ATK Chill-Tests Delta IV Strap-On With New Nozzle

CHILL TEST: Results of a cold-temperature hot-fire test have qualified a new fixed nozzle for ATK’s GEM-60 strap-on solid-fuel booster for the United Launch Alliance Delta IV, as ATK continues to upgrade the 12-year-old design. In a test Sept. 6 at the ATK facility in Promontory, Utah, the 53-ft...

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