Orbital ATK Technologies Support ULA Delta IV Launch of NROL-47 Spacecraft
Company Provided Solid Rocket Motors, Large Composite Structures and Other Critical Components for the Launch Vehicle

Dulles, Virginia 12 January 2018 – Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, played an integral role in the successful launch of a United Launch Alliance Delta IV rocket from Vandenberg Air Force Base, California, today. The rocket launched a national security payload, designated NROL-47, for the U.S. National Reconnaissance Office (NRO) in support of a national defense mission. Orbital ATK’s contributions to the Delta IV include cutting-edge technologies from across the company, including two Graphite Epoxy Motors (GEM 60), large composite structures and the propellant tank and nozzle for the main engine.

"Orbital ATK is proud to support the NRO and ULA with key technologies that enable the launch of critical national defense satellites," said Charlie Precourt, Vice President and General Manager of Orbital ATK’s Propulsion Systems Division.

Orbital ATK provided two 60-inch diameter Graphite Epoxy Motors (GEM 60) for the Delta IV rocket. The 53-foot-long solid rocket boosters burned for 90 seconds and provided more than 560,000 pounds of thrust. Orbital ATK produced the solid rocket motors at its facilities in Magna and Clearfield, Utah, where it has manufactured GEM-60s for the Delta IV launch vehicle since the initial flight in 2002. Beginning in 2019, Orbital ATK will provide upgraded GEM 60 solid rocket boosters, designated GEM 63 and GEM 63XL, for ULA’s Atlas V and new Vulcan launch vehicles, respectively.

Orbital ATK also supplied seven Delta IV key composite structures, which provide lower weight and higher performance. The largest composite structures are five meters in diameter, range from one to eight meters in length, and are produced at Orbital ATK’s Aerospace Structures Division manufacturing facilities in Iuka, Mississippi.

“Another successful Delta IV launch is testament to our highly engineered composite structures, unwavering commitment and exceptional teamwork to ensure dependable access to space and affordable innovation in delivering this critical asset for our nation’s security,” said Steve Earl, Vice President and General Manager of Orbital ATK’s Aerospace Structures Division.

Additionally, Orbital ATK manufactured the propellant tank for the Delta IV upper stage roll control system at the company’s Commerce, California, facility, and designed and manufactured the nozzle for the Delta IV’s RS-68A engine at its Promontory, Utah, facility. Orbital ATK also designed and produced the nozzle’s thermal protection material, which is capable of shielding the nozzle from external temperatures that can exceed 4,000 degrees Fahrenheit during launch.

About Orbital ATK

Orbital ATK is a global leader in aerospace and defense technologies. The company designs, builds and delivers space, defense and aviation systems for customers around the world, both as a prime contractor and merchant supplier. Its main products include launch vehicles and related propulsion systems; missile products, subsystems and defense electronics; precision weapons, armament systems and ammunition; satellites and associated space components and services; and advanced aerospace structures. Headquartered in Dulles, Virginia, Orbital ATK employs approximately 13,000 people across the United States and in several international locations. For more information, visit
www.orbitalatk.com.

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Media Contact
Kay Anderson
(435) 230-2787
kay.anderson@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com
Media Contact
Kay Anderson
(435) 230-2787
kay.anderson@orbitalatk.com
Investor Contact
Barron Beneski
(703) 406-5528
barron.beneski@orbitalatk.com