This project investigates the propulsion characteristics of the USS Monitor. The first objective, to determine the operating characteristics of the Monitor's propeller, was accomplished by conducting open-water testing on a model propeller. It was determined that Ericsson's design was impressive for its time and had an open-water efficiency comparable to that of a modern constant-pitch propeller. The second objective was to determine why the Monitor was unable to make design speed. Through the performance of a calm-water resistance test and wake survey on a model of the hull, it was determined that due to a lack of knowledge in the industry, Ericsson was unable to properly size the engine. The final objective was to use the collected data to design a modern propeller to Ericsson's design conditions. In order to minimize tip vortex cavitation and severe propeller induced vibrations due to a small tip clearance, pitch at the tip was reduced substantially. The open water efficiency was comparable.

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