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Cd constant... or speed dependant?
Hi guys,
I didn't do a full theoretical investigation on this subject, so please forgive me for this lazy topic / question.
I've read in at least one thread here, that Cd is said to be quasi-constant at legal road speeds.
However, this doesn't align with my gut-feeling. If I'd compare a relatively short teardrop shape with a very long one, I imagine they can perform equally well at low speeds.
Maybe at 30 mph or so, even the short teardrop could get fully attached, laminar flow. But at 60 mph, I guess you'd need a longer teardrop to achieve a fully attached flow...?
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