The Kinetic Energy Interceptor (KEI) began cold-launch system testing essential for mobile, global and flexible missile defense, Northrop Grumman Corp. [NOC] announced.
A key part of this system — the solid propellant gas generator — was successfully tested Dec. 18 at the Alliant Techsystems [ATK] facility in Elkton, Md.
ATK supplies the gas generator, and Raytheon Co. [RTN] participated as the team’s lead for interceptor development.
“The gas generator provides the energy needed for steam- or gas-launched missiles that will give KEI a land-based defensive capability that could be transitioned easily to sea- based platforms,” noted Anthony Spehar, vice president and KEI program manager for
The Northrop Space Technology unit. “The test measured chamber pressure, temperature and propellant burn duration, all of which were within expectations.”
Northrop is developing the cold-launch system for KEI based on those it has supplied for Navy submarines since the 1950s as well as those used on silo-based Peacekeeper intercontinental ballistic missiles. Work is underway at company facilities in Sunnyvale, Calif.
“Eject or cold launch technology is a proven approach used on Navy submarines for many years,” Spehar noted.
“Using this very safe technology, we can launch large or highly energetic missiles, such as KEI, because only a small amount of propellant is needed to eject the interceptor compared with igniting the first stage rocket motor.”
Featuring the Missile Defense Agency high-acceleration booster, the KEI launch system is designed to eject an interceptor about 200 feet in the air before the first stage rocket motor ignites. For KEI, about 70 pounds of propellant is ignited in the gas generator to eject the approximate 25,000-pound missile.
During the next several weeks, data will be analyzed and will be used to validate design, performance and analytical models. Two additional gas generator tests are planned at different temperatures within the upcoming months, followed by simulated breach assembly tests in 2009, which introduces a steam coolant system. Two simulated missile eject test demonstrations are planned for 2010.