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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
Reply
03-28-2007, 03:27 PM,
#2
 
As far as I understand it, a negative lift value causes a downforce effect.
Reply
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.
Reply
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
Reply
03-29-2007, 01:22 PM,
#5
 
[wing-body] == [drag]

Another name...
Reply


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