The prototype launch tube forms the core of a new modular infrastructure concept developed with Bechtel. The Sentinel programme is designed to modernise the land-based component of the United States’ nuclear deterrent and remain operational through 2075.
The companies began construction of the prototype within three months of concept review by the Air Force. The test is intended to validate structural design and construction methods while demonstrating readiness to scale production.
Northrop Grumman said the new approach is expected to compress traditional multi-year development timelines. The modular design is also intended to control costs and improve long-term maintenance efficiency for future silo infrastructure.
“Sentinel is a national security priority and proving out the launch silo concept is critical to creating a repeatable approach that will accelerate deployment of a fully fielded Sentinel system. The shift in Sentinel silo construction will improve quality and provide a secure, survivable and cost-effective launch silo that is more efficient to maintain,” said Sarah Willoughby, vice president and general manager of Strategic Deterrent Systems at Northrop Grumman.
“We are honored to be a part of the Sentinel mission to deliver the next generation of national security. The prototype missile silo builds the foundation needed for us to be successful in the field. It builds confidence in our execution plans, while mitigating risks to delivery,” said Mike Costas, senior vice president and general manager of Defense and Space at Bechtel.
Northrop Grumman leads a nationwide team under the Air Force’s Sentinel engineering and manufacturing development contract. The programme incorporates digital engineering and has advanced through testing of missile components, command and control systems and security technologies.
The company has completed test firings of all propulsion stages of the Sentinel missile, including a hot fire test of the post-boost propulsion system. It has also completed the critical design review for the Sentinel Launch Support System, enabling further system build, testing and qualification.
Bechtel is supporting the design and construction of launch infrastructure from its operations in Ogden, Utah. The company is working with Northrop Grumman to deliver infrastructure that meets Air Force requirements for the next-generation system replacing the Minuteman III missile.
