Quote:
Originally Posted by JulianEdgar
A very significant paper for those developing vehicle shapes from scratch. It also puts the Kamm tail in a new light and shows very well how rear body drag is a complex mix of pressures caused as the airflow follows downwards-curved surfaces, pressures caused by edge vortices and base pressure.
A good example of how relying only on historic data and analysis can give quite poor understandings.
Thanks for bringing the paper to our attention.
Unfortunately, the preview section shows only a historic wrap-up - the guts of the paper are on pages 7 - 10.
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* Koenig-Fachsenfeld has all the original raw data.
* One takeaway for the global audience is that, the early investigators began with the entire half-body, then examined the ramifications of each truncation, quantitatively.
* The 2016 Cd 0.19, Mercedes-Benz IAA is a recent example in which the automaker 'adds back' some of the 'missing' length to obtain lower drag, while maintaining 'parkability' in a contemporary garage. A 1930's concept.