Quote:
Originally Posted by kach22i
I was doing a little research on Cd, scale, models and Reynolds numbers and found this paper.
This is curious, the "Estate Back" (think of a Chrysler 300 wagon) has a higher Cd than the "Fastback".
http://delphi.com/pdf/techpapers/2012-01-0168.pdf
Based on doing many many template overlays and just eyeballing it, I'd have to say the Estate Back fits the template, and the fastback falls short.
What's going on here? |
Good paper. The thing that caught my eye was this chart of data.
Could someone please explain it? I don't understand what the Cp is so needless to say it is difficult to know what the lines stand for. At first I thought it was simply the pressure, but the data does not add up if this is the case cause I don't see how the pressure could be higher at the rear glass area of a notch back than an estate. So the Cp must be some other derived number, or something.