This project investigates the feasibility of using fuel cells to power electric fuel pumps for use in large rockets. In today’s aerospace industry, largescale, high-efficiency rockets are powered by heavy and costly turbopumps. Indeed, the complexity and weight of a rocket’s turbopump assembly can easily approach 50% of the total rocket cost. To reduce cost, the use of electrical pumps has been found to be practical for some companies. However, the inefficiency of current battery technology continues to inhibit their feasibility for use in larger rocket systems. Fuel cells, if used as a rocket engine’s power supply, could use the propellants themselves to generate the electricity required to power an electric pump. If the fuel cell power output can exceed a certain threshold, this would eliminate the need for heavy, inefficient batteries on smaller class rockets and could potentially replace complex and expensive turbomachinery in larger rockets.