Originally Posted by
CESSNA 421
Think about this, do any of our radios legally have the power output to control something a mile away?
Yes off the shelf equipment can do 1 mile very easily.
This video shows stock 2.4Ghz equipment working out to 5+ miles.
https://www.youtube.com/watch?v=0lxLJOLr7xQ
The specifications on DJI's Phantom 4 site lists FCC compliance to 3.1 miles.
http://www.dji.com/product/phantom-4/info#specs
Many radios can be fitted with UHF systems that are good for 30+ miles.
http://www.fpvpro.com/dragonlink/