There are a bunch of electric aviation companies out there -- Zunum Aero is one that is backed by Boeing. Mokulele Airlines, Ampaire test new hybrid-electric plane on Maui - story came out today from local TV station KITV. Google "electric airplanes 2020". Battery companies also getting better at creating batteries with improved energy density to tackle the weight issue-- just a matter of time and best to get your foot in the door now.