Engineers from two NASA field centers and the University of Texas have started subscale testing designed to ensure the acoustic loads generated by the planned heavy-lift Space Launch System (SLS) don’t damage the big rocket or its ground infrastructure during liftoff. With the initial flight of a first-generation SLS set for 2017, the U.S. space agency is using facilities at Marshall Space Flight Center, where the SLS program is managed, to collect data during brief hot-fire burns of ...

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