Tecnam's nine-passenger, all-electric P-Volt is set to enter commercial service during the second half of the 2020s, according to the Italian manufacturer.
NDB says its self-charging nano diamond batteries will be far more efficient than current technologies and will not require any supporting infrastructure.
The race to bring new eVTOL aircraft to market for air taxi services is only part of a wider push to advance plans for hybrid and all-electric aircraft.