US firm tests solid rocket motor, propulsion tech for target vehicles

Northrop Grumman, a Virginia-based US firm, has successfully tested the first of two new solid rocket motors—SMASH!22 and BAMM!29 2.0—under its Solid Motor Annual Rocket Technology Demonstrator (SMART Demo) program. The SMASH!22, a 22-inch diameter motor, underwent a static test fire that incorporated advanced manufacturing techniques, new materials, and innovative processes aimed at speeding development, improving performance, and reducing costs. This test generated extensive data to enhance understanding of these novel technologies, which are the first of their kind in the solid rocket motor industry. The SMART Demo program is an annual initiative designed to develop, build, and test new solid rocket motors and associated tooling, focusing on technologies such as complex additively manufactured components and alternative manufacturing materials. The second motor, BAMM!29 2.0, a 29-inch diameter Bombardment Attack Missile Motor, is scheduled for static testing in early 2026. Northrop