Rally2 (ex-R5) News

[Mirek]

It could be interesting to search for exact regulations to see if it is allowed to have a connection between the wing and the bodyshell which has an aerodynamic function. The aerodynamic details are always kind of shady area with many questionable prepositions in the regulations. The good example is wheel arches of Fiesta S2000 which clearly were designed to create additional aero downforce despite that it's not allowed by the rules. I guess the reasoning in that time was in a way that every wheel arch from its nature affect aerodynamics and therefore all of them are technically illegal if the rules are taken literally.

[Iraquiano]

As far as distance is concerned, usually the further you are from the disturbing body, the 'cleaner' your flow is. Despite that, in that area, you also have to pay attention to the flow you leave to the rear of the car. So that rear wing should provide downforce but also direct the air to the back of the car. For sure they studied it, it depends a lot on the shape of the bodywork of the car, so what works best on the Hyundai may not work so good on the Peugeot for example.

[Mirek]

I have found on my disk ten years old homologation regulations for S2000 cars. Of course it may have changed through time but this is what I have (unfortunately without picture). It seems the rules changed because the assembly on Hyundai car seem to be biger than 200 mm in height.

- Rear aerodynamic device
The car’s original device must be removed.
One single device must be present. This device must respect the dimensions defined by drawing n° 2 and Appendix 3.
For two-volume cars, if the device is mounted on the top of the tailgate, the compliance with the 75 mm dimension is not mandatory.
This device must be rigid and offer no possibility for the penetration of air (groove, hole, opening, etc.).
The wing must be made in one single piece (a single profile and no adjustment flap in conformity with Appendix 3), and must be straight in all its dimensions.
The device must be totally contained within the frontal projection of the car without its wing mirrors.
The complete assembled device must be contained, together with its supports, within a box having a width of 150 mm and a height of 200 mm.
The maximum chord of this wing is set at 149 mm +/- 1 mm.
The distance “a” of at least 100 mm will be checked at 0° of incidence.
The maximum width of the single Be 183-176 type carrier profile (see Appendix 3)must not exceed 1200 mm and this profile may be adjustable.
A manufacturing tolerance of +/- 0.5 mm will be applied for measuring the profile.
This tolerance must be random between two consecutive measurements.
The trailing edge may have a thickness of 2 mm.
Attachment onto the glass is prohibited, only support is authorised.
The side plates may extend beyond 1200 mm, when seen from the front, but must not generate any aerodynamic force and must have a minimum hickness of 10 mm and a maximum width of 20 mm.
The wing should be checked with the car horizontal.
The wing supports must be defined as in drawing n°2.

[Sulland]

I take it as a given that the aero package are first being tested via 3d models, then buildt in a few different models and put through wind tullels in scale, and maybe also fullsize before homologated?

And then the new diffuser on the Fiestas in another thread, looks more like a version 0,15, looking very basic, amd something that could be thrown together in a local garage!

[OldF]

I don’t know how it’s about the R5 regulations bur this pic is from S2000 regulations. I don’t remember from where I got it, probably from some page I googled and saved it.

[TWRC]

Puskádi has received his Fabia R5 this week. He's going to debut it on Canarias, but he says that the car is free to rent for the rest of the season. He himself will do some Zone Trophy or Mitropa Cup rallies if the car will be available for those dates.
Attachment 900

Now with livery:

[Mirek]

Very nice!

[sete]

yes its nice livery
same like on Fabia S2000
http://mirousxl.rajce.idnes.cz/Rally.../#DSC_0063.jpg

[Sulland]

Right now in the R5 battle there is a two-way battle only. Ford vs Skoda.
Hopefully the PSA will get better on the loose, and get some reliability!

And we have Hyundai coming in this summer.
Maybe Mitsubishi will homologate the Mirage.

Impressive of Ford to soon reach 150 sold R5s!

[aykutbilir]

love Eurosol livery


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