Diamond electric plane EC-003
This plane is a cooperation between Boeing and Diamond. It was tested in Spain. The pilot climbed to 3300 ft on a combination of ion-lithium battery power
and power generated by hydrogen fuel cells. After reaching the cruise altitude, the pilot disconnected the batteries and flew straight and level at about
100 km/h (62 mph) for about 20 minutes solely powered by fuel cells. This is a first in the history of aviation.