Solid Rocket Motors

Delivering at Scale Today. Expanding Capacity for Tomorrow.

We Deliver World-Class Propulsion

With over seven decades of expertise and more than one million solid rocket motors (SRMs) delivered, we are a trusted leading provider of large, medium and small propulsion systems that are key enablers in deterring, defending and defeating threats, delivering cargo to space and propelling discovery.

Propulsion technology is the cornerstone of our nation’s ability to protect and defend the U.S. and our allies against adversaries in a dynamic threat environment. It is essential to missile defense efforts like Golden Dome for America. It’s also the cornerstone for exploration into the vast unknown of space.

An Industry-Leading Propulsion Portfolio

Enabling critical national security, defense, civil and commercial space missions.

DETER

Propulsion that deters aggression

DETER

DEFEND

Propulsion that protects the homeland and allies

DEFEND

DEFEAT

Propulsion that powers smart, survivable, lethal weapons to defeat complex threats

DEFEAT

DELIVER

Propulsion that delivers payloads and people to space

DELIVER

DISCOVER

Propulsion that enables exploration and propels discovery

DISCOVER

Propulsion for Any Mission

From a few inches to the largest segmented solid rocket motor ever produced, our SRMs fit broad customer needs across diverse mission sets.

Small Solid Rocket Motors

Providing affordable mass to combat dynamic threats

(Video Source: DVIDS/DoD)

Medium Solid Rocket Motors

Delivering speed, range and precision for warfighters

(Video Credit: NASA)

Large Solid Rocket Motors

Building on our mission heritage to support human spaceflight and scientific exploration, as well as commercial launch service providers

(Video Credit: ULA)

Ready Now and Future Capable

Investing to further expand production capacity.
1.3M SRMs delivered

$1B invested in SRM capacity

30M lbs propellant per year with room to scale

Tripling tactical SRM capacity at Allegany Ballistics Lab in West Virginia

Doubling large SRM production at our Utah facilities

Quintupling delivery of high-speed and hypersonic propulsion at our Elkton, Maryland facility

1.3M SRMs delivered

Propelling Progress

Northrop Grumman is rapidly developing new solid rocket motors with continuous innovation. Using advanced propellant, robotic manufacturing and innovative data collection processes, we're perpetually iterating new technologies, reducing manufacturing time and delivering with agility and speed. As we expand production for the missions of tomorrow, we are developing in record time new rocket motors that can travel farther, faster and more affordably than ever.

NOVEL PROPELLANT PROCESSING

In just five months, our engineers in Rocket Center, West Virginia, designed and delivered a 2.5-inch highly loaded grain motor that packs more punch. (Image Credit: Raytheon)

NOVEL PROPELLANT PROCESSING

ACCELERATED DEMONSTRATION

A team in Elkton, Maryland, took just 10 months to design, develop and successfully demonstrate a new 21-inch second-stage solid rocket motor for multiple-mission use.

ACCELERATED DEMONSTRATION

DISRUPTIVE DEVELOPMENT

Monthly demos of disruptive propulsion technologies under our Accelerated Development of Advanced Propulsion Technology (ADAPT) program aim to enhance performance, producibility and cost.

DISRUPTIVE DEVELOPMENT

RAPID ITERATION & TESTING

Our Solid Motor Annual Rocket Technology Demonstrator (SMART Demo) is an annual effort to rapidly design, develop, build and test a new solid rocket motor and associated tooling tailored to specific industry or warfighter needs.

RAPID ITERATION & TESTING

Manufacturing Powerhouse

Northrop Grumman's 10 million square feet of SRM manufacturing space across three states is a national asset.
rocket on display outside the Promontory facility
Final Assembly for the Artemis rocket booster Segments
aerial view of advanced manufacturing facility in Bacchus Utah
green tank and worker inside the Promontory facility
Composite Case Winding for large solid rocket motor
Bacchus SRM production facility
Allegany Ballistics Laboratory aerial view
aerial view of buildings in Elkton Maryland
five workers with blue jumpsuits in propulsion facility
five workers with blue jumpsuits in propulsion facility
Powering Space Exploration with Unrivaled Rocket Motors
Promontory, Utah, is a cornerstone in space exploration and national defense, home to the world's biggest and most powerful solid rocket motors. 
Final Assembly for the Artemis rocket booster Segments

Capacity for Today and Tomorrow

Since 2018, Northrop Grumman has invested more than $1 billion in boosting our SRM propulsion manufacturing facilities across the U.S. to ensure we have excess capacity today and room to grow tomorrow.

