![Optimal-time quadcopter descent trajectories avoiding the vortex ring and autorotation states - ScienceDirect Optimal-time quadcopter descent trajectories avoiding the vortex ring and autorotation states - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0957415820300428-gr1.jpg)
Optimal-time quadcopter descent trajectories avoiding the vortex ring and autorotation states - ScienceDirect
Vuichard's Recovery | This video is an excellent example of Vuichard's recovery from Vortex Ring. We feel this is a great educational tool for everyone to understand. Well... | By HQ Aviation | Facebook
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