What is the sound of one piston slapping?
What is the sound of one piston slapping?
Illustration for article titled what is this thing i saw that i dont have a photo of?

it was attached to a wheel on a tractor trailer. It was maybe 8"-10” in diameter and about the depth of the wheel. It looked like a wire trashcan you might see in a park

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Illustration for article titled what is this thing i saw that i dont have a photo of?

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