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Old 02-19-2010, 09:10 PM   #13 (permalink)
3-Wheeler
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Quote:
Originally Posted by daqcivic View Post
...However, I don't know how that range of error would translate into Cd and mpg figures...
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.
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