2025: ABL Plant III Improvements

ABL Plant III Improvements
man working on solid rocket motor
man working on solid rocket motor
Adding new Mix/Cast building with 300-gallon mixer in 2025, increasing propellant mix capacity by 15% in immediate termFacility modernization improvements

2025: Utah Expansion Complete

building with Northrop Grumman logo
building with Northrop Grumman logo
Expansion and modernization complete in Utah facilities2x large SRM production3x propellant casting capabilities

2025: ABL Missile Integration Facility

military aircraft launching missile
military aircraft launching missile
113,000 square foot facilityHigh-capacity production for strike missiles; supports production of 300 strike missiles per yearHighly automated, digital factory

2026: Elkton Propulsion Innovation Center

Elkton Maryland facility
Elkton Maryland facility
57,000 sq ft engineering facility will house 250 engineers working on advanced propulsion products to support U.S. and allied defense programsPart of a broader $100 million investment at the Elkton site

2027: ABL Plant V

aerial view of buildings
aerial view of buildings
22 new buildings; three new 300-gallon mixersIncreasing energetics capacity by 30%Inert processing and final assembly

2028: Expanding Propellant Production

propellant production
propellant production
Annual propellant production capacity is expected to reach nearly 50 million pounds across Northrop Grumman

2029: Boosting SRM Production

rocket motor test
rocket motor test
SRM production will increase to over 25,000 per year25% growth from 2028

Propulsion Programs

Defense

Minuteman III

Minuteman III

Trident II D5

Trident II D5

Sentinel

Sentinel

Second Stage Solid Rocket Motor (SSRM)

Second Stage Solid Rocket Motor (SSRM)

Third Stage Solid Rocket Motor (TSRM)

Third Stage Solid Rocket Motor (TSRM)

Guided Multiple Launch Rocket System (GMLRS)

Guided Multiple Launch Rocket System (GMLRS)

Next-Generation Short Range Interceptor (NGSRI)

Next-Generation Short Range Interceptor (NGSRI)
Space

Space Launch System and Launch Abort Motor

Space Launch System and Launch Abort Motor

Attitude Control Motor

Attitude Control Motor

GEM 63/63XL

GEM 63/63XL

Mars Ascent Propulsion System (MAPS)

Mars Ascent Propulsion System (MAPS)

News

Propulsion Capacity Expansion
Northrop Grumman’s GEM 63XL Solid Rocket Boosters Help Power First Certified Flight of ULA’s Vulcan Rocket

Northrop Grumman’s GEM 63XL Solid Rocket Boosters Help Power First Certified Flight of ULA’s Vulcan Rocket

Northrop Grumman Continues Advanced Propulsion Capacity Expansion at Elkton, MD Campus

Northrop Grumman Continues Advanced Propulsion Capacity Expansion at Elkton, MD Campus

Northrop Grumman Increases Hypersonic Manufacturing Production Capacity and Affordability

Northrop Grumman Increases Hypersonic Manufacturing Production Capacity and Affordability

Northrop Grumman Expanding Capacity to Meet Global Security Demands

Northrop Grumman Expanding Capacity to Meet Global Security Demands

Northrop Grumman Announces New Missile Integration Facility

Northrop Grumman Announces New Missile Integration Facility

Northrop Grumman Invests in New Solid Rocket Motor Manufacturing Facilities in Magna, Utah

Northrop Grumman Invests in New Solid Rocket Motor Manufacturing Facilities in Magna, Utah

SRM Production & Performance
Northrop Grumman Tests Most Powerful Segmented Solid Rocket Booster Ever Built

Northrop Grumman Tests Most Powerful Segmented Solid Rocket Booster Ever Built

Northrop Grumman Propels PrSM During Launcher Integration Test

Northrop Grumman Propels PrSM During Launcher Integration Test

Northrop Grumman Successfully Test Fires Solid Rocket Motor for US Navy

Northrop Grumman Successfully Test Fires Solid Rocket Motor for US Navy

Northrop Grumman Successfully Tests First Digitally Designed Large Solid Rocket Motor

Northrop Grumman Successfully Tests First Digitally Designed Large Solid Rocket Motor

Northrop Grumman GEM 63 Solid Rocket Boosters Help Successfully Launch National Security Mission Aboard Atlas V Rocket

Northrop Grumman GEM 63 Solid Rocket Boosters Help Successfully Launch National Security Mission Aboard Atlas V Rocket

Northrop Grumman Successfully Tests a New Solid Rocket Motor Developed in Less Than a Year

Northrop Grumman Successfully Tests a New Solid Rocket Motor Developed in Less Than a Year

Northrop Grumman Completes First Use of Modular Tooling for Large Solid Rocket Motor Case

Northrop Grumman Completes First Use of Modular Tooling for Large Solid Rocket Motor Case

Northrop Grumman’s Solid Rocket Boosters Help Power First Launch of ULA’s Vulcan Rocket

Northrop Grumman’s Solid Rocket Boosters Help Power First Launch of ULA’s Vulcan Rocket

Northrop Grumman Successfully Powers US Navy’s Trident II D5 Flight Test

Northrop Grumman Successfully Powers US Navy’s Trident II D5 Flight Test

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