Quote:
Originally Posted by jimepting
Jim, are you going to make an appearance anywhere this summer with your Insight boat tail?
Have you been able to reach any conclusions about Cd from your coast down measurements?
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Yes, I may end up going to the Madison HybridFest this year.
As for coast down testing, I literally spent hundreds of hours examining the data and discovering that the GPS does not have the quality of data necessary to reach concrete numbers.
It does show some trends between the extreme cold in the winter versus the hot weather in the summer, but as for determining the difference between the tail and without, that could not be determined with the GPS.
I think to do a proper coast-down, one would need a much better way to record actual speed reduction with much more accuracy.
Jim.