Drone spins into near invisibility

Engineers at Northwestern University have developed a prototype drone, the Phantom Twist, designed for near invisibility. Instead of using camouflage, the drone spins its entire body at speeds up to 25 times per second. This rapid rotation blurs its form so effectively that it becomes a faint smudge, approximately ten times harder to detect than standard quadcopters.

The drone's unique design features a single motor where the propeller spins in one direction and the airframe spins in the opposite direction. This eliminates any stationary component that the eye could lock onto. To achieve stable flight with such extreme rotation, an AI design pipeline analyzed 20,000 potential layouts.

This AI process optimized the placement of key components like the motor, propeller, circuit board, battery, and counterweights. The designs were simulated against various backgrounds and scored based on human vision models. While currently a research prototype, it highlights innovative approaches to reducing observation impact on wildlife and infrastructure inspection.