AR3-GP wrote: ↑25 Feb 2023, 03:20
In this case, do you know why the original launch spec AMR22 and Alfa Romeo C42 were such awful cars? Those cars arguably had much more sizeable undercut than then RB18/RB19. People were calling those cars "double floor" cars.
I was actually talking about the small side undercut on RB18, that way RB was controlling exactly which portion of the air is going into diffuser. They've made the undercut bigger on RB19 and that also has a lot to do with floor edge treatment, there is clearly big and important interaction there.
Teams that had a big undercut on launch spec cars all had trouble and that has a lot to do with guiding the air towards diffuser mouse hole. The clean air close to the tub ended up around the beam wings on those cars, while RB18 led it to diffuser, where it helped their floor design more. Who knows what kind of turbulence ended up in early Sauber and AMR diffusers...
Right now, RB19 reduced their outwash a bit, but they still have a good amount of clean air between front tyre wake and diffuser mouse hole, so they have that covered. They chose a specific floor edge treatment, made the sidepods even more streamlined in one area and reduced drag obviously. Not a bad evolution of a successful concept.