GEM 63XL Static Test
Building the world's largest monolithic solid rocket motor.
![GEM 63XL in Test Area The GEM 63XL static test motor installed into the test bay at the Promontory, Utah, facility Test Area.](https://cdn.northropgrumman.com/-/jssmedia/wp-content/uploads/189468_2.jpg?mw=3840&rev=2868f4e05493444e8e82a9c7708355bf)
Qualification Motor
This booster motor is being qualified to power ULA’s Vulcan Centaur launch vehicle with a design that leverages Northrop Grumman’s GEM 63 motor in an extended length configuration.
Press Releases
![GEM-63XL-Solid-Rocket-Boosters-to-Support-Vulcan-First-Flight rocket being assembled in cleanroom](https://cdn.northropgrumman.com/-/jssmedia/wp-content/uploads/GEM-63XL-Solid-Rocket-Boosters-to-Support-Vulcan-First-Flight.jpg?mh=300&rev=6919e626fec4452aa38175dab8214513)
Northrop Grumman Delivers First GEM 63XL Solid Rocket Boosters to Support Vulcan First Flight
![Northrop Grumman Successfully Completes Validation Test of New Rocket Motor for United Launch Alliance](https://cdn.northropgrumman.com/-/jssmedia/wp-content/uploads/Northrop-Grumman-Successfully-Completes-Validation-Test-of-New-Rocket-Motor-for-United-Launch-Allian.jpg?mh=300&rev=afc55ff119ab478887f7605073489131)
Northrop Grumman Successfully Completes Validation Test of New Rocket Motor for United Launch Alliance
![GEM 63XL Static Fire Test The GEM 63XL motor fires at the Promontory facility’s Test Area.](https://cdn.northropgrumman.com/-/jssmedia/wp-content/uploads/GEM63XL_1-2.jpg?mh=300&rev=953a258b9e194eb1a39feb67a1e7bca7)
Northrop Grumman Successfully Completes First Qualification Test of New Rocket Motor for United Launch Alliance
Videos
![GEM 63XL Rocket Motor Completes Case Winding A GEM 63XL rocket motor completes case winding and waits to be filled with propellant.](https://cdn.northropgrumman.com/-/media/wp-content/uploads/GEM1copy.png?h=1905&iar=0&w=2975&rev=78d0568c8d5e4691873739c76cbb93b7)
Image Gallery