Quote:
Originally Posted by Cd
Correct me if I'm wrong, but my understanding was that frontal area had nothing to do with cD.
That number is the cDxA figure.
BTW, I always thought of the Karmann Ghia as a tiny car.
That was until I got a scale model of one and a Golf.
The two cars are about the same size.
Regarding the high drag figure on the new Prius, I'd like to ask what you all think is the cause.
Sure the fenders are flared, but not enough to disrupt attached flow.
The wheels are larger, but air curtains and lots of attention to the area can fix this. ( Thinking back once again to the 81 Camaro tested at A2 wind tunnel at .201 cD. The open wheel area was absolutely massive )
Is it that twisted beltline ?
I just don't get it.
Good aero is a bragging point on the Prius, and I would have thought Toyota would have got that figure down to something respectable.
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The drag coefficient is dimensionless. Theoretically, from a HOT WHEELS to the real thing, the Cd would be identical, as long as critical Reynolds number was maintained.
Although THAT would be challenging at the HOT WHEELS scale ( Way beyond subsonic velocity with compressibility shockwave effects ).
