In previous posts, we reported on the aggressive quad-rotors from the University of Pennsylvania which are capable of doing amazing things quite effortlessly.
Achieving such impressive results required a lot of hard work, testing and trial-and-error. The video below focuses on the “error” part
This is a companion discussion topic for the original entry at https://community.robotshop.com/blog/show/we-love-quadrotors-even-when-they-fail