[youtube]http://www.youtube.com/watch?v=YQIMGV5vtd4&hd=1[/youtube]
Researchers at GRASP Lab at the University of Pennsylvania have been working with nano quadrotors since at least 2010, managing to get them to fly aggressively, build a tower structure and now — fly in perfect formation.
Continue reading… “Swarm of nano quadrotors fly in formation: Video”