ATK and NASA have had to postpone the upcoming ground test of the Qualification Motor (QM)-1 due to one of the segments not meeting testing criteria. As such, it will not be used for the next hot-fire test, which takes place in the Utah desert. AmericaSpace spoke with ATK representatives to learn what was at the heart of this issue.
“One segment of the Space Launch System (SLS) Qualification Motor (QM)-1 ground test booster did not meet test criteria and will not be used for the next hot-fire test, “ said ATK’s Trina Helquist. “During routine X-ray inspection that followed the casting of the propellant, un-bonds and voids were found. Un-bonds are areas where the propellant did not adhere to the insulation/lining of the case. A void in this situation is an air pocket in the propellant.”