ABSTRACT
Investment-casting masters of a selected propulsion-hardware component, a fuel pump housing, were rapid prototyped on the several processes in-house. The models were then shelled in-house using a commercial-grade Zircon-based slurry and stucco technique. Next, the shelled models were fired and cast using a commonly used testhardware metal. The cast models are compared by their surface finish and overall appearance (i.e., the occurrence of pitting, warpage, etc.), as well as dimensional accuracy.
