- Volcanic minerals may allow ordinary drones to evade advanced radar detection systems
- Stealth Spray Coatings Could Eliminate Expensive Composite Panels From Military Drone Manufacturing
- Radar networks become less effective as drones return with dramatically weaker electronic signatures
A small Turkish defense research company claims to have developed a spray-applied radar-absorbing coating capable of reducing the visibility of drones to modern detection systems.
The project, led by Turkish researcher Yunus İnce, focuses on a material called Kürşat 3.0, developed during a seven-year engineering effort.
According to technical details, the coating is applied directly to aircraft surfaces rather than relying on expensive invisible composite panels or complex structural modifications.
Volcanic materials may change how low-cost drones avoid radar detection
Kürşat 3.0 uses basalt and pumice, both volcanic rocks, as main ingredients instead of exotic synthetic compounds.
Recent tests reportedly produced an attenuation of 43.2 decibels (dB), a dramatic reduction in the intensity of a radar signal reflected back to the receiver.
In practical terms, this means that the radar echo from the coated drone is approximately 20,000 to 40,000 times weaker than that of an uncoated object of the same size and shape.
An attenuation figure of 43.2 decibels would put this material in truly competitive territory if independently confirmed.
Academic literature typically reports effective broadband radar absorption in the range of 20 to 30 decibels under standardized conditions.
Substantially exceeding that threshold while maintaining the simplicity of a spray application would represent a significant advance over commercially available products.
At 43.2 dB, a drone that should be visible for several kilometers with a strong and trackable return signal would disappear completely from the radar screen or appear only at such a short distance that the defense system would have practically no time to react.
In military terms, this reduces the scope of detection and engagement from a comfortable buffer zone to a frantic last-second warning.
Radar stealth conventionally requires carefully formed airframes or expensive composite panels joined together by specialists.
This material works differently by exploiting the microscopic pore structures found in basalt and pumice.
These natural cavities trap incoming electromagnetic waves and convert them into heat instead of reflecting energy back to the radar receiver.
The underlying scientific principle has attracted academic attention for more than a decade, making the approach more plausible than fanciful.
A sprayable formulation eliminates seams and coverage gaps that plague traditional composite panel installations on complex curved surfaces.
Why do we need drones with very low detection?
The war in Ukraine has shown that drones costing a few thousand dollars can destroy armored vehicles and disrupt supply lines on a large scale.
Defenders have responded by expanding radar networks and electronic warfare systems designed specifically to find and kill such drones.
Reducing a drone’s radar signature complicates each stage of that detection chain, and doing so with a coating that adds negligible weight would make stealth accessible to operators using commercial hardware.
Turkey’s defense industry has already demonstrated with the Bayraktar TB2 that affordable unmanned systems can reshape battlefields before Western analysts fully appreciate the change.
However, at the time of writing, no independent testing has verified this technology and the relevant radar frequency bands for operational use remain unspecified.
Extraordinary claims require extraordinary evidence, and a single attenuation figure from unpublished evidence does not yet meet that standard.
Volcanic materials themselves are cheap and abundant, which is scientifically reasonable.
But laboratory measurements rarely survive translation to field conditions with real-world vibrations, weather, and radar frequency variations.
Until independent verification appears in the operationally relevant bands, Kürşat 3.0 will remain an intriguing research result rather than a military advance.
Through Defense Blog
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