Aerojet Rocketdyne SM-3 Block IIA TDACS Completes Second Full System Hot Fire Testing

Aerojet Rocketdyne SM-3 Block IIA TDACS Completes Second Full System Hot Fire
Testing

SACRAMENTO, Calif., Aug. 29, 2013 (GLOBE NEWSWIRE) -- Aerojet Rocketdyne, a
GenCorp (NYSE:GY) company, announced that it completed its second Throttling
Divert and Attitude Control System (TDACS) fully-integrated flight weight
system hot fire test for the Standard Missile-3 (SM-3) Block IIA guided
missile program. The SM-3 program is managed by the Missile Defense Agency
(MDA) with Raytheon Missile Systems as the prime contractor.

This second of several SM-3 Block IIA TDACS development and qualification
units was altitude tested at Aerojet Rocketdyne's Sacramento headquarters. The
success of this test demonstrates the readiness of the SM-3 Block IIA TDACS
design for the upcoming Critical Design Review (CDR).

"The fact that we had two successful hot fire tests in two months demonstrates
the maturity of the design," said Dave Parker, executive director for SM-3
Programs for Aerojet Rocketdyne's Missile Defense and Strategic Systems
Business Unit. "Using lessons learned from the SM-3 Block IB guided missile
program, we used a hardware-rich development program for critical risk
reduction testing, and utilized production-level drawings integrated and
assembled by the technicians that would be doing the work. These two
adjustments greatly accelerated the transition to manufacturing and allowed us
to achieve the affordability goals established at the beginning of the
program. So far the approach is working -- our upcoming CDR will be the
complete validation of that approach."

The SM-3 Block IIA TDACS is being developed at Aerojet Rocketdyne's Sacramento
facility, where the SM-3 Block IB TDACS also is produced. SM-3 Block IIA
guided missile, developed as a SM-3 Cooperative Development Program with
Japan's Ministry of Defense (MOD), as part of the European Phased Adaptive
Approach, uses hit-to-kill technology to destroy targets, and is designed to
engage threat ballistic missiles outside of the Earth's atmosphere during the
mid-course phase of an incoming missile.

Aerojet Rocketdyne is a world-recognized aerospace and defense leader
providing propulsion and energetics to the space, missile defense, strategic,
tactical missile, and armaments areas in support of domestic and international
markets. GenCorp is a diversified company providing innovative solutions to
its customers in the aerospace and defense, energy and real estate markets.
Additional information about Aerojet Rocketdyne and GenCorp can be obtained by
visiting the companies' websites at www.Rocket.com and www.GenCorp.com.

CONTACT: Glenn Mahone, Aerojet Rocketdyne, 202.302.9941
         Glenn.Mahone@Rocket.com
         Kristin Conner, Aerojet Rocketdyne, 916.355.2143
         Kristin.Conner@Rocket.com

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