Invisible Drones

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Pacific Historian
Jun 4, 2005
Orange County, CA

Can a surveillance drone be made virtually invisible? VeraTech, based in Minnesota, US, thinks so. And patent applications filed by the company explain how.

"Persistence of vision" turns the fast-moving rotors of any helicopter into a near-transparent blur, while the slow-moving body looks solid. Inventor Michael Dammar has come up with a way of making the whole body of an aircraft spin as it flies, turning it into a single blur in the sky. This would not evade radar but should help the aircraft avoid visual identification.

The so-called Phantom Sentinel aircraft is Y-shaped, consisting of a single long wing attached to two short aerodynamic extensions which each end in a propeller. And the weight is carefully balanced so that the centre of mass is positioned between the two extensions. When the motors are running, the solid part of the aircraft spins around this centre of mass, and the longer wing generates lift. The whole thing moves so fast that persistence of vision turns it into a single blur.

Making the plane sky blue, or largely transparent, should help conceal it further, Dammar claims. He adds that a camera can be placed near the centre of mass and used to build a panoramic picture of the ground below, after software processing.

VeraTech Aero Single Rotor Phantom Sentinel Product Sheet.pdf


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more than you realize, why have forward two legged recon when you can use a half dozen of these, and besides they can be expendable with pre-set detonators for self destruction. Drones are alreaday the size of a 1/72 a/c model and are being used overseas, mocking a bird in flight, low down and swooping upward

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