Quantum Systems makes drones that do this, and they get massively longer flight times than standard quadcopters. Their Vector drone can fly for 120 minutes, com

Quantum Systems makes drones that do this, and they get massively longer flight times than standard quadcopters. Their Vector drone can fly for 120 minutes, comparable to this fossil fuel powered quadcopter, on batteries alone: https://www.quantum-systems.com/project/vector/ https://www.quantum-systems.com/project/vector/