Northwestern Builds 30-Gram Drone That Hides at 25 Revolutions a Second
Updated
Updated · New Scientist · Jul 16
Northwestern Builds 30-Gram Drone That Hides at 25 Revolutions a Second
3 articles · Updated · New Scientist · Jul 16
Summary
Phantom Twist fits in a palm and can currently only hover, using a full-body spin to turn its structure into a faint blur that can blend into matching backgrounds.
Three AI stages produced the design: millions of concepts were cut to about 20,000 flyable options, then refined for low visibility and scored by a model mimicking human sight.
Researchers and outside experts said the effect exploits limits of human vision rather than true invisibility; at high speed, the brain merges the drone's moving parts with the background.
The same spinning layout also constrains the aircraft: extra sensors or payloads would make it easier to spot, while gyroscopic forces make sharp turns difficult and scaling up could risk structural failure.
The team presented the work at the Robotics: Science and Systems conference in Sydney and said transparent parts and finer AI optimization could reduce visibility further.
If this 'invisible' drone can’t carry much or turn quickly, what practical problems can it actually solve?
Is a drone that's just a noisy, transparent blur truly 'invisible' or simply a clever but impractical optical illusion?
10x Less Visible: How Northwestern’s Phantom Twist Drone Redefines Stealth with Motion Blur Technology
Overview
Northwestern University has introduced the Phantom Twist, a prototype drone that uses high-speed rotation to achieve near-invisibility. The drone spins at about 25 times per second, with its main body rotating in one direction and internal components moving in the opposite direction. This counter-rotation creates an optical illusion, making the drone appear as a faint haze or ghostly shape to the human eye. By blurring its form through rapid, opposing movements, the Phantom Twist represents a new approach to stealth technology, moving beyond traditional camouflage and making it much harder to detect against various backgrounds.