If you've ever traveled on a commercial airplane, there's a likely chance you've noticed those little white swirls in the center of those engines on the wings. It may seem straightforward: to keep people on the ground advised when the turbofan is spinning, right? But that doesn't explain everything.
If you've ever traveled on a commercial airplane, there's a likely chance you've noticed those little white swirls in the center of those engines on the wings. It may seem straightforward: to keep people on the ground advised when the turbofan is spinning, right? But that doesn't explain everything.
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