Just_a_fan wrote:chuckdanny wrote:i would basically understand that the less you disturb the air, making it to work for your own purpose that is creating downforce hence as a by product upwash only and not sidewash.
You can't create downforce without disturbing the air. Sadly, the method that gives least drag is the one that the teams can't/won't play with - the methods they do use (wings, brake duct flips etc.) make downforce and disturb the air a lot whilst doing it.
The open wheels don't help either...
that's what i said, the purpose is creating downforce that is downward momentum in equilibrium with reaction forces from the tires and the byproduct of this is inevitable upward momentum of the air what i call upwash, which of course is a big disturbation of the air. But you don't need to work the air laterally so sidewash is a byproduct without benefits ! Well that's not completely right because they use sidewash at the bottom of the sidepod and with the front wheels endplate for exemple to protect the upward and downward facing faces of the diffuser from the dirty air coming from the front wheels but that's the general idea. For the rear wing placed further up you don't need sidewash, it's of no practical use. PLus, you could benefit from an upstream sidewash that would bend downstream to fill the void created by the three plane device that create massive downforce at the rear, diffuser, rear wing and flap and because the relative depression at the back coming from this general movement is generating drag.
Most sports car use lateral air to fill the gap behind because to let it be filled by the air coming from the roof has a negative effect in term of overall downforce. I mean think of the general form of a car above ground, it's basically a wing facing in the wrong direction that is creating the opposite of downforce. A car that would have half the form of a drop of water at the back and straight sides like walls without bending would be a nightmare in term of downforce except if you work the air with a rear wing because it's the general profil of an extrados.