WRC Testing

[dimviii]

another one who cant find a difference between yaris, c3 and fiesta 2017.

[Mirek]

Yes, bad english

Example, bobsleigh as i know quite much how works, the drag effect behind the sled gives 3x the resistance that what the front do. Thats the reason a big wing, or a "high downforce" front can do more bad than good. Of course, sideways in the forrest is also a factor.
I'm a cabinetmaker and "has been" bobsledder, not wery familiar to technical english, so i have a little problem to write what i have in my head

Actually the high downforce at the front is very very important for any kinf of motorsport (if it's allowed by the rules) because by the front wheels you steer. The tyre grip is somewhat limited and same for all. Adding weight upon the front wheels isn't very good idea because the weight has also a a lot of inertia. So the way to win turning speed and to reduce understeering is to add more downforce. What is very important is that anything at the front adds less drag than similar feature at the rear. Therefore you can win a lot by adding downforce at the front.

The downside is that those aerodynamic features at the front are somewhat impractical for some rally specifics like driving in deep snow, through water splashes etc.

[skarderud]

Actually the high downforce at the front is very very important for any kinf of motorsport (if it's allowed by the rules) because by the front wheels you steer. The tyre grip is somewhat limited and same for all. Adding weight upon the front wheels isn't very good idea because the weight has also a a lot of inertia. So the way to win turning speed and to reduce understeering is to add more downforce. What is very important is that anything at the front adds less drag than similar feature at the rear. Therefore you can win a lot by adding downforce at the front.

The downside is that those aerodynamic features at the front are somewhat impractical for some rally specifics like driving in deep snow, through water splashes etc.

Yes, of course the downforce in front is important.
What i trying to say is that if a front end that is "wrong" designed, like if it is perfect in a CAD simulator "separeted" from the rest of the car, it can make lots of turbulance(?) that will ruin some of the effect behind the car. It is interesting also how much this work at slow speed, like 100km/h, if its right.
This is much easier to explain in Norwegian! not shure it been totaly understandable this time eighter

Sent fra min XP7700 via Tapatalk

[Mirek]

Now I understand. Yes, I agree. I know that a tiny student formula car of my Alma Mater generates around 60 kg of downforce at 80 km/h (if I remember right) and that's a thing only a little bit larger than a go kart.

[Andre Oliveira]

https://twitter.com/rallycaptures/st...21962948972545

[Andre Oliveira]

https://www.facebook.com/andrew.hump...54139863253157

[GigiGalliNo1]

Could someone please recall and remember what some on here thought of the Korean i20 Hyundai, you know that white one many years ago that launched in Korea and they drove it on a test frack just sliding it... did it look like a winning car? It was a joke right?

[Mirek]

Could someone please recall and remember what some on here thought of the Korean i20 Hyundai, you know that white one many years ago that launched in Korea and they drove it on a test frack just sliding it... did it look like a winning car? It was a joke right?

That was in completely different phase of development. In that time it was made just for show and there was a lot of time to the first start. Now we are in already running homologation process, i.e. everything major has to be sorted out already.

[Andre Oliveira]

[dimviii]

Ogier and Tanak
https://www.facebook.com/media/set/?...3&l=25bb74f6ec