Lockheed Martin Completes NGI Second-Stage Motor Burst Test

Lockheed Martin has completed a burst test of the second-stage rocket motor case for the Next Generation Interceptor (NGI), validating the structural integrity of the propulsion system under high-pressure conditions. The testing milestone advances the missile defense program toward its Critical Design Review (CDR).

Structural Burst Testing and Motor Validation
Engineers evaluated the composite motor case by filling it with a carbon-fiber reinforced water vessel and pressurizing it beyond anticipated flight operating pressures. The motor case sustained the required induced loads prior to structural failure, validating the composite material’s strength-to-weight ratio and confirming its capacity to withstand extreme launch environments to deliver the interceptor payload into orbit.

Christopher Jewell, Vice President of Lockheed Martin NGI, stated that the test serves as a milestone on the path toward Critical Design Review, proving that the advanced motor architecture can withstand flight conditions and deliver performance accuracy ahead of targeted deployment by 2030.

Digital Engineering and Manufacturing Infrastructure
Completing the burst test keeps the NGI program on schedule for CDR and subsequent low-rate production. Development timelines are supported by a digital engineering framework that allows design iterations, fabrication, and validation cycles to be completed in months.

To support future production demands, Lockheed Martin is making capital investments to construct and expand purpose-built manufacturing facilities in Alabama. These capital projects incorporate advanced manufacturing equipment, dedicated assembly lines, tooling, and optimized plant layouts. The program also leverages supply chain capabilities across the United States.

Ground-Based Midcourse Defense Capabilities
The NGI platform is being developed as an element of the Ground-Based Midcourse Defense architecture. The system is engineered to upgrade national missile defense infrastructure and increase capacity against ballistic missile threats.

Additional Context
This section details technical specifications not included in the original news release.

Solid rocket motor cases for exoatmospheric ballistic missile interceptors are engineered using advanced composite pressure vessels, typically utilizing continuous carbon fiber filaments wound over an internal elastomeric thermal insulation liner. Precision filament winding uses high-tensile carbon fiber tow preg impregnated with epoxy resin matrices to maximize the hoop and axial tensile strength of the motor casing. This composite construction achieves an optimal strength-to-weight ratio, minimizing structural dry weight while maximizing propellant mass fraction to achieve the burn velocities and delta-V required for exoatmospheric interception.

Hydrostatic burst testing represents a standard destructive validation method used to verify the structural margin of safety, ultimate burst pressure, and stress distribution of composite pressure vessels. During hydrostatic testing, the casing is filled with an incompressible fluid—such as water—and pressurized using high-pressure hydraulic pumps until mechanical rupture occurs. Utilizing liquid rather than compressed gas prevents explosive kinetic expansion upon structural failure, allowing engineers to gather strain gauge data, track micro-cracking propagation via acoustic emission sensors, and verify that structural failure occurs within the designed pressure threshold without unpredictable premature delamination.

Edited by Romila DSilva, Induportals Editor, with AI assistance.