Aerojet Rocketdyne Propulsion Supports Launch of Second MUOS Tactical Communication Satellite System Spacecraft

Aerojet Rocketdyne Propulsion Supports Launch of Second MUOS Tactical
Communication Satellite System Spacecraft

SACRAMENTO, Calif., July 19, 2013 (GLOBE NEWSWIRE) -- Aerojet Rocketdyne
propulsion systems played a major role in successfully placing the second of
five Mobile User Object System (MUOS-2) satellites into orbit today for the
U.S. Navy. The mission was launched from Cape Canaveral Air Force Station in
Florida aboard a United Launch Alliance (ULA) Atlas V rocket, with five
Aerojet Rocketdyne AJ60 Solid Rocket Boosters (SRBs), an RL10A-4-2 upper-stage
engine, and multiple spacecraft attitude control thrusters. Aerojet Rocketdyne
is a GenCorp (NYSE:GY) company.

"Aerojet Rocketdyne's diverse propulsion capabilities are critical to missions
like this, trusted to not only assist with delivering the spacecraft to its
final orbital destination, but also to keep it there, properly oriented, for
its full intended mission life," said Steve Bouley, vice president of Space
Launch Systems at Aerojet Rocketdyne. "Our record of mission success enables
assured placement of such a valuable payload like MUOS which is anticipated to
stay in service well past 2025."

"We are proud to be a long-time partner in ULA's Atlas V program and our team
is especially excited about this system's role in protecting and improving the
communications of our brave warfighters around the globe," said Peter Cova,
deputy, Space Launch Systems at Aerojet Rocketdyne. "This flight represents
Aerojet Rocketdyne from top to bottom, showcasing our products and
incorporating technologies from our various operating facilities around the
country."

"The proven reliability and success of the AJ60 Solid Rocket Boosters and the
RL10 provide a winning combination of rocket propulsion, and we are proud to
enable this technology that will support our troops at home and overseas,"
said Christine Cooley, RL10 program manager at Aerojet Rocketdyne."We
continue to invest in evolving the RL10 engine, paving the way for an
affordable engine that can sustain mission success and meet the fleet needs
well into the next decades."

The five AJ60 SRBs were ignited at lift off, increasing the launch thrust of
the Atlas V rocket by more than 1.9 million pounds. All Atlas V launches
requiring extra boost performance have flown Aerojet Rocketdyne-produced SRBs
and this particular flight includes the 49^th Aerojet Rocketdyne SRB delivered
to ULA last April.These motors have demonstrated a 100 percent success record
in flight, having now flown 17 missions over the past 10 years almost to the
day, since the first Atlas V launch with SRBs on July 17, 2003.

A single RL10A-4-2 engine delivers 22,300 pounds of thrust to power the Atlas
V upper-stage, burning cryogenic liquid hydrogen and liquid oxygen propellants
along the way. For more than 50 years, the RL10 has been one of the United
States' most reliable upper-stage engines, accumulating one of the most
impressive lists of accomplishments in the history of space propulsion. It has
played an integral role in placing numerous military, government and
commercial satellites into orbit, and powering space-probe missions to nearly
every planet in the solar system.

In addition to the five SRBs and upper-stage engine, 12 Aerojet Rocketdyne
monopropellant (hydrazine) thrusters in four modules on the Atlas V Centaur
upper stage provided roll, pitch and yaw control as well as settling burns for
the upper stage main engine. Once separated from the launch vehicle, MUOS-2
will use 12 MR-103G 0.2 lbf and six MR-106L 5 lbf thrusters for in-flight
maneuvers and final relocation.

Aerojet Rocketdyne manufactures the Atlas V Solid Rocket Boosters at its
Sacramento, Calif. facility.The two types of thrusters aboard MUOS were
designed and manufactured at Aerojet Rocketdyne's Redmond, Wash., facility.
The RL10 engine is designed and manufactured at Aerojet Rocketdyne's facility
in West Palm Beach, Fla.

Built by Lockheed Martin, MUOS-2 is a next-generation narrowband tactical
satellite communications system that will provide mobile U.S. forces with
reliable and secure global communication, including, for the first time,
simultaneous voice and data capabilities. The Navy's Program Executive Office
for Space Systems and its Communications Satellite Program Office are
responsible for the MUOS program. Lockheed Martin Space Systems Company is the
MUOS prime contractor and lead system integrator.

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
        
         Erin Dick, Aerojet Rocketdyne, 818-586-4977
         Erin.Dick@Rocket.com

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