Northwestern Phantom Twist Drone Achieves Optical Invisibility via Ultra-High Rotational Speed.
ENGINEERING BREAKDOWN: Researchers at Northwestern University have demonstrated “Phantom Twist,” an autonomous single-propeller drone that achieves optical low-visibility without stealth coatings or transparent polymers. By spinning around its central axis at 25 rotations per second (1,500 RPM), the aircraft exploits human visual persistence thresholds to dissolve into a semi-transparent blur. 🔬 THE PHYSICS OF PERSISTENCE-BASED … Read more