Christmas came early last week for Aerojet Rocketdyne, Northrop Grumman and Orbital ATK as the U.S. Air Force awarded rocket propulsion contracts worth a combined $14.5 million to the companies on Dec. 23. The contracts support “technology maturation and risk reduction” in the areas of material manufacturing and development and advanced technologies. The work supports the effort to transition away from the use of Russian-built RD-180 engines in United Launch […]