As if launching one drone alone wasn't good enough, hobbyists at Flite Test have decided that a drone carrier is totally a necessity in the UAV world. Yep, this video shows one drone take off from the back of another.
The carrier drone is a modified quadcopter, with four rotors supporting a long, rectangular strip. Sat on the back is a small aircraft that takes off from the launchpad. The carrier clearly struggles a little bit with balance (it's a good job that the second craft is quite small) but sure enough, it makes it reliably into the air.
So, when can we expect a full-grown version? Likely not for decades. Quadcopters, after all, are massively power hungry. Indeed, Popular Science points out that a human-sized version would require "the same amount of force as that generated by some 70 Space Shuttle Solid Rocket Boosters to lift it into the air." So we're in for a wait, then. [Popular Science]