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Canopus is a UAV for helping in saving drowning victims in beaches, pools, lakes, rivers and stuff. I designed it by hacking into a commercial hobby model (the V323 from WLToys). I studied its properties like aerodynamics and thrust and simulate it in softwares like FlowDesing. By the data acquired, I could modify the frame to carry a mechanism to hold and release a buoy (when its commanded by the operator). I developed the mechanism control apart from the flight controller ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/canopus-support-uav-in-rescue-missions