The 2011-2012 Paramount Pictures Clinic team was tasked with making improvements to the energy efficiency of launched roller coasters. At the beginning of braking, launched coasters maintain as much as 70% of their initial kinetic energy, so significant recapture potential exists for regenerative braking systems. We pursued an electro-magnetic system, which could be implemented on existing roller coaster designs. We produced a proof-of-concept design and collected and analyzed experimental data to support our conceptual design parameters.