Drones fall from the sky

Drones are not immune to the whole “What goes up must come down” thing, and their descent is not always planned. If a drone falls out of the sky, the plummeting load can weigh up to a dozen pounds and be accompanied by four spinning rotors ready to rip into, or lop off, anything that gets in their way. David Oneal and one of the founders of the company Indemnis, first saw this problem when working in the film industry, so he, and his team, set out to fix it. David Oneal likes Drones and cameras Since drones have four rotors, if one of them fails the imbalance sends the machine into a high rpm tumble. If the drone just popped out a parachute like the paratrooper …

From http://www.thatdroneshow.com/drones-fall-from-the-sky/