BERLIN — A year after the launch of the Artemis 1 mission, NASA is continuing to study the performance of the heat shield on the Orion spacecraft, a review that may take several more months to complete.
Jim Free, NASA associate administrator for exploration systems development, said at a Nov. 17 meeting of the NASA Advisory Council’s human exploration and operations committee that Artemis 2 remained on schedule for launch on the Orion spacecraft’s first crewed mission late next year, but that NASA would not proceed until it was sure it understood the problem and made any changes.
In the months after Artemis 1, which splashed down last December after three and a half weeks in cislunar space, NASA managers said that they noted more erosion of the material on the heat shield than expected during reentry. They emphasized at the time that the erosion did not jeopardize the spacecraft because the heat shield still had a “significant amount of margin” of the ablative material, known as Avcoat.
Free said the heat shield was “the one thing that we’re still working through” from Artemis 1. He didn’t elaborate in his presentation what NASA was still studying with the heat shield and its performance on last year’s flight.
Lakiesha Hawkins, assistant deputy associate administrator in NASA’s Moon to Mars Program Office, said later in the meeting that NASA expected to get a “tentative root cause resolution” on the heat shield erosion late next spring. “We will make sure that all of us are comfortable with where they are with root cause before we start talking about flight rationale.”
She said engineers are looking at some of the factors that could have caused the loss of the Avcoat material during reentry. That included the “skip” reentry trajectory performed by Orion and material properties of Avcoat. Ground testing, she said, has been able to mimic the conditions seen on the heat shield during reentry.
NASA and its…
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