Artemis I Update: Engine Controller Resolution, Closeout Tasks Continue

Inside High Bay 3 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the work platforms have been retracted from around the Artemis I Space Launch System on Sept. 20, 2021. All 10 levels of platforms were extended and retracted as part of an umbilical test. During the test, several umbilical arms on the mobile launcher were extended to connect to the SLS rocket. They swung away from the launch vehicle, just as they will on launch day. NASA and Jacobs teams will continue conducting tests inside the VAB before transporting the Orion spacecraft to the assembly building and stacking it atop the SLS, completing assembly of the rocket for the Artemis I mission. Artemis I will be the first integrated test of the SLS and Orion spacecraft. In later missions, NASA will land the first woman and the first person of color on the surface of the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.
Inside High Bay 3 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the work platforms have been retracted from around the Artemis I Space Launch System on Sept. 20, 2021. All 10 levels of platforms were extended and retracted as part of an umbilical test. During the test, several umbilical arms on the mobile launcher were extended to connect to the SLS rocket. They swung away from the launch vehicle, just as they will on launch day. NASA and Jacobs teams will continue conducting tests inside the VAB before transporting the Orion spacecraft to the assembly building and stacking it atop the SLS, completing assembly of the rocket for the Artemis I mission. Photo credit: NASA/Frank Michaux

Since replacing an engine controller on RS-25 engine number four that is on the Space Launch System (SLS) rocket core stage, NASA, and lead engines contractor Aerojet Rocketdyne, have performed a series of tests to ensure the engines and controllers are ready to support the Artemis I mission.  All four engine controllers performed as expected during power up, as part of the Artemis I Core Stage engineering tests.

Aerojet Rocketdyne and its manufacturer of the engine flight controller, conducted numerous tests on the faulty engine four controller and determined the cause to be a faulty memory chip. The device is used only during the controller start-up sequence and has no impact on controller operations beyond that point. There is no indication of faulty memory chips on the other three engines, and therefore no related constraints to the wet dress rehearsal or launch.

Kennedy teams are completing remaining SLS pre-flight diagnostic tests and hardware closeouts, including testing the flight termination system on the SLS and installing instrumentation on the twin solid rocket boosters, in advance of rolling the rocket and spacecraft to Launch Pad 39B for the first time next month for a final test before launch. This final test, known as the wet dress rehearsal, will run the launch team through operations to load propellant into the rocket’s tanks and conduct a full launch countdown.

During the test at the launch pad, engineers will be on duty in the Launch Control Center and in other stations where they will work during the Artemis I launch. They will capture as much data as possible on the performance of all the systems that are part of SLS and the Orion spacecraft as well as the Kennedy ground systems. NASA will set a target launch date after a successful wet dress rehearsal test.

Artemis I Update

Mobile Launcher outside the Vehicle Assembly Building.
The mobile launcher for the Artemis I mission, atop crawler-transporter 2, arrives at the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in Florida on Oct. 30, 2020. The agency will roll the combined Space Launch System (SLS) rocket and Orion spacecraft out of the VAB atop crawler-transporter 2 to Launch Pad 39B at the NASA’s Kennedy Space Center in Florida for testing no earlier than March 2022. Photo credit: NASA/Kim Shiflett

NASA has updated the schedule to move the combined Space Launch System rocket and Orion spacecraft out of the Vehicle Assembly Building (VAB) to Launch Pad 39B at the agency’s Kennedy Space Center in Florida for testing to no earlier than March 2022.

NASA has added additional time to complete closeout activities inside the VAB prior to rolling the integrated rocket and spacecraft out for the first time. While the teams are not working any major issues, engineers continue work associated with final closeout tasks and flight termination system testing ahead of the wet dress rehearsal.

Teams are taking operations a step at a time to ensure the integrated system is ready to safely launch the Artemis I mission. NASA is reviewing launch opportunities in April and May.

Artemis I Core Stage Engineering Testing Complete

This week, engineers and technicians successfully completed an engineering test series of the Space Launch System (SLS) rocket core stage inside the Vehicle Assembly Building at NASA’s Kennedy Space Center as part of the integrated testing before launch.

After replacing and testing one of four RS-25 engine controllers, the team conducted several tests to ensure the massive core stage is ready to roll to the launch pad for the wet dress rehearsal ahead of the Artemis I launch. Engineers and technicians tested communication between the flight computers and other core stage systems and slightly moved the engines to practice the gimbaling they will experience during flight.

All four engine controllers were powered up and performed as expected as part of the Artemis I Core Stage engineering tests. Following the power up, engineers successfully performed diagnostic tests on each controller.

