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Why airplane engines have swirling cones

HERE’S THE INTERESTING PART

Ground crews working on a noisy tarmac can easily lose track of which massive turbine is active and ready to suck them inside. The hypnotic white swirl painted on the central cone creates a visible blur when operating, warning staff to stay away from the invisible vacuum of death. It is a remarkably low-tech solution to a highly lethal problem.

Why airplane engines have swirling cones
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