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drag behind a car

To: <land-speed@autox.team.net>
Subject: drag behind a car
From: "Scott Cowle" <SCowle@mentorcollege.edu>
Date: Wed, 09 Nov 2005 10:23:13 -0500
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.
                                                                                
 Scott


 
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