Autonomous quadrotors

Here's a prototype of an autonomous helicopter with four engines (quadrotor) capable of carrying out extreme movements in confined areas. Daniel Mellinger, Nathan Michael and Vijay Kumar from Grasp Lab at the University of Pennsylvania have designed this ultra easy to use UAV (Unmanned Aerial Vehicle). The quadricopter passes easily through windows in a vertical position regardless of the angle of the opening. It does so at a high speed and stabilizes itself the right way up or upside down immediately after. There could be many applications for this type of drone: military intelligence, for the police, or even for natural disasters such as the collapse of buildings. http://www.youtube.com/watch?v=MvRTALJp8DM