Aerojet Technology Supported Today's Launch of the U.S. Air Force Orbital Test Vehicle

Aerojet Technology Supported Today's Launch of the U.S. Air Force Orbital Test
Vehicle

SACRAMENTO, Calif., Dec. 11, 2012 (GLOBE NEWSWIRE) -- Aerojet, a GenCorp
(NYSE:GY) company, announced that its rockets and thrusters were instrumental
in today's launch of the U.S. Air Force's orbital test vehicle.

The orbital test vehicle was launched aboard a United Launch Alliance (ULA)
Atlas V rocket. Eight Aerojet retro rockets also assisted with the Atlas
Centaur separation from the launch vehicle. In addition, 12 Aerojet
monopropellant (hydrazine) thrusters on the Atlas V Centaur upper stage
provided roll, pitch and yaw control, as well as settling burns for the upper
stage main engine. All Atlas launches since the late 1980s have included
Aerojet monopropellant reaction control thrusters on the Centaur upper stage.

Aerojet is under contract with ULA for the reaction control thrusters and
retro rockets for the Atlas V program. Aerojet's Redmond, Wash. team
manufactured the Centaur upper stage reaction control thrusters for ULA. The
retro rockets were designed and developed by Aerojet in Gainesville, Va. and
manufactured in Camden, Ark.

Aerojet 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 leading technology-based manufacturer of aerospace and defense
products and systems with a real estate segment that includes activities
related to the entitlement, sale, and leasing of the company's excess real
estate assets. Additional information about Aerojet and GenCorp can be
obtained by visiting the companies' websites at www.Aerojet.com and at
www.GenCorp.com.

The Aerojet logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=12048

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

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