Quote:
Originally Posted by daqcivic
...However, I don't know how that range of error would translate into Cd and mpg figures...
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If you can do some smoothing of the raw data from the coast down test, then the variability between consecutive readings can be reduced, based on your methods of smoothing.
I typically use a second order polynomial for smoothing velocity reduction data, and that technique works very well for the type of slope generated.
Think Excel has the ability to curvefit data, and I also think you can select the order of the polynomial generated. I use another program for curve fitting, so I'm not sure about Excel lately, but have used this feature years ago.
Jim.