Quote:
Originally Posted by 3-Wheeler
I can see why Aerohead gave up on this sort of testing long ago, as he has already made mention of in the past. It will take some dedicated equipment to record enough data, and with enough consistency, to really add value to our aero endeavors at EcoModder.
Jim
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Thanks for the interesting and very thorough report. I have been affraid all along that some of the techniques we hold so dear don't render accurate results without considerable control and considerable data. I don't think any one could have exercised much more dedication than you have and I compliment you on your effort.
I have felt for a long time, since 2008 when I first joined, that the easiest measurement would be MPG improvement over long two way courses. With such controls as low wind, constant driving techniques, constant average speed, the small variations of conditions and driving technique average out if the course is long enough. I have achieved good repeatability with this technique. True that it doesn't serve up the number we would all like to get - the improved Cd - but it does point to which mods work and relatively how well they work.