Worlds first controllable robotic samara monocopter MAV, University of Maryland's Ulrich flyer - YouTube

https://www.youtube.com/watch?v=sbuGCgc-JCM

The culmination of 3.5 years of research has led to controllable monocopter that can autorotate like a maple seed (Acer diabolicum Blume) and fly like a heli...