A 700-sized heli can kill you, but I'm not sure that even a large drone would do as much damage: http://www.dailymail.co.uk/news/article-2413231/Roman-Pirozek-J

A 700-sized heli can kill you, but I'm not sure that even a large drone would do as much damage: http://www.dailymail.co.uk/news/article-2413231/Roman-Pirozek-Jr-Man-decapitates-remote-control-helicopter.html http://www.dailymail.co.uk/news/article-2413231/Roman-Piroze... I say this because the heli in the story, as most high-end consumer RC helis these days, had 2 carbon fiber blades, and on the 700 size, tip to tip on the blades is about a meter. Consider the weight and tip speed of each blade vs. A large quad or hex or octocopter. The blades will be much smaller, so much much less kinetic energy at the tips. You also don't do this with quads: http://youtu.be/EYWLqui5VsM http://youtu.be/EYWLqui5VsM