Why do passing trucks suck instead of blow?
Nope, it's not the first line of a joke or a rhetorical question. I would expect a passing truck or bus to be pushing a wave of high pressure air in front and beside, but I've noticed time and agai...
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Same reason an airplane wing provides lift.
The air between the front of the truck and the back of the trailer must travel at higher speed. High speed corresponds to low pressure.
Try this, hang a piece of paper from a pencil and blow hard across the top. If you get the angle right, even though you are blowing, the paper will lift toward the air you are blowing.
The air between the front of the truck and the back of the trailer must travel at higher speed. High speed corresponds to low pressure.
Try this, hang a piece of paper from a pencil and blow hard across the top. If you get the angle right, even though you are blowing, the paper will lift toward the air you are blowing.
