As teams continue to prepare NASA’s Space Launch System (SLS) rocket for its
debut flight with the launch of Artemis I, NASA and its partners across the
country have made great progress building the rocket for Artemis II, the
first crewed Artemis mission. The team is also manufacturing and testing
major parts for Artemis missions III, IV and V.
“The Space Launch System team is not just building one rocket but
manufacturing several rockets for exploration missions and future SLS
flights beyond the initial Artemis launch,” said John Honeycutt, SLS program
manager at NASA’s Marshall Space Flight Center in Huntsville, Alabama. “The
Artemis I mission is the first in a series of increasingly complex missions
that will extend our presence on the Moon. The SLS rocket’s unprecedented
power and capabilities will send missions farther and faster throughout the
solar system.”
With its two solid rocket boosters and four RS-25 engines, SLS produces more
than 8.8 million pounds of thrust to launch each Artemis mission beyond
Earth’s orbit and onward to the Moon. The rocket features some of the
largest, most advanced, and most reliable hardware elements ever built for
space exploration.
To power the agency’s next-generation deep space missions, SLS delivers
propulsion in phases. At liftoff, the core stage with its four RS-25 engines
and the twin boosters fire to propel SLS off the launch pad into orbit. Once
in orbit, the Interim Cryogenic Propulsion Stage (ICPS) provides the
in-space propulsion to send NASA’s Orion spacecraft and its crew on a
precise trajectory toward the Moon.
The first piece of rocket hardware – the ICPS – for Artemis II arrived in
Florida July 28, 2021. It is undergoing final preparations at lead
contractors Boeing and United Launch Alliance’s (ULA) facilities and will
soon be delivered nearby to NASA’s Kennedy Space Center. The ICPS fires its
RL10 engine, provided by Aerojet Rocketdyne, to send the Orion spacecraft
toward the Moon. ULA is already building the Artemis III ICPS in its factory
in Decatur, Alabama.
“The Space Launch System is a highly capable launch vehicle purposely
designed and rigorously tested to safely transport people, large cargo, and
flagship science missions to deep space destinations,” said John Blevins,
SLS chief engineer at Marshall. “From the beginning, the SLS rocket was
built to first safely send astronauts to space, and at the same time, to
evolve to an even more powerful configuration that can support a variety of
missions.”
Every NASA center and more than 1,000 different companies across America
helped build the Artemis I SLS rocket as well as the SLS rockets that will
launch future missions. The boosters and RS-25 engines – the main propulsion
elements of the rocket -- for the Artemis II and Artemis III missions are in
the final stages of assembly. In Utah, crews with Northrop Grumman, the lead
contractor for the boosters, have completed casting all the booster motor
segments for both Artemis II and Artemis III and began casting segments for
Artemis IV. The five-segment solid rocket booster is the largest and most
powerful booster ever built for spaceflight.
Aerojet Rocketdyne, the RS-25 lead contractor, is readying the RS-25 engines
for the next three SLS flights after Artemis I. The engines have been tested
and will be integrated with their respective core stages closer to final
assembly. The engines for Artemis II are ready to go to NASA’s Michoud
Assembly Facility in New Orleans, where they’ll be integrated with the SLS
core stage. The Artemis III engines are being prepared for flight at Aerojet
Rocketdyne’s facility at NASA’s Stennis Space Center near Bay St. Louis,
Mississippi, and the company is already manufacturing engines for missions
beyond Artemis IV.
Each 212-foot-tall core stage is produced by Boeing at Michoud. The
factory’s 2.2-million-square-feet of manufacturing space and its
cutting-edge manufacturing equipment allow teams to build multiple rocket
stages at once. Currently, NASA and Boeing, the lead contractor for the SLS
core stage, are building core stages for Artemis II, Artemis III, and
Artemis IV at Michoud. In addition to the core stage, manufacturing at
Michoud has started on test articles for the Exploration Upper Stage (EUS)
that will power the Block IB configuration of the rocket starting with the
Artemis IV mission.
“New tooling has been installed at Michoud to build the Exploration Upper
Stage at the same time core stages are produced,” said Steve Wofford, NASA’s
manager for the SLS Block IB effort. The EUS will send 83,000 pounds to the
Moon, which is 40 percent more payload to orbit than the ICPS used on early
Artemis missions, and 70 percent more than any existing rocket.”
Crews from Teledyne Brown Engineering in Huntsville, Alabama, and Marshall
are manufacturing the cone-shaped launch vehicle stage adapters and Orion
stage adapters for Artemis II and Artemis III. The adapters serve as vital
connection points for the core and ICPS and Orion spacecraft. For missions
beyond Artemis III, the universal stage adapter will connect the EUS to the
Orion spacecraft and act as a payload storage compartment, accommodating
large payloads, such as logistics modules or other exploration spacecraft.
Engineers at RUAG Space USA completed panels for a universal stage adapter
test article and delivered the panels to Dynetics in Huntsville, Alabama,
the lead contractor for the adapter, that is assembling the test article in
preparation for tests later in 2022.
With Artemis, NASA will land the first woman and the first person of color
on the lunar surface and establish long-term exploration at the Moon in
preparation for human missions to Mars. SLS and NASA’s Orion spacecraft,
along with the human landing system and the Gateway in orbit around the
Moon, are NASA’s foundation for deep space exploration.
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