Aerojet Operates Japanese HAYABUSA Low Power Ion Engine

SACRAMENTO, Calif., April 6, 2011 – Aerojet, a GenCorp (NYSE: GY) company, and NEC Corporation (NEC; TSE: 6701) announced today that they have successfully operated a Japanese HAYABUSA low power microwave ion engine at Aerojet’s facility in Redmond, Wash.

Aerojet Hires Michael J. Bender as Executive Director, Advanced Programs

SACRAMENTO, Calif., April 4, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced that Michael J. Bender joined Aerojet today as an executive director of Advanced Programs in the Business Development department. Bender will be responsible for creating and developing opportunities for the company.

Aerojet Supports Conference to Discuss Utilization of ISS and Extension to Mars Missions

SACRAMENTO, Calif., March 31, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today its sponsorship for the ISS and Mars Conference to be held on April 6 and 7 at the George Washington University in Washington, D.C.

Aerojet Propulsion Assists Voyager 1 Precision Maneuver at the Edge of the Solar System

SACRAMENTO, Calif., March 31, 2011 – Aerojet, a GenCorp (NYSE: GY) company, announced today that its thrusters on the Voyager 1 spacecraft assisted in several critical repositionings of the spacecraft over 10 billion miles away from the sun, at the edge of the solar system.

Aerojet Completes Acceptance Testing on First MR-104G Engine Supporting NASAs Orion Crew Exploration Vehicle

SACRAMENTO, Calif., March 30, 2011 – Aerojet, a GenCorp (NYSE: GY) company, in conjunction with Lockheed Martin and NASA, successfully completed vibration and hot fire acceptance testing on its first development MR-104G mono-propellant rocket engine planned for use on NASA’s Orion Crew Module (CM). Twelve 160-lb.