The GEM-63 and GEM-63XL have been developed as a response to SpaceX’s disruption of the space launch market, to help lower costs and increase performance for the ULA Atlas and Vulcan launch ...
Other components of Vulcan slated to fly before 2021 include the avionics, which are common to ULA’s Atlas V and Delta IV, and the GEM-63 solid rocket boosters. Northrop Grumman recently ...