Graham Warwick reports in the August 25 Aviation Week that NASA is investigating the creation of megawatt-scale electric propulsion systems for airliners. These would be much more powerful than those in cars or even semi-trucks, and far lighter than equivalent units in ships. NASA’s research involves partnering with the University of Illinois, Ohio State University, General Electric, and Boeing. NASA Glenn Research Center is working on its own self-cooled, superconducting wound field synchronous motor as part of the overall effort. NASA’s focus, according to the article, “is on electric machines that can be used as generators (sources) and motors (loads) and power electronics that convert AC to DC (rectifiers) and DC to AC (inverters).” Research includes wiring systems that can distribute high levels of electrical power. These efforts would support “near- or medium-term development of partially turboelectric and hybrid-electric propulsion systems for aircraft up to single-aisle airliner size.” Ambitious Goals, Different Approaches Goals are ambitious, with NASA Research Agreements (NRAs) awarded …