Researchers at SINTEF have developed a hydrogen-powered drone designed to bridge the gap where battery-powered drones fall short.
Researchers have successfully launched a hydrogen-powered drone designed to go where batteries fail. Hydrogen fuel cells solve the two biggest flaws of battery drone s: excessive weight and short flight times.
With a simple tank-swapping system and the ability to fly for several hours, these drones can effectively cover more ground than a human operator’s typical workday.“We weren’t looking to replace battery-powered drones. They are practical for a lot of things. Our goal is to solve the tasks that today’s drones can’t handle,” said Federico Zenith, a senior research scientist at SINTEF, a research organisation in Europe.Here, the drone is being tested on a field outside Trondheim. Credit: SINTEFReliable droneCurrent battery technology creates a literal distance limit. Today, if a tree falls on a power line in a remote mountain pass, utility companies often have no choice but to send a human crew up in a helicopter. It is expensive and dangerous. In high winds, it can be deadly.“If you need to find out if a tree has fallen onto a power line, you want to get out there as quickly as possible. Right now, you often have to use a helicopter,” said Zenith.Beyond extending flight time, the shift to hydrogen leverages the laws of physics to improve drone reliability. Hydrogen fuel cells provide a much higher energy density than heavy lithium batteries, reducing weight while remaining far more durable and lower-maintenance than complex gasoline engines. This efficiency is enhanced by operational speed: instead of waiting hours for a battery to recharge, operators can simply swap out a fuel tank in minutes to get back in the air.Despite these perks, the path to the skies wasn’t easy. Strict regulations make it difficult to retrofit existing drones with fuel cells. To bypass the red tape, the SINTEF team built its own craft from the ground up in its specialized drone laboratory.This extended range enables continuous, long-distance tasks such as inspecting power lines between distant transformers — missions that currently exceed the lifespan of a standard battery. Weatherproofing required The project is currently the only one of its kind flying in Scandinavia. However, it faces a uniquely Norwegian problem: the weather.Currently, the drone’s fuel cell is a fair-weather flier. It dislikes rain and struggles when temperatures dip below freezing. For a tool meant to monitor avalanches and winter power outages, this is a significant hurdle.“The most important tasks remaining are weatherproofing and winterproofing,” Zenith explained. “So far, this has been a fairly small, internal project to get the drone in the air. That is the most important thing. But we need to gain more experience and see how many hours we can keep the drone flying in Norwegian conditions,” he said.The team is now hunting for partners to help them harden the tech against the brutal chill. If they succeed, the days of risking pilot lives for a simple line inspection may finally be over.Apart from search and rescue, these high-endurance drones could prove beneficial for large-scale environmental monitoring and disaster prevention. Their extended range enables comprehensive mapping of vast territories, tracking snow levels to predict floods or hydroelectric output, and keeping a watchful eye on natural hazards such as landslides and avalanches.
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