Quote:
Originally Posted by aerohead
* ' the drag reduction from an elongated tail varies almost linearly with the reduction in cross section area.' SAE 2020-01-0673
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Sure
Quote:
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* Any porosity would only compromise the effect. Voids cannot sustain pressure.
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Only if you think that's how box cavities work. I don't think that - because they reduce drag even when the extensions are not angled inwards and so when there's no reduction in cross-sectional area.
It's the old thing - to a hammer everything looks like a nail. Or, once you have a theory in your mind, you want to apply it to everything.