Technical Analysis: WRC Cars 2017

[mozesii]

you must be new here kid...

You must be the dinosaur

[N.O.T]

You must be the dinosaur

i have built this place kid.

[mozesii]

i have built this place kid.

My point exactly dinosaur

[KKS]

What Nicolas are do at 26:00 here https://www.facebook.com/vincent.ver...0549309801771/ ?
Some stickers to radiator? But why?

[dimviii]

What Nicolas are do at 26:00 here https://www.facebook.com/vincent.ver...0549309801771/ ?
Some stickers to radiator? But why?

at very cold climate are blocking some air to the coolers(air/water) to help the engine work at normal temps.
All wrc cars at Sweden have some kind of these.

[skarderud]

Just a thought.
With the extended Aero, and in this specific, the flat floor and diffusor, will work better the closer to the ground it is. Are off's like meekes today be a result of gambling with rideheight? It was some real weird car-behaveior in the last corners egen you see the inboard from the insident.

Sent fra min XP7700 via Tapatalk

[stefanvv]

Just a thought.
With the extended Aero, and in this specific, the flat floor and diffusor, will work better the closer to the ground it is. Are off's like meekes today be a result of gambling with rideheight? It was some real weird car-behaveior in the last corners egen you see the inboard from the insident.

I think he was just too fast there, the car didn't turn. But in theory, yes, the low pressure area beneath the car is weaker with bigger ride height.

[KKS]

at very cold climate are blocking some air to the coolers(air/water) to help the engine work at normal temps.
All wrc cars at Sweden have some kind of these.

They do this after/before each stage? For road/stage mode?

[dimviii]

I ve seen it at stage mode.Probably is up to what temperatures they have.

[NickRally]

Here is my first attempt at creating an aero analysis of the 2017 WRC cars. There is always a risk of making oneself look like a fool when doing this, but I’ll give it a go . I will start with the Fiesta and will expand with all the other cars as and when I have the time, but I can already see some very interesting features on the Yaris. I am also no expert on the regulations and although I have downloaded them, the nature in which they are presented is very different to the world of ground up designed racing cars where I come from, which makes the WRC tech regs a real challenge for me to follow.

1. Ford Fiesta

Fiesta diffuser with notes 1.JPG

The diffuser on the Fiesta appears to be the shallowest (1) of them all, this is not necessarily a disadvantage in terms of aero, but it is quite modest in comparison to the rest of the field. The transition area into the diffuser (2) is quite narrow as dictated by the suspension arm protectors (3), which in turn, at their trailing edge, do not form a continuous transition into the diffuser, though they probably provide a nice skirted area around the central floor into the diffuser transition, which would help with accelerating the air flow and reducing the air pressure further there. Nevertheless, integrating the trailing edges nicely into the diffuser surface (notwithstanding the technical challenges involved in this) may deliver an added benefit (something that appears to be done on the Yaris on some of the images). The diffuser streaks appear to extend below the surface of the flat floor in front of the diffuser, but I suspect this is optical illusion and like in many other forms of mototsport they are not allowed to do so, but once again a proper read of the tech regs should provide an answer to this question.
Moving towards the front of the car, there appears to be a non-flat area, which I don’t know if it is because of the tech regs/homologation or it is done for creating an aero benefit. The image is not clear enough for me to see what happens there, but I can see similar features on the Yaris, though on some of the images of the Toyota from testing, I can also clearly see additional diffusers in front of the rear wheels, though more on this later.

Regards,
Nick