Soviets

An airliner successfully flown powered by hydrogen in 1988.

An engine that burns hydrogen as fuel, emitting only water vapor, while mirroring traditional internal combustion principles.

An aircraft propulsion system that uses hydrogen fuel cells to generate electricity for electric motors.

Devices that convert chemical energy from a fuel into electricity through an electrochemical reaction, producing minimal emissions.

California

United Kingdom

Development of hydrogen-electric propulsion technology by ZeroAvia, in partnership with major airlines and Shell.

Airbus' roadmap for developing zero-emission commercial aircraft.

Project between ZeroAvia and Alaska Airlines to develop the world's largest zero emissions aircraft.

An airliner successfully flown powered by hydrogen in 1988.