Blade Runner: 18-Rotor "Volocopter" Moving from Concept to Prototype

Inventor and physicist Thomas Senkel created an Internet sensation with the October 2011 video of his maiden—and only—test flight of a spidery proof-of-concept 16-rotor helicopter dubbed Multicopter 1. Now the maker of the experimental personal aviation craft, the European start-up e-volo, is back with a revised "volocopter" design that adds two more rotors, a serial hybrid drive and long-term plans for going to 100 percent battery power. The new design calls for 1.8-meter, 0.5-kilogram carbon-fiber blades, each paired with a motor. They are arrayed around a hub in two concentric circles over a boxy one- or two-person cockpit. After awarding the volocopter concept a Lindbergh Prize for Innovation in April, Yolanka Wulff, executive director of The Charles A. and Anne Morrow Lindbergh Foundation, admitted the idea of the multi-blade chopper at first seems "nutty." Looking beyond the novel appearance, however, she says, e-volo's concept excels in safety, energy efficiency and simpli ... Read full article.