An electric vertical take-off and landing (eVTOL) aircraft uses electric power to hover, take off, and land vertically. This technology came about thanks to major advances in electric propulsion (motors, batteries, fuel cells, electronic controllers) and the growing need for new vehicles for urban air mobility (air taxi). Examples are being developed by aircraft companies such as Boeing,[1] Airbus, Embraer, Honda, Toyota, Hyundai and NASA.