Raja Ali Seo

By spinning 25 times per second, this experimental UAV exploits the limits of human vision to virtually disappear in flight. By Raja Ali SEO Expert | Published: July 28, 2026 Traditional stealth aircraft rely on expensive radar-absorbent coatings, high-tech light-bending metamaterials, or complex optical camouflage. However, roboticists at Northwestern University in Illinois have achieved low visibility using a far simpler visual trick: persistent motion blur . Dubbed the Phantom Twist , the prototype drone rotates around its central axis at a staggering 25 revolutions per second (1,500 RPM). That speed outpaces the human eye's ability to process sharp spatial detail , transforming the aircraft into a faint, semi-transparent smudge that effortlessly blends into the sky or landscape behind it. "Most efforts to hide drones focus on making them look like their surroundings," explained Michael Rubenstein , associate professor of computer science and mechanical engineering...