The sky is the limit – how hydrogen will power aviation

Aircraft manufacturers and industry are working to bring climate-friendly hydrogen technologies to aircraft and build the necessary aviation infrastructure. Hydrogen has the potential to revolutionize aviation: Converted via fuel cell into electricity for electric motors, the energy-rich element paves the way to virtually emission-free flying. Modified aircraft gas turbines powered directly by hydrogen also no longer emit carbon dioxide. The nitrogen oxide emissions remaining with such CO2-free hydrogen combustion can be technically reduced to a minimum. But what do the concrete solutions look like? What plans does the industry have? And when will H2 reach the mass market? We talk about this with Prof. Dr. Josef Kallo, CEO of H2Fly.


  • 1.48: Why is hydrogen the solution for air traffic?
  • 3.43: For which routes are hydrogen-electric passenger aircraft suitable?
  • 8.58: Do we even have the necessary hydrogen infrastructure?
  • 18.28: What are the expected costs for a series-produced H2 aircraft compared to a conventional aircraft?

Published: March 17, 2022

Listen to episode 85 of The smarter E Podcast

Click on the logo to listen to the podcast on the platform of your choice.

About Prof. Dr. Josef Kallo and H2Fly

Hydrogen-electric, emission-free flying is an important step on the way to sustainable mobility. Choosing the right platform and a strong partner enables the successful implementation of innovative passenger aviation projects. The German company H2Fly sees itself as a link between research and industry, and contributes to the implementation of quiet and emission-free propulsion technologies for a clean future through experience, expertise and the appropriate test platform.

Climate-friendly flying - this is the goal that scientist Professor Josef Kallo from the German Aerospace Center (DLR) and the University of Ulm is working towards. Together with his team, he developed the HY4 fuel cell aircraft, which took off for its maiden flight at Stuttgart Airport (STR) in 2016.

Content Partner