United Technologies Introduces Hybrid-Electric Airliner

The Pragmatic Future of Hybrid-Electric Flight: A Technical Analysis of United Technologies Advanced Projects' X-Plane

https://tech.utc.com/-/media/Project/UTRC/UTRC-Intranet/Technology/Tech-Website/UTAP/A-Technical-Analysis-of-United-Technologies-Advanced-Projects-X-Plane---March-2019---Final.pdf?la=en&hash=EEE68669717E00BF5547C244C561BD23184D495B