With self-driving cars generating so much buzz, it’s hard to believe that a self-piloting air taxi is, err, flying under the radar. But not for long. We spoke with Arne Stoschek, head of autonomous systems at Airbus A3 (pronounced “A-cubed”), the Silicon Valley-based advanced products and partnerships outpost of Airbus Group about a plan to bring a self-piloted air taxi to the Bay Area’s skies.