Before the 100 Spaxels make their European public debut above the Danube on Saturday, September 10, 2016 just before the opening act of the Klangwolke, they’ll be subjected to a rigorous physical exam. The first two test flights already took place this week—the quadcopters lifted off from a secluded field in Mühlviertel, the rural area north of Linz, and put on quite a show (that not too many people got to see).
