NGL System Achieves Critical Milestone With Completion Of Structural Acceptance Test Orbital ATK has successfully completed an important milestone in developing advanced solid rocket propulsion and other technologies to be used in a new generation of intermediate- and large-class space launch vehicles. The company is in early production of development hardware for its Next Generation Launch (NGL) system, and on October 27 successfully completed the structural acceptance test on the first motor high-strength composite case for this program.
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