In a highly unusual approach, two NASA researchers have combined a flow battery system with a rim-driven propeller drive system. Presenting at the Sustainable Aviation Symposium 2019 at UC Berkeley,Robert McSwain and Jason Lechniak detailed their AQUIFER Project, currently underway in the NASA Armstrong Flight Research Center at Edwards Air Force Base. On Day Two of the Symposium, Jason headed the presentation with a discussion of the implications of this and McSwain’s work on overall energy economy and NASA eVTOL discoveries. Robert followed with a technical description of the Nano Electrofuel (NEF) Aqueous Flow Battery and Rim-driven Motor (RDM). “AQUIFER establishes technical feasibility of an early-stage technology, a high-energy density, aqueous-based, flow battery, resulting in a near-term increase of 1.7 …