Thread: drafting semi's
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Old 12-15-2011, 09:43 PM   #7 (permalink)
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Apollo 11 - '02 Dodge Ram 1500

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Last time I drove down the highway in the rain, I observed the spray in the air comming off the back of a semi in front of me.

I'm guessing it must be a rough indicator of the proportions of the hole they punch through the atmosphere and may give an idea of where the sweet spot is for drafting in other conditions. (Although I suspect the weight of the water vapor would tend to show a smaller clear pocket than in dry conditions.)
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