for the SLS rocket that will power NASA’s Artemis IV mission, which is also the first flight of SLS in its more powerful Block 1B configuration. The SLS core stage is made up of five unique elements: the forward skirt, liquid oxygen tank, intertank, liquid hydrogen tank, and the engine section. The liquid hydrogen propellant tank holds 537,000 gallons of liquid hydrogen cooled to minus 432 degrees Fahrenheit and sits between the core stage’s intertank and engine section. The liquid hydrogen hardware, along with the liquid oxygen tank, provides propellant to the four RS-25 engines at the bottom of the core stage to produce more than two million pounds of thrust to help launch the Artemis IV mission to the Moon. Together with its four RS-25 engines, the rocket’s massive 212-foot-tall core stage — the largest stage NASA has ever built — and its twin solid rocket boosters produce 8.8 million pounds of thrust to send NASA’s Orion spacecraft, astronauts and supplies beyond Earth’s orbit to the Moon. NASA is working to land the first woman and first person of color on the Moon under Artemis. SLS is part of NASA’s backbone for deep space exploration, along with Orion and the Gateway in orbit around the Moon. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon in a single mission.