“Invisible” Drones Proposed

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If the unmanned aerial vehicles (UAVs) now in the air are such a danger to other aircraft that they have to fly in restricted airspace, how potentially dangerous would an “invisible” drone be? That’s not likely one of the factors being considered as VeraTech, a Minnesota company, continues work on an aircraft that uses the principle of “persistence of vision” to make the drone appear to be nothing more than a blur against the sky. (Persistence of vision is described as what makes spinning propellers seem to disappear before our eyes.) VeraTech’s plan is to make the entire aircraft spin fast enough that the human eye can’t get a clear picture of it. As you might expect, it’s a strange-looking contraption with a Y shape and the engines mounted at the end of each branch. The center of gravity is just behind the crotch of the Y and there’s a single wing sticking out from there. The thing rotates about the center of gravity and there are now flying models being tested. VeraTech says cameras could be mounted on the drones and provide panoramic images, after decoding by a computer.

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