Electric dreams: The race to develop battery-powered planes
The pressure to cut emissions, noise and cost is encouraging aircraft companies to design planes with electric engines.
But the challenge is to develop commercially viable electric aircraft, capable of taking lots of passengers.
This is part of the BBC's Disruptors series. You can read the full article here.
Producer: Adrienne Murray; Video editor: Sara Hegarty; Camera: Tracey Langford, James Cooke