Phantom Twist: The Nearly Invisible Drone Using Motion Blur
Engineers at Northwestern University have developed the Phantom Twist, a drone that exploits motion blur to become nearly invisible. Designed by AI, it is reportedly ten times less detectable than conventional drones and could be used for wildlife observation and infrastructure monitoring, despite limitations like propeller noise.
A nearly invisible drone using motion blur
Engineers at Northwestern University have designed a drone capable of almost entirely disappearing to the naked eye. Named Phantom Twist, the device exploits a simple optical principle: motion blur. When an object spins fast enough, the human retina can no longer distinguish it. It merges the images into a translucent mass, like the blades of a rotating fan.
The drone spins on itself between 15 and 25 times per second. At this speed, its nearly transparent body and opaque components—motor, battery—blend into the landscape. Unlike conventional quadcopters, the Phantom Twist has only one propeller. It rotates in one direction, while the rest of the structure pivots in the opposite direction. No fixed part remains visible, eliminating the usual visual cues.
Tests show that the device is reportedly ten times less detectable than a conventional drone. It blends in just as well against a clear sky as in dense foliage. Its relative invisibility also applies to certain animal species, whose visual perception relies on thresholds similar to those of humans.
Design by artificial intelligence
The shape of the Phantom Twist was not conceived by humans. An artificial intelligence generated nearly 20,000 possible configurations, testing each arrangement of parts. Algorithms then optimized the position of the motor, propeller, printed circuit, and counterweight to ensure stable flight.
The 500 most promising versions were superimposed on a hundred real backgrounds. A model simulating human vision assigned a visibility score to each. The least detectable configurations were selected and refined through successive iterations. Michael Rubenstein, a professor at the McCormick School of Engineering, states that the process occurred without human intervention.
Potential applications and limitations
The drone was presented on July 16, 2026, in Sydney at the Robotics: Science and Systems conference. Its designers envision two main uses: wildlife observation and infrastructure monitoring. A nearly invisible device could allow studying animals without disturbing them or inspecting bridges and power lines without drawing attention.
However, the prototype has several flaws. It requires an external camera system to navigate space. Its wires and support rods remain visible. Most notably, its propeller produces significant noise, reducing its effectiveness for animal observation. Many animals, with faster retinal persistence than humans, would perceive the drone as a distinct object.
The Northwestern team plans to use more transparent materials and a quieter propulsion system. For now, invisibility remains partial: the Phantom Twist is less visible but still audible.
Key Points
- The Phantom Twist uses motion blur to become nearly invisible to the naked eye
- Designed by an AI after testing and optimizing 20,000 configurations
- Reportedly ten times less detectable than a conventional drone
- Potential applications: wildlife observation and infrastructure monitoring
- Limitations: propeller noise, visible wires, dependence on external cameras
- Presented in July 2026 in Sydney at the Robotics: Science and Systems conference
Sources
- Korben - "This drone spins so fast it becomes almost invisible". (secondary)
- Science et Vie - "Almost invisible, this AI-designed drone could transform wildlife observation". (secondary)
- Sciences et Avenir - "The 'Swirling Phantom,' a nearly invisible drone". (secondary)
Transparency: 3 sources (0 primary, 3 secondary). Verification: July 27, 2026.
Truthyx - July 27, 2026