Quote:
Originally Posted by aerohead
Aeronautical engineers don't typically use projected frontal area-based drag coefficients.
* They may use wetted-area-based coefficients.
* They may use volumetric displacement-based coefficients.
* All components of an aircraft can be calculated individually, then added together, plus an estimated interference drag component.
* Typically, they resolve total aerodynamic drag into that of an equivalent flat plate, flat into the 'wind.'
* Sometimes they've used flat plate area sliding parallel to the streamlines, both sides.
* All calculations are for 'flight conditions,' maybe cruising at 41,000-feet altitude Above Ground Level/ Above Sea Level.
It's a nightmare!
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We're talking about a car, not an aircraft. Why do you assume that Chrysler engineers were using an aircraft approach? There's nothing in the paper to state that, as far as I am aware.