World’s First Hydraulic Drone Promises Six-Hour, Non-Stop Flights Over 500 Miles

It might not look perfectly stable in the air just yet, but a company called Flowcopter is building the world’s first hydraulic drone that trades batteries and electric motors for pumps and gas engines delivering a range of hundreds of miles and flight times that last hours.

Source: World’s First Hydraulic Drone Promises Six-Hour, Non-Stop Flights Over 500 Miles