Coupler bulkhead and location in rocket (left); thrust bulkhead and location in rocket (right).

Coupler bulkhead isometric view (left) and assembly context view (right, with coupler bulkhead in blue). 

Selected slide from the critical design review (CDR) showcasing the finite element analysis setup.

Selected slide from the critical design review (CDR) showcasing the calculated stress margins from the analysis.

Thrust bulkhead isometric view (left) and top-down view (right). 

Thrust bulkheads as-machined. 

Thrust structure test fitted on the engine injector plate and ignitor assembly.