RE: FPV for Search & Rescue mission
The flat bottom airfoil is not a good choice as when you think about it this will be flying in less than ideal conditions of strong winds and high gusts. More in the realm of slope soaring conditions. High penetration foils like HN 1003, 852, 947, or MH 32 or even a JH8 would be more appropriate. Because of sever flying conditions any access dihedral would be a hindrance. The airframe would utilize self stabilizing enhancements eliminating the need for this.
At this time a highly modified slope soaring platform seems to offer the most realistic solution to all weather conditions. Use of trailing edge flaps/ailerons would allow camber changing to allow for slower flight in good conditions or to more thoroughly scan the terrain.
This new drone controversy is some what concerning.
Dennis