nuclear-news

US Air Force tests very expensive third-stage rocket motor for next nuclear missile

By Stephen Losey

The U.S. Air Force and two main contractors on the LGM-35A Sentinel intercontinental ballistic missile program on Saturday tested the solid-rocket motor that will power the nuclear weapon’s third stage.

The test, which also involved Northrop Grumman and Aerojet Rocketdyne, took place in a closed chamber at the Arnold Engineering Development Complex in Tennessee. It followed static fire tests of the first and second stages’ rocket motors in March 2023 and January 2024, respectively.

This third stage that was tested is the smallest of Sentinel’s three-stage propulsion system. The Air Force did not offer further details about the test, nor did it identify whether the event was successful.

“This test is the latest in our ground and flight test program and is designed to help us refine Sentinel’s air vehicle design,” Maj. Gen. John Newberry, commander of the Air Force Nuclear Weapons Center and the service’s program executive officer for strategic systems. “It demonstrates the progress the Air Force is making on modernizing our nation’s strategic land-based nuclear deterrent.”

The Sentinel program is intended to replace the aging LGM-30G Minuteman III ICBM, which has been a key part of the United States’ nuclear triad since the Cold War. The Air Force now has roughly 400 Minuteman III weapons in silos spread out across Wyoming, Montana, North Dakota, Colorado and Nebraska…………………………………………..

The price tag for the Sentinel program has spiked enough to trigger a cost overrun process known as a Nunn-McCurdy breach. Top Air Force leaders have pinned the bulk of the cost growth on its highly complex command and launch segment, which involves securing real estate from hundreds of landowners across the Midwest, building more than 400 launch facilities and 7,500 miles of utility corridors, and laying thousands of miles of fiber-optic networks…………………https://www.defensenews.com/industry/techwatch/2024/03/20/us-air-force-tests-third-stage-rocket-motor-for-next-nuclear-missile/—

March 22, 2024 - Posted by Christina Macpherson | USA, weapons and war