DULLES, Va.--(BUSINESS WIRE)--Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, today announced it conducted a full-power "hot fire" test of the upgraded first stage propulsion system of its Antares medium-class rocket using new RD-181 main engines. The 30-second test took place at 5:30 p.m. (EDT) on May 31, 2016 at Virginia Space’s Mid-Atlantic Regional Spaceport (MARS) Pad 0A. Initial indications are that the test was fully successful. The Antares engineering team
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