Scott,
there was a discussion before on this issue and I wrote a long explanation
about groundeffect and Kamm rear end - as I remember there is a archive from
all this e-mails off this list.
Check this archive, may be you will find the answer, otherwise you can contact
me off list with some picture from your car and idea, to be sure that I can
write you the correct answer.
Groundeffect, downforce, drag behind the car - this is a very complex issue.
As I understood from your note, you like to create something like a ground
effect tunnel, there exist a rough mathematic rule - means the percentage of
the different shape areas from the tunnel. Let me know if you need this, I can
send them than as attachment.
see ya
Pork Pie
Scott Cowle" <SCowle@mentorcollege.edu> schrieb:
> I have been trying to learn more about the effects of the low pressure area
>behind a car that is left there when a car moves through the air, and trying
>to imagine ways to efficiently fill this area so it doesn't act as a drag or
>destabilizing effect on the car. Can anyone shed light on the subject as to
>how different efforts have tried to eliminate this low pressure. Is it safe to
>assume that was the logic behind the boat tail cars. Also, what would be the
>effects if one were to run some kind of tubing from the headlight area back to
>the tail light area so the air is effectively passing through the car and
>exiting in this low pressure area. I watched a take off of an "Intruder" I
>think it was an intruder and I noticed the air intakes protruding from the
>side of the aircraft. Could something like this be used to redirect air
>through the trunk of the car to the back of the car without creating as much
>drag as at the back of the car. We are toying with the idea of building a!
> Dodge Shadow with a 340 small block , where the engine will be moved back,
>as will the driver-in sort of a funny car type position, but I want to make
>this a stable car- so its going to be low and have an aero package of some
>type but I don't know what yet.Its November and now is the time to play with
>ideas for next time I get down to where the fun is.
|