Why do we need down-pressure? F1,Formule 1, construct, okruhy, závody, grand prix | Constructors F1

etina English Rusky

Why do we need down-pressure? F1,Formule 1, construct, okruhy, závody, grand prix | Constructors F1 Constructors F1

Why do we need down-pressure?

Miroslav Sanytrák | 2.6.04 | Přední křídlo

F1 constructor

Why do we need down-pressure? - Pic. 1

Pic. 1

Any performance car is expected to turn fast. A car in a bend is pushed out by the centrifugal force, see OS in the pic.1. There are the friction forces between the tyres and the road, working against. As soon as the centrifugal force gets bigger than the total of the friction forces T, the car starts skidding, leaves the road or loses the ideal performance in the bend. The friction force may be obtained as T = f . NC, whereas f is the friction coefficient, NC is the component force taken from the car's weight and the down-pressure NA. The friction coefficient, f, depends mostly on the tyre's mix compositon, the intensity of NC then on the aerodynamic design of the spoiler and other details of the body and chassis. The weight component is usually determined by the given car weight.

Why do we need down-pressure? - Pic. 2  

Pic. 2

However, the component of the force given by the weight of the car may be reduced by aerodynamic lift emerging under the floorboard. Performance cars tend to be low to get the centre of gravity low. In short - at a certain - high - speed there occurs a phenomenon which may be described as an aerodynamic clogging (seeZ in the pic.2). It is caused by the depth of the foundary layer, in which the bypassing medium ‘flows' more slowly but the car surmounts this barrier with its power. The air pressure under the floorboard increases, the aerodynamic lift rises and tends to lift the car. It is this force that the spoilers must diminish. If the down-pressure is bigger, the friction forces between tyres and the road are bigger allowing the car to turn faster. Of course, this is just a simple diagram, because the bigger down-pressure the wing generates, the bigger aerodynamic resistance it has, therefore its maximum down-pressure in a bend does not always has to be an optimal solution. It may cause a major slow-down of the car in straight parts.  

Why we need adherence pressure? - Nose detail

Nose detail


Why do we need down-pressure? - A different nose

A different nose


Why do we need down-pressure? - Other type of nose

Other type of nose


Why do we need down-pressure? - And another nose

And another nose


Why do we need down-pressure? - Detail of another nose

Detail of another nose

Vaclav Kral 



The design formulas F1

Please choose the desired part of the 3D car!

Formule Zadní kolo Brzdy Svtla Zadní závs kol Zadní kídlo Podvozek Výfuk Válce Kamery Skelet Sedadlo Pední kolo Volant Zrcádko Pední závs kol umák Pední kídlo

In the next Formula 1 race left


Calendar GP F1

Copyright © (2021) Copyright © (2011) Constructorsf1.com