easyJet’s partner Wright Electric has revealed the latest milestone in its engine development programme which is working towards the development and certification of the first commercially viable, zero-emissions single-aisle aircraft. Wright has now demonstrated the first inverter system of its kind for large zero-emissions aircraft. Whether a future aeroplane is battery-electric or powered by a hydrogen fuel cell, an inverter is a key component in medium voltage aircraft electric systems. Its purpose is to convert the DC power from batteries to the AC power required by the propulsion system’s electric motors. Designed to be scalable from 500 kW to 20