Windtunnel testing

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http://uk.youtube.com/watch?v=hT0NgBbJPck

[AMG Merc]

So, does this prove that the Noble is a brick then? The only place my untrained eye saw a good pattern was from the centre of the rear wing (not surprising really).

[ThatPhilBrettGuy]

AMG Merc said:

So, does this prove that the Noble is a brick then? The only place my untrained eye saw a good pattern was from the centre of the rear wing (not surprising really).

Down force and balance is good with all those mods (and more not shown). Guess what the CD is though! For reference the Nissan GT-R is 0.27 and a Pork GT3 is 0.29

[m12_nathan]

That isn't an M400?

How is Paul - does he still post on here?

[ThatPhilBrettGuy]

m12_nathan said:

That isn't an M400?

How is Paul - does he still post on here?

Paul pops in every so often. It is an M400, but not Paul's car. Number plates and stickers added for the magazine story.

[m12_nathan]

Aha - the number plate confused me

As for Cd - I'm guessing 0.38

[Adrian W]

Keep on going

[F.C.]

0.45?
F.C.

[ThatPhilBrettGuy]

F.C. said:

0.45?
F.C.

Bit more

[DanH]

So do these mods stop air from the rear splitter being sucked backwards into the engine bay? Kinda looked like that to me, but I have no idea how to interpret smoke signals. Does the vid actually show anything with the smoke?

(Oakley Design has one for its carbon parts (made by reverie!) and wasn't sure what it showed either!)

[Adrian W]

DanH said:

So do these mods stop air from the rear splitter being sucked backwards into the engine bay? Kinda looked like that to me, but I have no idea how to interpret smoke signals. Does the vid actually show anything with the smoke?

(Oakley Design has one for its carbon parts (made by reverie!) and wasn't sure what it showed either!)

Oakley's GT3 got down to 0.31 but had no downforce, yes the splitter works, but for some reason the two outer elements do very little, the Mira blokes said this is normal.

[elenitro]

ThatPhilBrettGuy said:

F.C. said:

0.45?
F.C.

Bit more

0.48?

Wasn't there a race engineering article about this?

Leon

[ThatPhilBrettGuy]

elenitro said:

0.48?

Yup. About the same as a large van.

elenitro said:

Wasn't there a race engineering article about this?

Yup. They were part of the testing day.

[Adrian W]

From memory, we went from no downforce at the front and sorted the aero balance from all at the back to something like 44 56 and a big increase all over.

[NickyTwoHats]

ThatPhilBrettGuy said:

elenitro said:

0.48?

Yup. About the same as a large van.

elenitro said:

Wasn't there a race engineering article about this?

Yup. They were part of the testing day.

But what's the frontal area? From memory CD x Frontal area = drag, so if my memory's working (doubtful) then a small frontal area will offset a high CD.

N2H

[ThatPhilBrettGuy]

NickyTwoHats said:

But what's the frontal area? From memory CD x Frontal area = drag, so if my memory's working (doubtful) then a small frontal area will offset a high CD.

N2H

I'll see if the CdA figure is around.

[Adrian W]

1.87M2

[Gadgeroonie]

is 1.87 good ?

[ThatPhilBrettGuy]

Gadgeroonie said:

is 1.87 good ?

No.

[Gadgeroonie]

does anyone know how it compares to say an Ultima ?