The commercial promise of drones has been limited by their short battery lives and propensity for flying off. Now some companies believe they have a solution: tie the drones to the ground with tethers hundreds of feet long.
WSJ.com: US Business, Wall Street Journal: Business
Sun, 08/02/2015 - 4:41pm
The commercial promise of drones has been limited by their short battery lives and propensity for flying off. Now some companies believe they have a solution: tie the drones to the ground with tethers hundreds of feet long.