Japan’s Drone Takes Direct Hit from Lightning—and Survives
In a groundbreaking development, Japanese researchers have successfully tested a drone capable of withstanding and redirecting lightning strikes. This innovation aims to protect infrastructure and explore potential energy harvesting from lightning.
Engineering a Lightning-Resistant Drone
The drone, developed by Nippon Telegraph and Telephone Corporation (NTT), is equipped with a Faraday cage—a metallic enclosure that guides electrical charges around the drone, safeguarding its internal components. In December 2024, during a storm in Shimane Prefecture, the drone ascended to 300 meters, tethered by a conductive wire to the ground. Upon activation, this setup successfully attracted a lightning strike. Despite partial melting of its protective casing, the drone remained operational and continued to fly.
Implications for Infrastructure Protection
Lightning poses significant risks to infrastructure, causing fires, power outages, and equipment damage. Traditional lightning rods offer limited protection, especially for structures like wind turbines and open-air facilities. NTT’s drone offers a mobile solution, capable of being deployed to areas at risk, thereby enhancing protection against lightning-induced damages.
Exploring Energy Harvesting
Beyond protection, researchers are investigating the feasibility of harnessing energy from lightning strikes. While capturing and storing such immense energy presents challenges, advancements in energy storage technologies may eventually make this possible. NTT is exploring methods to convert the energy from lightning into usable forms, potentially offering a new renewable energy source.
Future Prospects
The successful test of this lightning-resistant drone marks a significant step in both infrastructure protection and renewable energy research. As technology advances, such drones could become integral in safeguarding critical infrastructure and exploring alternative energy sources.
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