据NASA官网2017年8月3日报道,SLS五段式固体助推器发动机制造工作进展顺利,四个部段已浇注完毕。之后,NASA将对已浇注部段开展无损评估,并在壳体外表面喷涂黑白棋盘状摄影测量标记。发动机部段最终将运往肯尼迪航天中心与前裙和尾裙结构集成,安装在芯级两侧。助推器壳体上的黑白棋盘状摄影测量标记将作为 According to the NASA website reported on August 3, 2017, SLS five-stage solid booster engine manufacturing progressing smoothly, four sections have been completed. NASA will then conduct a nondestructive evaluation of the cast section and a black and white checkerboard photogrammetric mark on the outer surface of the shell. The engine section will eventually be shipped to the Kennedy Space Center for integration with the front skirt and tail skirt and mounted on either side of the core. The black and white checkerboard photogrammetric marks on the booster housing will act as