Northwestern's Phantom Twist drone appears nearly invisible

Engineers have unveiled a drone that uses rapid spinning to become nearly invisible to the human eye, a novel approach to stealth that focuses on manipulating perception rather than traditional camouflage. The device, named the Phantom Twist, was developed by a team at Northwestern University and presented at the Robotics Science and Systems 2026 conference in Sydney, Australia, on July 16.

The drone achieves its low-visibility effect by rotating its entire structure up to 25 times per second, a speed too fast for the human visual system to resolve. This motion blur transforms the drone into a faint, semi-transparent smudge that blends into its background. Michael Rubenstein, who led the project, explained that while most efforts to hide drones focus on making them look like their surroundings, his team designed the drone around the way humans perceive motion.

The key innovation is a departure from standard quadcopter design. Instead of a stationary body with spinning rotors, the Phantom Twist uses a single motor and propeller, with the entire body spinning in the opposite direction. This eliminates any stationary parts that would remain clearly visible. Emma Alexander, a...