Up next, the team will conduct a second countdown sequencing test to demonstrate the ground launch software and ground launch sequencer, which checks for health and status of the vehicle while at the pad. The simulated launch countdown tests the responses from SLS and the Orion spacecraft, ensuring the sequencer can run without any issues. After the countdown test and final closeouts are complete, SLS and Orion will head to the launch pad for the first time to complete the wet dress rehearsal test.

Lift Underway to Top Mega-Moon Rocket with Orion Spacecraft

Orion lifted atop SLS rocket in the VAB
Photo Credit: Chad Siwik

Final stacking operations for NASA’s mega-Moon rocket are underway inside the Vehicle Assembly Building at NASA’s Kennedy Space Center as the Orion spacecraft is lifted onto the Space Launch System (SLS) rocket for the Artemis I mission. Engineers and technicians with Exploration Ground Systems (EGS) and Jacobs attached the spacecraft to one of the five overhead cranes inside the building and began lifting it a little after midnight EDT.

Next, teams will slowly lower it onto the fully stacked SLS rocket and connect it to the Orion Stage Adapter. This will require the EGS team to align the spacecraft perfectly with the adapter before gently attaching the two together. This operation will take several hours to make sure Orion is securely in place.

NASA will provide an update once stacking for the Artemis I mission is complete.

Release and Retract Test Marks Artemis I Mission Milestone

A close-up view of the Artemis I Space Launch System rocket inside High Bay 3 of the Vehicle Assembly Building at Kennedy Space Center in Florida.
A close-up view of the Artemis I Space Launch System rocket inside High Bay 3 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on Sept. 20, 2021. All 10 levels of work platforms have been retracted from around the rocket as part of the umbilical release and retract test. During the test, several umbilical arms on the mobile launcher were extended to connect to the SLS rocket and then swung away from the launch vehicle, just as they will on launch day. Artemis I will be the first integrated test of the SLS and Orion spacecraft. In later missions, NASA will land the first woman and the first person of color on the surface of the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars. Photo credit: NASA/Frank Michaux

Engineers with Exploration Ground Systems and contractor Jacobs successfully completed the Umbilical Release and Retract Test on Sept. 19 inside the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center in preparation for the Artemis I mission.

The umbilicals will provide power, communications, coolant, and fuel to the rocket and the Orion spacecraft while at the launch pad until they disconnect and retract at ignition and liftoff.

“Previous testing at the Launch Equipment Test Facility and in the VAB refined our designs and processes and validated the subsystems individually, and for Artemis I, we wanted to prove our new systems would work together to support launch,” said Jerry Daun, Jacobs Arms and Umbilical Systems Operations Manager.

During the test, several umbilical arms extended to connect the Space Launch System (SLS) rocket and the mobile launcher. They swung away from the rocket, just as they will on launch day.

“This test is important because the next time these ground umbilical systems are used will be the day of the Artemis I launch,” said Scott Cieslak, umbilical operations and testing technical lead.

Teams will continue conducting tests inside the VAB before transporting the Orion spacecraft to the assembly building and stacking it atop the SLS, completing assembly of the rocket for the Artemis I mission.

“It was a great team effort to build, and now test, these critical systems,” said Peter Chitko, arms and umbilicals integration manager. “This test marked an important milestone because each umbilical must release from its connection point at T-0 to ensure the rocket and spacecraft can lift off safely.”

Artemis I will be the first integrated test of the SLS and Orion spacecraft. In later Artemis missions, NASA will land the first woman and the first person of color on the surface of the Moon, paving the way for a long-term lunar presence and serving as a steppingstone on the way to Mars.

Orion Spacecraft Goes ‘Shields Up’ for Artemis I

The four ogive fairings for the Orion Artemis I mission are installed on the launch abort system assembly inside the Launch Abort System Facility at NASA's Kennedy Space Center in Florida on Aug. 20, 2021.
The four ogive fairings for the Orion Artemis I mission are installed on the launch abort system assembly inside the Launch Abort System Facility at NASA’s Kennedy Space Center in Florida on Aug. 20, 2021. Photo credit: NASA/Kim Shiflett

Teams at NASA’s Kennedy Space Center in Florida are putting the final touches on the Orion spacecraft for the Artemis I mission by connecting the ogive fairings for the launch abort system (LAS) assembly.  Pronounced oh-jive, the ogive fairings consist of four protective panels, and their installation will complete the LAS assembly.

