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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA completed a full duration, 650-second hot fire of the RS-25 certification engine Nov. 29, continuing a critical test series to support future SLS (Space Launch System) missions to deep space as NASA explores the secrets of the universe for the benefit of all. Danny Nowlin NASA completed a full duration, 650-second hot fire of the RS-25 certification engine Nov. 29, continuing a critical test series to support future SLS (Space Launch System) missions to deep space as NASA explores the secrets of the universe for the benefit of all. Danny Nowlin NASA completed a full duration, 650-second hot fire of the RS-25 certification engine Nov. 29, continuing a critical test series to support future SLS (Space Launch System) missions to deep space as NASA explores the secrets of the universe for the benefit of all. Danny Nowlin NASA conducted the third RS-25 engine hot fire in a critical 12-test certification series Nov. 29, demonstrating a key capability necessary for flight of the SLS (Space Launch System) rocket during Artemis missions to the Moon and beyond.
NASA is conducting the series of tests to certify new manufacturing processes for producing RS-25 engines for future deep space missions, beginning with Artemis V. Aerojet Rocketdyne, an L3Harris Technologies Company and lead engines contractor for the SLS rocket, is incorporating new manufacturing techniques and processes, such as 3D printing, in production of new RS-25 engines.
Crews gimbaled, or pivoted, the RS-25 engine around a central point during the almost 11-minute (650 seconds) hot fire on the Fred Haise Test Stand at NASA’s Stennis Space Center near Bay St. Louis, Mississippi. The gimbaling technique is used to control and stabilize SLS as it reaches orbit.
During the Nov. 29 test, operators also pushed the engine beyond any parameters it might experience during flight to provide a margin of operational safety. The 650-second test exceeded the 500 seconds RS-25 engines must operate to help power SLS to space. The RS-25 engine also was fired to 113% power level, exceeding the 111% level needed to lift SLS to orbit.
The ongoing series will stretch into 2024 as NASA continues its mission to return humans to the lunar surface to establish a long-term presence for scientific discovery and to prepare for human missions to Mars.
Four RS-25 engines fire simultaneously to generate a combined 1.6 million pounds of thrust at launch and 2 million pounds of thrust during ascent to help power each SLS flight. NASA and Aerojet Rocketdyne modified 16 holdover space shuttle main engines, all proven flightworthy at NASA Stennis, for Artemis missions I through IV.
Every new RS-25 engine that will help power SLS also will be tested at NASA Stennis. RS-25 tests at the site are conducted by a combined team of NASA, Aerojet Rocketdyne, and Syncom Space Services operators. Syncom Space Services is the prime contractor for Stennis facilities and operations.
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Last Updated Nov 29, 2023 EditorNASA Stennis CommunicationsContactC. Lacy Thompsoncalvin.l.thompson@nasa.gov / (228) 688-3333LocationStennis Space Center Related Terms
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Article 2 weeks ago 2 min read NASA Conducts 1st Hot Fire of New RS-25 Certification Test Series
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By NASA
On the left, NASA Ames engineer Evan Kawamura on his first day of sixth grade with teacher Kristen Stoker of Hanalani Schools. On the right, Kawamura reunited with Mrs. Stoker when speaking to her students about his work at NASA. The field of aerial vehicle autonomy focuses on self-reliance, building the flight equivalent of puppets without puppeteers. Behind the scenes, however, is a rich network of people and systems that work together to develop frameworks, test new technologies, and inspire a pipeline of engineers to create the breakthroughs of the future. Encouraging kids to dream big and pursue their STEM passions is especially important to Evan Kawamura, a guidance, navigation and control engineer in the Intelligent Systems Division at NASA’s Ames Research Center in California’s Silicon Valley.
Kawamura takes mentorship and STEM outreach as seriously as his work in unmanned aerial vehicles (UAVs) and Advanced Air Mobility (AAM). He extends his duty as an engineer from his office to classrooms across Oahu, Hawaii, where he lives. He has led drone-building workshops, presented about his journey to NASA, and connected with hundreds of students and educators. Most recently, Kawamura returned to his alma mater and reunited with his sixth-grade teacher, Mrs. Kristen Stoker, to talk to her students about his work at NASA.
“Since my family, teachers, advisors, mentors, and professors provided me with wonderful opportunities and experiences that inspired and prepared me for engineering, I feel that it’s crucial to continue to inspire the next generation,” he said. “If we do not protect, inspire, and educate our children, then the future is dark and uncertain.”
Evan Kawamura, computer guidance, navigation, and control engineer, with two hexacopters in the NASA Unmanned Aircraft System Autonomy Research Complex.Credit: NASA/Dominic Hart Kawamura writes code that helps aerial vehicles launch, fly, and land without intervention from human operators. One of his early proud moments was in the summer of 2019 when, with the help of his team lead and mentor, Corey Ippolito of NASA Ames’ Airborne Science Program, he successfully programmed a six-propellered hexacopter to launch from and return to a defined point in space without a human driver.
“It was very rewarding and fulfilling to see our efforts pay off both in simulation and in a real world flight test,” Kawamura said. “The work also became the baseline autonomy code for others on our team and my graduate school research too, so I felt a lot of pressure during development but a huge relief when it worked.”
Kawamura comes from a long line of builders and engineers, back to his boatbuilding great-great- grandfather who moved to Hawaii from Japan in 1909 with his nine-year-old son. Evan’s father, a software engineer, bought him science and engineering books, and entertained endless questions about how things work. His grandfather, a contractor who built the house Evan’s dad grew up in, was a fan of origami and spent countless hours teaching Evan to fold boats and planes. His family inspired in him a fascination for the ways different materials could fit together like trains and LEGO to make something new, but sometimes he didn’t get to play with his creations.
“I got excited to create a battle with all the paper planes and boats my grandpa and I made,” Kawamura said. “But he fell asleep before we could start playing.”
The cool and strange thing is that I see the aloha spirit at NASA Ames, which was one of the main reasons that made me want to work at NASA.
Evan kawamura
NASA Engineer
Kawamura joined Ames as an intern while getting his PhD at University of Hawaii at Manoa. He completed his first internship in 2018, returned in the spring of 2019, and accepted a NASA Pathways internship later that summer. In 2021, Kawamura converted to a remote full-time employee at Ames. All along the way, he relied on the guidance and support of his family, mentors, and teammates. That experience drives him to pay forward the inspiration and encouragement that helped him get where he is today.
“Growing up in Hawaii fosters a ‘togetherness’ mindset that is very inclusive and family-oriented,” he said. “Helping others, sharing burdens, and having each other’s backs opens channels of communication to build friendships and foster collaboration, which is what aloha is all about. The cool and strange thing is that I see the aloha spirit at NASA Ames, which was one of the main reasons that made me want to work at NASA.”
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By jensen
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