Downforce by cars body - Printable Version

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Downforce by cars body - cologne - 03-28-2007

Only wings can define an lift-coefficient. But most racecars generate an aerodynamic downforce with the car body.

[ drag ]
position = 0.0, 0.0, 0.2
frontal-area = 1.3
drag-coefficient = 0.56
lift-coefficient = -2.5

- thelusiv - 03-28-2007

As far as I understand it, a negative lift value causes a downforce effect.

- cologne - 03-28-2007

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:

[ 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.

- reece146 - 03-28-2007

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:




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

- cologne - 03-29-2007

[wing-body] == [drag]

Another name...