Technicians and engineers from the center’s Exploration Ground Systems and contractor Jacobs recently finished attaching the launch abort tower to the top of the Orion crew module. They then began lifting and mating the lightweight fairings, which will shield the crew module from the severe vibrations and sounds it will experience during launch. One of the fairing panels has a hatch to allow access to the crew module before launch.

During Artemis missions, the 44-foot-tall LAS will detach from the spacecraft when it is no longer needed, shortly after launching on the Space Launch System (SLS) rocket, to lighten the journey to the Moon. Although the abort motors will not be active on the uncrewed Artemis I flight test, the system is intended to protect astronauts on future missions if a problem arises during launch or ascent by pulling the spacecraft away from a failing rocket.

Once LAS installation is complete, the spacecraft will leave the Launch Abort System Facility and continue on its path to the pad, making its way to the spaceport’s Vehicle Assembly Building to be integrated with the SLS rocket ahead of the launch.

Orion Points at the Moon with Launch Abort Tower

Teams with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs integrated the launch abort system (LAS) with the Orion spacecraft inside the Launch Abort System Facility at NASA’s Kennedy Space Center in Florida on July 23, 2021.
Teams with NASA’s Exploration Ground Systems (EGS) and contractor Jacobs integrated the launch abort system (LAS) with the Orion spacecraft inside the Launch Abort System Facility at NASA’s Kennedy Space Center in Florida on July 23, 2021. Photo credit: NASA/Kim Shiflett

Ahead of the Artemis I lunar-bound mission, teams at NASA’s Kennedy Space Center joined the launch abort tower to the Orion spacecraft on July 23. Working inside the spaceport’s Launch Abort System Facility, engineers and technicians with Exploration Ground Systems and primary contractor, Jacobs, lifted the system above the spacecraft and coupled it with the crew module.

The launch abort system is designed to protect astronauts if a problem arises during launch by pulling the spacecraft away from a failing rocket. Although there will be no crew Artemis I, the launch abort system will collect flight data during the ascent to space and then jettison from the spacecraft.

Next, teams will install four ogives – the protective panels that shield the upper portion of the spacecraft during its entry into orbit. Once final checkouts are complete, Orion will be integrated with the Space Launch System rocket.

Teams Add Launch Abort System to Ready Orion for Artemis I

NASA's Orion spacecraft
The Orion spacecraft for the Artemis I mission arrives at Kennedy Space Center’s Launch Abort System facility on July 10, 2021, after being transported from the Florida spaceport’s Multi-Payload Processing Facility earlier in the day. Photo credit: NASA/Cory Huston

The Orion spacecraft for the Artemis I mission recently completed fueling and servicing checks while inside the Multi-Payload Processing Facility at NASA’s Kennedy Space Center in Florida. The capsule has now made it to its next stop on the path to the pad – the spaceport’s Launch Abort System Facility.

Crowning the spacecraft with its aerodynamic shape, the launch abort system is designed to pull crew away to safety from the Space Launch System (SLS) rocket in the event of an emergency during launch. This capability was successfully tested during the Orion Pad Abort and Ascent Abort-2 tests and approved for use during crewed missions.

Teams with Exploration Ground Systems and contractor Jacobs will work to add parts of the launch abort system onto the spacecraft. Technicians will install four panels that make up the fairing assembly and protect the spacecraft from heat, air, and acoustic environments during launch and ascent. A launch tower will top the fairing assembly to house the pyrotechnics and a jettison motor. The system will also be outfitted with instruments to record key flight data for later study.

With successful demonstration of the system during previous tests, the abort motor that pulls the spacecraft away from the rocket and attitude control motor that steers the spacecraft for a splashdown during an abort will not be functional for the uncrewed Artemis I mission. The jettison motor will be equipped to separate the system from Orion in flight once it is no longer needed, making Orion thousands of pounds lighter for the journey to the Moon.

Once the system’s integration is complete, teams will transport the spacecraft to the center’s Vehicle Assembly Building. There, it will join the already stacked flight hardware and be raised into position atop the SLS rocket, marking the final assembly milestone for the  Artemis rocket.

Launching in 2021, Artemis I will be a test of the Orion spacecraft and SLS rocket as an integrated system ahead of crewed flights to the Moon. Under Artemis, NASA aims to land the first woman and first person of color on the Moon and establish long-term lunar exploration.

View additional photos here.

