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Old 08-07-2017, 08:36 AM   #4 (permalink)
JRMichler
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Join Date: Feb 2011
Location: Phillips, WI
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Nameless - '06 GMC Canyon
90 day: 37.45 mpg (US)
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CFD (computational fluid dynamics) models are only as good as the highly skilled analysts who use them. They spend a lot of time "verifying the model". This is analystspeak for adjusting the inputs until the model gives correct answers. The verification needs to be done on a model that is similar to the problem under study and where the solution is well known. Wind tunnels will not go away any time soon.
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The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
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