Thread: Weird MPG
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Old 08-04-2022, 08:30 AM   #4
Dadhawk
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I'm on team wind as well, depending on how hard it was blowing. The rule of thumb I've seen is you lose about 13% efficiency for every 10MPH of headwind. Of course, if what you have is a crosswind, the calculation gets a little complicated, and I've never attempted to do it for a car. (I've calculated crosswind component for an aircraft but that isn't what we are talking about here).

To get a precise calculation it would involve the drag coefficiency of the particular model car and a bunch of other variables. I know about it in theory but have no idea how to calculate it.
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