The idea of flying taxis, known within the aviation industry as electric vertical take-off and landing aircraft (eVTOLs), has seemed like a faraway fantasy for some time. Ever since a Nasa concept video demonstrated in 2009 how a personal electric flying car could work, there have been countless companies working to make it a reality. Investors have pumped over $12 billion into original equipment manufacturers (OEMs) operating in the sector, including US-based Joby Aviation and London’s Vertical Aerospace since 2019, according to data from Alton Aviation. That investment is starting to take shape with German manufacturer Lilium plotting a series…