Radio range
RPV with off-the-shelf radio equip?
Don't even try it. You are running the risk of law suit on your hand. Not that there is anything against mounting a remote camera on your model, but how well can you control your model using JUST a camera when it is out of sight. Real RPVs used by the army or for scientific research are control by GPS satellites when they are out of the pilot's sight. Altitude control is completely under computer control via info from GPS satellites. They only take off and land visually by real pilot. Note, human distance of sight is about 1/4 to 1/3 mile. Your rc radio operates at 0.75kW (less than 1.5 miles). You are running a great risk of RF inteference beyond 1 mile. Just my own 2 cents.