File image.
Russia has tested a tethered aerostat barrier designed to protect oil refineries and other critical facilities from drones, according to a report by war correspondent Alexander Rogatkin for Vesti, aired on the Vesti Nedeli program on the Rossiya 1 television channel on October 4.
The system uses several tethered aerostats connected by cables, with vertical cords suspended between them to form a barrier intended to catch incoming drones.
During the test shown in the report, two aerostats, each with a volume of about 150 cubic meters, were raised roughly 100 meters above the ground and connected by a 100-meter cable structure known as an “apron.” A fixed-wing drone was then sent toward the barrier. Its propeller became caught in the cords, damaging the drone and leaving it entangled and hanging from the structure.
The report presented the test as a demonstration of a passive method of physically intercepting drones approaching protected sites.
The cords are made from Kevlar, a lightweight aramid fiber with high tensile strength. According to the report, individual cords can withstand loads of up to 800 kilograms, while their spacing can be adjusted depending on the size of the expected target. The thin cords are also difficult to see against the sky.
The anti-drone aerostat system is currently being developed by the Russian research and production company Spets-Radio.
Sergei Bendin, head of the Moscow branch of the Russian Geographical Society’s aeronautics commission, said the barrier could use vertical cords spaced about 1 meter apart to protect facilities from drones.
The report said automatic winches can adjust the height of the aerostat barrier after a drone is detected and its flight altitude determined using radar or optical systems.
Ruslan Maksimov, head of the flight operations department at Spets-Radio, said more than ten aerostats would be needed to protect an oil refinery. The Kapotnya refinery in the Moscow region was cited as an example.
Rogatkin linked the system to the use of barrage balloons during the world wars. Similar aerial barriers were deployed over Moscow during World War II to obstruct attacking aircraft, providing the historical model for the system now being tested against drones.
The system highlights the immense efforts Russia is making to counter the threat posed by drones with active and passive measures.
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