Quadrotors are Awesome

In case I never mentioned it enough before, quadrotors are awesome.

I've seen most of these tricks before and know how they're done, but maintaining control with 2 failed rotors blew my mind.

Cooperative Quadrotor Ball Catching!

Researchers at IDSC, ETH Zürich have developed an algorithm that allows three quadrotors to work together using a net to throw and catch balls. Using an optimal model of the system and motion tracking, they are able to throw and catch the balls to themselves either straight up or to the sides. In order to adjust for real world conditions and improve throw accuracy, a machine learning algorithm was implemented that within only 3 iterations had corrected the throw.

(Via Robots Dreams)