Hey falks,
I've desided to share what I've designed for my Jerby car, and thought maybe you can use it in your models as opposite to this stupid square that they have now.

What it does:
- Creates the downforce
- Removes aerooscillations on high speeds
- Improves the aero-stability of the vehicle

Aerodynamical performance:
- Optimised for maximum lift-to-drag ratio
- Best angle of attack is 11-14 degrees, so ! Position it correctly upfront the vector of the wind (If you have something like 15 deg pitch for the back of the car, it has to sit -1 - -4 deg between the wing chord and horisontal line, cos wind current line is actually parallel to the skin of the car and not the ground, see attached picture for explanations)
- Aerofoil S821 SERI optimised for these Reynolds numbers
- Theoretical performance is brilliant (like F1 spoilers)
- Tips are Boeing wing-style (was aimed to try doing it with the same principle at least)

NOTE: It is the push-wing, so it creates a downforce! not the upforce like normal wing

Enjoy

Put some credits if you are using it pls.