Artemis II SLS Rocket Booster Segments Arrive at Kennedy Space Center
In New Orleans, All Engines Added to Moon Rocket Core Stage
The 10 booster motor segments for NASA’s SLS (Space Launch System) rocket that will help propel the Artemis II astronauts on a trip around the Moon arrived at the agency’s Kennedy Space Center in Florida Monday. They will form the SLS rocket’s twin, five-segment solid rocket boosters, which produce more than 75% of the total thrust at liftoff, to send NASA’s Artemis missions to the Moon.
“The arrival of the SLS solid rocket booster motor segments is an important turning point as NASA and our Artemis partners begin readying for stacking and launch preparations for Artemis II.”
Amit Kshatriya, NASA
Due to their weight, the 10 booster motor segments traveled by rail across eight states in specialized transporters to the spaceport. Teams with NASA’s Exploration Ground Systems Program now are preparing to process each of the segments inside the space center’s Rotation, Processing and Surge Facility ahead of integrating them inside the Vehicle Assembly Building.
“The arrival of the SLS solid rocket booster motor segments is an important turning point as NASA and our Artemis partners begin readying for stacking and launch preparations for Artemis II,” said Amit Kshatriya, Deputy Associate Administrator for the Moon to Mars Program Office at NASA Headquarters. “Fully stacked, these boosters for NASA’s SLS rocket are the largest, most powerful ever built for spaceflight and will help send the first astronauts around the Moon in more than 50 years.”
Manufactured by SLS booster lead contractor Northrop Grumman in Utah, the SLS solid rocket boosters have three major assemblies with the motor segment being the largest portion of the booster. Teams will inspect them along with the forward and aft skirt assemblies of the boosters. They will then rotate the segments to a vertical position in preparation for stacking operations for Artemis II. The top and bottom portions of the boosters were previously assembled in the Booster Fabrication Facility at Kennedy.
Once processing is complete, crews will move all the major segments one at a time to the Vehicle Assembly Building where they will get stacked to form each of the 17-story-tall boosters that flank each side of the rocket. Following completion, engineers and technicians will integrate the rocket’s core stage. Together, the SLS rocket’s twin boosters and the core stage’s four RS-25 engines produce more than 8.8 million pounds of thrust.
Meanwhile, in New Orleans, teams at NASA’s Michoud Assembly Facility have structurally joined all four RS-25 engines onto the core stage for NASA’s Artemis II Moon rocket. The flight test is the agency’s first crewed mission under Artemis.
Technicians added the first engine to NASA’s SLS (Space Launch System) rocket core stage Sept. 11. Teams installed the second engine onto the stage Sept. 15 with the third and fourth engines Sept. 19 and Sept. 20. Technicians with NASA, Aerojet Rocketdyne, an L3Harris Technologies company and the RS-25 engines lead contractor, along with Boeing, the core stage lead contractor, now will focus efforts on the complex task of fully securing the engines to the stage and integrating the propulsion and electrical systems within the structure.
The SLS core stage, at 212 feet, is the backbone of the Moon rocket. Its two huge propellant tanks provide more than 733,000 gallons of super-chilled liquid propellant to the four RS-25 engines, while the stage’s flight computers, avionics, and electrical systems act as the “brains” of the rocket. During Artemis II, the RS-25 engines will together provide more than 2 million pounds of thrust for eight minutes of flight, helping to send the Artemis II crew beyond low-Earth orbit to venture around the Moon.