Northrop Grumman tests 1st GEM 63XL motor – Satellite News Digest

Northrop Grumman Corporation (NOC) conducted its first ground test of an extended length 1.6-m diameter Graphite Epoxy Motor (GEM 63XL) in Promontory, Utah. 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 vehicle.

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