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[Hammer278]

Well I graduated with an engineering degree but have the excuse of never actually putting it into practice.

But yeah, this Renault exhaust is the first innovation which has me scratching my head.

[texasmr2]

I hear ya and all past practical designs, interpretations of exhuast flow have everyone scratching their heads but it sure is damn innovative, good too see that thinking once again.

[Jensonb]

Side note, my last post was supposed to say "along the floor". I know you all probably figured, but it stuck out at me on a re-read. This is what I get for typing too quickly

[scotty]

My guess is that they are being used to manipulate air pressures under the car to ultimately improve the effectiveness of the diffuser.

[What's Burning?]

Well I graduated with an engineering degree but have the excuse of never actually putting it into practice.

But yeah, this Renault exhaust is the first innovation which has me scratching my head.

I have an art degree and I work in engineering so don't feel too bad, I'm in your reverse situation. In Renault's defense though, I will say that at times non conventional thinking is just wrong, I've learned that because something has always been done a certain way, it doesn't mean it's the best way or that there isn't another better more efficient method.

Renault didn't do this willy-nilly, they put a lot of brain/computing power and weight the pros and cons for some time before deciding to pull the trigger on something like this.

[What's Burning?]

My guess is that they are being used to manipulate air pressures under the car to ultimately improve the effectiveness of the diffuser.

Exactly, and they calculated that their way got them X more downforce which would translate into X time faster around a circuit and decidid to put it into practice. Good for them if it work I say. it may not be the big bang for the buck the F-Duct was last year but I can't complain about them trying a unique solution.

[racechick]

Maybe Mclaren have one of these too. Well we'll find out tomorrow.

[bigpat]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

I understand sending high speed, low pressure air under the car, to help feed the diffuser a greater mass of air. Sending the same type of gases over the floor/diffuser, will only negate the effect, as on top, you want high pressure, slower moving air, to obtain the pressure differential.....

I understand last year, gases were fed over the diffuser with a large gurney flap at the trailing edge. This quite logically, helps the diffuser's scavenging effect.

Conversely, I can see how the RB 7 has exhaust fed through the outer, and upper part of the diffuser, again using the high energy air to help scavenging as well.

My point is that either you feed the exhaust, over or under, but not both.........

I think too much it being made of how long exhausts will hurt engine performance. If you remember in the late 90's prior to the Ferrari top exit exhaust, everyone ran them all the way back, to feed out over the top of the diffuser roof. The R31's exhaust is no worse than that.

Secondly, the length of the collector pipe has much less effect on engine performance than the diameter and length of the exhaust primaries.

Thirdly, if does have an effect, it will help the torque, and driveability, which is only a good thing. The introduction of KERS will take some priority off top end power in my opinion.....

[darwin dali]

My guess is that they are being used to manipulate air pressures under the car to ultimately improve the effectiveness of the diffuser.

Exactly, and they calculated that their way got them X more downforce which would translate into X time faster around a circuit and decidid to put it into practice. Good for them if it work I say. it may not be the big bang for the buck the F-Duct was last year but I can't complain about them trying a unique solution.

Fixed it for ya:

...got them X more downforce which would translate into Y time faster...

[What's Burning?]

My guess is that they are being used to manipulate air pressures under the car to ultimately improve the effectiveness of the diffuser.

Exactly, and they calculated that their way got them X more downforce which would translate into X time faster around a circuit and decidid to put it into practice. Good for them if it work I say. it may not be the big bang for the buck the F-Duct was last year but I can't complain about them trying a unique solution.

Fixed it for ya:

...got them X more downforce which would translate into Y time faster...

Where were you when I was struggling to get a C in algebra 2?

[What's Burning?]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

....

......

........

.......... there's a FART joke in there somewhere and I'm struggling to get it out.

[darwin dali]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

....

......

........

.......... there's a FART joke in there somewhere and I'm struggling to get it out.

Push harder

[spankyham]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

....

......

........

.......... there's a FART joke in there somewhere and I'm struggling to get it out.

Push harder

Watch out for follow-through

[bigpat]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

....

......

........

.......... there's a FART joke in there somewhere and I'm struggling to get it out.

Push harder

Watch out for follow-through

Or in F1 terms, overrun......

[Jensonb]

Having had a think about this, I don't agree with the illustrated theory of the gases travelling both over and under the floor.

....

......

........

.......... there's a FART joke in there somewhere and I'm struggling to get it out.

Push harder

That's what she said.