Here are a few questions I have, since I see there are not that many posted in the thread:
Blunt fronts, versus pointy front ends.
These two cars have the exact same cD ( nevermind cDxA in this example )
This car you tested had a .201 cD
, yet this other one had a .21 cD - so actually higher !
Of what importance is a "pointy" front end at normal road speeds ?
How does the increase in pressure on a blunt front effect drag ?
In these examples, the car has a very blunt front :
How does the air stay attached with such sharp edges at the corners ? ( in green )
And on this other car, how does air remain attached, despite the flat, upright windshield ?
On the example Camaro above, there is also a large portion of the tire exposed to the wind ( in green on the image ) Gary tested some side spats that one would think would deflect air away fron this area, yet they did not change the cD.
Finally, since the Lexus LS430 had such a good cD ( the .25 example at the start ) yet has a 3 box design, could the car do even better with a boattail ?
( silly looking, yes, but as an example )
All these questions have been covered on this forum , but I would like your opinions as well.
- Thanks !