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Old 02-01-2009, 10:38 PM   #8 (permalink)
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Originally Posted by Formula413 View Post
55-65 was done on the highway, 40-45 was on a rural road. It was not a particularly windy day, but as I said I made runs in both directions, so wind should have been pretty much eliminated as a factor.
It would minimize the factor but not eliminate it.
The wind gains won't exactly match the wind losses.
The same is presumably true for the variation in slope of the roads.

If you were able to do 50 mph runs on both roads, you could correlate the two data sets, but as is an addition margin of error has been introduced. Perhaps +-0.1 mpg???
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