Clean, quiet hybrid electric aircraft take flight
![](https://projects.research-and-innovation.ec.europa.eu/sites/default/files/styles/medium/public/successstory/25-2_04_18_small.jpg?itok=jwIuP6Au)
Hybrid and electric vehicles are increasingly common on Europe's roads. Now similar clean and quiet technologies are taking to the skies, thanks to an EU-funded project developing and testing innovative aircraft propulsion systems.