What's bringing this issue to the forefront is the promise of Lithium Sulfur batteries. Right now, electric motors and lithium polymer batteries limit us to 15-25 minute flight times.
It's really frustrating, because as you add battery capacity it increases take-off weight -- but usually you come - out ahead. But then your amperage requirements per motor requirements go up, so you go to a higher rated motor. But that drives your weight up (it's a vicious cycle).
Lithium Sulfur is four times the energy density of lithium polymer. That means hour+ flight times, which makes a lot of new applications possible.
Sent from my SM-N900V using Tapatalk