08/31/2015. Remarks by Karl Heinz Schmid: "This plane is a cooperation between Boeing and Diamond and it was tested in Spain.

The pilot climbed to 3,281 ft (1,000 m) 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 62 mph (100 kmh) for about 20 minutes solely powered by fuel cells. This is a first in the history of aviation."