Backbone of NASA’s Moon Rocket Joins Boosters for Artemis I Mission

Space Launch System core stage
Teams with NASA’s Exploration Ground Systems and contractor Jacobs lower the Space Launch System (SLS) core stage – the largest part of the rocket – onto the mobile launcher, in between the twin solid rocket boosters, inside High Bay 3 of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida on June 12, 2021. Photo credit: NASA/Cory Huston

Leerlo en español aquí

The core stage of the Space Launch System (SLS) rocket for NASA’s Artemis I mission has been placed on the mobile launcher in between the twin solid rocket boosters inside the Vehicle Assembly Building (VAB) at NASA’s Kennedy Space Center. The boosters attach at the engine and intertank sections of the core stage. Serving as the backbone of the rocket, the core stage supports the weight of the payload, upper stage, and crew vehicle, as well as carrying the thrust of its four engines and two five-segment solid rocket boosters.

After the core stage arrived on April 27, engineers with Exploration Ground Systems and contractor Jacobs brought the core stage into the VAB for processing work and then lifted it into place with one of the five overhead cranes in the facility.

Once the core stage is stacked alongside the boosters, the launch vehicle stage adapter, which connects the core stage to the interim cryogenic propulsion stage (ICPS), will be stacked atop the core stage and quickly followed by the ICPS.

Artemis I will be an uncrewed test of the Orion spacecraft and SLS rocket as an integrated system ahead of crewed flights to the Moon. Under the Artemis program, NASA aims to land the first woman and first person of color on the Moon in 2024 and establish sustainable lunar exploration by the end of the decade.

Under Pressure! New Rainbird System Will Protect Artemis II

Water spraying out of a nozzle for rainbird testing for the Artemis II mission.
Water flows through a small-scale, 3D-printed nozzle during prototype testing of a new rainbird system on March 24, 2021, at NASA’s Kennedy Space Center in Florida. Photo credit: NASA/Ben Smegelsky

As NASA prepares for the uncrewed Artemis I test flight, teams at the agency’s Kennedy Space Center are also hard at work getting ready for the Artemis II mission that will send astronauts on a trip around the Moon ahead of a crewed lunar landing.

Water flows through large nozzles during rainbird testing for the Artemis II mission.
Teams with NASA’s Exploration Ground Systems and supporting contractors conduct prototype testing of a new rainbird system at the agency’s Kennedy Space Center in Florida on March 24, 2021, that can be used for the crewed Artemis II mission to the Moon. Photo credit: NASA/Ben Smegelsky

This includes assessing a new prototype “rainbird” system designed to protect the mobile launcher – as well as NASA’s Space Launch System (SLS) – when the engines roar to life. The March 24 tests included running various water pressures through small-scale, 3D-printed nozzles to capture data that can be used to develop full-scale hardware.

The rainbirds will release enough water to fill 40 swimming pools in 40 seconds. This massive volume will help absorb the heat and energy when SLS, the most powerful rocket the agency has ever built, lifts off with the Orion spacecraft from Kennedy’s Launch Pad 39B.

While upgraded rainbirds – large-scale water nozzles – have already been tested and installed on the mobile launcher for the Artemis I launch, Exploration Ground Systems (EGS) found room for improvement. This led teams from EGS and supporting contractors to start testing another prototype system to distribute water more evenly to maximize performance ahead of the Artemis II launch.

Water flows through a nozzle during rainbird testing for the Artemis II mission.
Alongside the iconic Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, teams with the agency’s Exploration Ground Systems and supporting contractors conduct prototype testing of a new rainbird system on March 24, 2021. Photo credit: NASA/Ben Smegelsky

“By running our prototype through a range of pressures, we can simulate what each of the rainbirds will see on the mobile launcher on launch day and have a better understanding of how they will perform when we scale them back up to full size,” said Dave Valletta, a design engineer at Kennedy working on the ignition overpressure protection and sound suppression (IOPSS) system.

A critical piece of the IOPSS system, the rainbird got its name decades ago when space shuttle developers noted that it looked like a garden sprayer.

“When we saw the pattern of the water discharge during the first test flow in the shuttle program, it reminded us of your common lawn sprinkler, only it did not rotate and was 100 times the size,” said Jerry Smith, a design engineer for mechanical-fluid systems at Kennedy.

Once prototype testing is complete, allowing better prediction of future spray patterns, the team will move forward with designing a preferred concept. That concept will be built and installed on the mobile launcher to undergo verification and validation testing, where the newly installed nozzles will be fully integrated with the launch pad to ensure they work as expected.

“The confidence check gained from these tests will lead us to developing full-scale nozzles for the mobile launcher,” said Gerald Patterson, IOPSS and fire suppression system operations engineer and test lead. “Once installed, they’ll provide more efficient water distribution across the deck and, ultimately, better protection to ground systems, the SLS rocket, and its crew for Artemis II and beyond.”