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

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

SACRAMENTO, Calif., June 18, 2013 (GLOBE NEWSWIRE) -- Aerojet Rocketdyne, a
GenCorp (NYSE:GY) company, announced that it completed its first Block IIA
Throttling Divert and Attitude Control System (TDACS) fully-integrated flight
weight system hot fire test for the Standard Missile-3 (SM-3) Block IIA
program. The SM-3 program is managed by the Missile Defense Agency (MDA) and
by prime contractor Raytheon Missile Systems.

This first of several SM-3 Block IIA TDACS development and qualification units
was altitude tested at Aerojet Rocketdyne's Sacramento, Calif., headquarters.
The unit was exposed to representative thermal and mechanical environmental
extremes prior to the hot fire test. The success of this test validates that
Aerojet Rocketdyne's unique throttling solid propulsion technology can be
successfully scaled up in size and operate in all expected environments.

"The SM-3 IIA TDACS builds on the successful design and lessons learned of the
SM-3 IB TDACS," said Michael Bright, vice president of Aerojet Rocketdyne's
Missile Defense and Strategic Systems Business Unit. "Because of the SM-3 IB
experience, we have a more efficient design process and improved testing
efficiency, and will be able to move into production faster. Reaching this
test milestone on schedule is an important validation of our approach."

"This successful test reflects the significant engineering discipline and
technical excellence used to develop Aerojet Rocketdyne's TDACS products,"
said Marvin Young, vice president of Engineering.

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, developed as an SM-3 Cooperative Development Program with
Japan's Ministry of Defense (MOD), as part of MDA's Aegis Ballistic Missile
Defense System 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.

About Aerojet Rocketdyne

Aerojet Rocketdyne is a world-recognized aerospace and defense leader
providing propulsion and energetics to the space, missile defense, strategic,
tactical missile and armaments sectors for both domestic and international
markets. Find out more about the new Aerojet Rocketdyne at

CONTACT: Glenn Mahone, Aerojet Rocketdyne, 202.302.9941
         Kristin Conner, Aerojet Rocketdyne, 916.355.2143

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