Ursa Major Wraps Up Solid Rocket Motor Pathfinder Effort with Navy and OSC

Rocket engine manufacturer Ursa Major has finished its Solid Rocket Motor (SRM) Manufacturing Pathfinder Program, a joint undertaking with the U.S. Navy and the Office of Strategic Capital (OSC). The cost-share effort wrapped up on time in February 2026 and reflects a combined $25 million commitment from the three partners. The program’s conclusion marks the end of a coordinated push to prove out domestic manufacturing capacity for a class of motors the Navy increasingly depends on.

During the program, the company reached a series of engineering and production targets. It designed, built, and static-fired a 10-inch HLG SRM prototype, and separately created and characterized a proprietary propellant for it. The motor satisfied every performance and burn-duration benchmark, establishing bot