Aerojet's AJ26 Flight Engine Delivers Successful Hot Fire Test for Orbital's Taurus II Space Launch Vehicle

SACRAMENTO, Calif., Sept. 29, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today that along with NASA and Orbital Sciences Corporation (NYSE: ORB) (Orbital), the team conducted a successful ground test firing of an AJ26-62 flight engine that will power Orbital’s Taurus® II medium-class space launch vehicle. The test was conducted at NASA’s Stennis Space Center in Mississippi.

Aerojet Announces Milestone Reached with EPA Order

SACRAMENTO, Calif., Sept. 28, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today that on Sept. 20, 2011, the United States Environmental Protection Agency (EPA) issued a Unilateral Administrative Order to Aerojet to carry out remedial design and remedial action for the groundwater within the Perimeter Groundwater Operable Unit at Aerojet’s Sacramento, Calif. facility.

Aerojets Huntsville Office Expansion Aligns Company for Future Growth

SACRAMENTO, Calif. and HUNTSVILLE, Ala., Sept. 23, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today the expansion of its Huntsville offices to provide its local customers with additional engineering expertise, business development and program management support.

Aerojet Engine Helps Launch GRAIL Lunar Mission - Company’s thrusters to assist twin spacecraft with lunar orbit insertion

SACRAMENTO, Calif., Sept. 10, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced that its AJ10 engine successfully powered the second stage of today’s Delta II launch carrying a new generation of lunar exploration spacecraft.

Aerojet Completes Testing of SM-3 Blk IB TDACS

Aerojet, a GenCorp (NYSE: GY) company, announced that it accomplished several key developmental milestones on its Standard Missile-3 (SM-3) Blk IB Throttleable Divert and Attitude Control System (TDACS) by completing a series of full-up system performance tests.