Quote:
Originally Posted by jimepting
RobertSmall's proposal looks to be about a 30-40% chop, if one degrades it a bit for the upward slop of the bottom, so he is looking at something like 20 % drag increase from the perfect template.  The stock Insight looks to be something like a 70-80% drag increase from the template. |
I can't study this thread tonight, but I had to at least crunch these numbers.
If the stock Insight's drag is 75% greater than that of a full length streamlined car, then the latter has a Cd of 0.14 or so. Apply a 20% penalty to this, and you have 0.17. These numbers use a baseline Cd of 0.25, which is a stock Insight with mirrors, grille openings, and stock underbody coverage.