Quote:
Originally Posted by aerohead
Some of the 'missing' half-body wind tunnel research models may be viewed with:
SAE Paper 2020-01-0673, at the SAE International website.
The paper can be 'previewed', and images seen within the Abstract at no cost.
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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.