Hello,
Quote:
Originally Posted by lunarhighway
yes sure, but that's the catch, total aero drag is frontal area (in square feet or meter) multiplied Cd
this is gives you a CdA
a tiny car with a 0.32 Cd might have less overall drag than a prius, just because the prius has more frontal area...
frontal area determins how much air will have to be pushed around the car, drag quoeficient how smooth this will go
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Right, I understand that. My comment was towards what some posts seem to be saying: that just because a vehicle is taller, means that it must necessarily therefore have a higher drag coefficient.
The OP does list an item saying that "...lowering by 20 mm reduces Cd by 0.01" which implies that this is a linear affect. I can't see how this could be a constant? All else being equal, lowering a vehicle only reduces the frontal area of the tires only.
Both the Boxfish and the Aptera are relatively tall, and they have much lower Cd than almost any other vehicle; so height is only one possible factor in the Cd.