Czech company UDX is flying scale prototypes of a tandem 2-up eVTOL it calls Airwolf. With individually-tilting ducted fan propulsion, it's got enough wing surface for efficient cruise flight as well as agile movement from a hover. Imagine waking early Sunday morning to ride the twisty coastal mountains of beautiful southern California. It's going to be a perfect day and you expect exactly zero traffic, because you're leaving the Hayabusa in the garage and taking your UDX Airwolf hoverbike. You don your lid, crank up your favorite tunes, spin up the ducted fans, lift off and hover out of your...