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Downforce by cars body
03-28-2007, 10:58 AM,
#1
Downforce by cars body
Only wings can define an lift-coefficient. But most racecars generate an aerodynamic downforce with the car body.

Code:
[ drag ]
position = 0.0, 0.0, 0.2
frontal-area = 1.3
drag-coefficient = 0.56
lift-coefficient = -2.5
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03-28-2007, 03:27 PM,
#2
 
As far as I understand it, a negative lift value causes a downforce effect.
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03-28-2007, 06:12 PM,
#3
 
Yes, same as wings!
In reality things are more complicate: car-body-downforce depends much of the distance to the track.

The AX2 car has such a system, you can see the diffusor.
But defined is a wing-front, that doesn´t exist. The wing-rear is correct. A complete drag definition could include the car-body-effect:

Code:
[ drag ]
position = 0.5, 0.0, 0.2
frontal-area = 2
drag-coefficient = 0.3
surface-area = 4.0
lift-coefficient = -0.2






Normal cars generate positive lift.
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03-28-2007, 09:45 PM,
#4
 
What would be more realistic is to have a set of multiple [wing-part] declarations.

For a car with a front wing, a rear wing and a body shape that acts as a wing you could have three declarations:

[wing-front]

[wing-body]

[wing-rear]

This could be useful for other cars that have more than the normal front and rear wings as well... Don't even suggest modelling the interference of flows with turbulence... Wink
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03-29-2007, 01:22 PM,
#5
 
[wing-body] == [drag]

Another name...
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