ZeroAvia's hydrogen fuel cell powertrain program is the most documented attempt to overcome the 300-nautical-mile range ceiling that battery electric aviation cannot break.
JetZero's blended wing body aircraft could cut airliner fuel burn by 25-50%, with a full-scale prototype funded by the Air Force expected to fly in 2027.
Hydrogen fuel cells may replace avgas in aviation, with flight-tested technology and a realistic timeline stretching from 2029 for regional aircraft to the late 2030s for GA.