Abstract
In this paper we describe procedures and lessons learned in the use of stereolithography for manufacturing objects using investment casting. Procedures described are the results of manufacturing complex components used in a unique structural framework. The complexity of the object is due to varying radii and angles, hollowness, sockets of constant wall thickness where tubular structural members are designed to mate, as well as sizes exceeding work envelope. Complexity of the object required deviation from conventional techniques used in investment casting. Rapid prototyping proved superior to traditional methods both from an economic and technical standpoint, especially where limited numbers are required.