Heart also plans to fly the X1 within the next six months from a yet-to-be-decided airport in the U.S., which would make it the first new-generation hybrid aircraft to reach that milestone.
The advancement of hydrogen and electric propulsion research at Royal NLR comes as several Netherlands-based companies are designing new-generation aircraft.
Lilium's board turnover comes on the heels of the Bavarian state government clearing the way for a €50 million ($55 million) loan guarantee to support the AAM outfit.
Airbus UAM CEO Balkiz Sarihan tells Aviation Week the CityAirbus NextGen full-scale eVTOL prototype is on track to make its first flight before year-end.