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
As far as I understand it, a negative lift value causes a downforce effect.
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.
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...
[wing-body] == [drag]
Another name...