Hello!
After more than a year of using great, OpenRC F1 designed by Daniel Noree, we decided to take on the challenge of designing a working aerodynamic package for the project, and here it is!

It's a package of working ground effect floor with sideskirts, diffuser and the rear wing having a working profile of both airfoils. It was tested in various car and pavement configurations. Also in the gallery, you can see the CFD simulations we conducted.
It literally sucks the car in when driving at high
speeds, what significantly improves stability at high speeds.
It was designed for Tamiya F104 tires, with limited test space, managed to establish a Vmax of 70kmh, which was achieved thanks to the stability generated by the downforce and very significantly eliminated the problem of spinning in corners. (Vmax could have been higher if we had found a longer test area).

We also designed the mount for a much larger and more powerful servo, which has more durability and does not get tired at high speeds.

Consider that floors that generate aerodynamic downforce must be suspended as low as possible above the surface. For this reason, the floor in our design has a clearance of about 5mm, small pebbles are not a problem, but we recommend driving on paved/asphalted areas.

We decided to release, for free, a diffuser that fits the original OpenRC so that everyone could use it. If you want to take a look at the entire aerodynamic package, it's available on Cults3D:
OpenRC F1 Advanced Aero Package

Recommended settings:

• Diffuser - (VERY hard TPU 96A, you can print it with PETG, but we do not guarantee long life of that part), 100% infill, layer 0.2
• Diffuser_Cover - 100% infill, supports, filament change on specific layer, layer 0.1
• Diffuser_Cover_For_LED - (transparent PLA, designed for 5mm blinking LED) 100% infill, no support, layer 0.1
• Wheel_Axle_Holders - 60% infill, layer 0.2