Hydrogen Fuel Cells for Drones: Engineering Flight Past the Battery Wall
A cargo drone lifts off from a distribution hub outside a mid-sized European city, carrying a 2-kilogram medical package to a clinic 35 kilometers away. The route is straight, the weather cooperative, the airspace cleared. The drone will not make it. At a cruise draw of 1,200 watts, its 6-kilogram lithium-ion pack gives roughly 40…
