Northrop Grumman has announced that it is preparing GEM 63XL rocket boosters to support United Launch Alliance’s Vulcan Centaur rocket on the United States Space Force national security missions. According to a recent corporation news release, Northrop Grumman conducted a validation ground test of an extended length 63-inch-diameter Graphite Epoxy Motor (GEM 63XL) in Promontory. […]