What are the most efficient plane designs if you are going for distance? i assume it would either be a glider (so you can switch between gliding and flying to save battery) or a flying wing. As far as electronics go i assume it would be a Li-on battery as it has better flight times coupled with a highly efficient setup. (AKA what are some efficient motor/ESC setups? Is it possible to have a "smart plane"? What i mean by this is hopefully a plane that #1 if signal is ever lost it will simply retrace its path and land itself. and #2 has some sort of radar or lidar on board so if an object comes at it while signal is lost (AKA a bird, a plane, BATMAN) it can sense and avoid it? What would i need for this kind of setup (arduino? GPS module?) Also as far as long range systems go (for both reciever transmitter and FPV feed) what are some options (hopefully some cheap and some REALLY long range ones? Thanks!