
PROMONTORY, Utah, Jan. 21, 2021 (Northrop Grumman PR) – Northrop Grumman Corporation (NYSE: NOC) conducted a validation ground test of an extended length 63-inch-diameter Graphite Epoxy Motor (GEM 63XL) today in Promontory. This variation of the company’s GEM 63 strap-on booster was developed in partnership with United Launch Alliance (ULA) to provide additional lift capability to the Vulcan Centaur rocket.
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