I caught up with #Unither Bioélectronique to learn more about the #engineering challenges they faced on the path to first flight of their #hydrogen powered #R44 #helicopter. Thermal management was a big one, although they expect that to be easier on their next prototype. #aviation #electricaviation #unitedtherapeutics https://verticalmag.com/news/the-engineering-behind-the-first-hydrogen-powered-helicopter-flight/