Mclaren Mercedes MP4-25

[f1rules]

just fueling to the stalling rumors, here is what Rubens said after the test

"I saw a super fast McLaren in a straight, about 10km/h (note: faster than he was). Ferrari not as much, but also very fast out of the box. Sauber has impressed, but we have no way of knowing what they are running - if you need a sponsor it's easier to find one by running light, but I'm not making any assumptions. Renault on the other hand will probably have had the same problems we had."

[ringo]

This still looks like a DDD, with the rear tie rods going across the opening.
The angle of the top level seems pretty steep.

[ringo]

Strange slit in the sidepod

Anyone notice how tight the foam thing (can't rember the name) is around the drivers head?
Should this be a standardized thickness, or it only has a minimum thickness?
corking up the cock pit is a good way of keep air out.

How tall is Gary Paffet anyway?

[Pup]

just fueling to the stalling rumors, here is what Rubens said after the test

"I saw a super fast McLaren in a straight, about 10km/h (note: faster than he was). Ferrari not as much, but also very fast out of the box. Sauber has impressed, but we have no way of knowing what they are running - if you need a sponsor it's easier to find one by running light, but I'm not making any assumptions. Renault on the other hand will probably have had the same problems we had."

Maybe some of gooney's detractors will have to eat crow before it's all over.

[conni]

Looks like you've been giving it quite a bit of thought. =D> =D>

One question: is it a good thing having a larger airbox to create directed flow?[/quote]
Ive NO idea it was only a guess and is probably wrong but it may work but ive no idea how much air the engine uses or how much flows around past and through the car
but im sure someone on here would know or could work it out

conni

[mx_tifoso]

Did Barrichello see an official speed reading or was it just a perception? That makes or breaks his statement.

And there are so many variables that I don't find what he said relevant. Maybe the other "slow" cars were doing cool down laps or something similar while the McLaren was on a hot lap schedule.

[ringo]

There are separate air holes in and around the roll hoop. Hole for the airbox, a separation above that for??, then 2 holes bellow it for cooling.

[myurr]

I don't think that diffusor is anything special. It has not vertical boundary on the upper deck so the point is really to smooth airflow exiting the engine cover and possibly side pods. A kind of fancy gurney flap more than anything else.

we'll see where the mac is early march and if anyone else has copied it.

If you look carefully there are vertical fences at either end - they're just curved and slightly undercut. Think of it as an extreme interpretation of the Ferrari third deck, except in this case it is only a two deck diffuser. There are further vertical fins through the middle, and as ringo said the tie rods cross through the diffuser with the rest of the suspension further forward.

Whether or not it works, it is surely monstrous in size!

[Pup]

Did Barrichello see an official speed reading or was it just a perception? That makes or breaks his statement.

Sounded a bit like a UFO sighting to me.

[Pup]

There are separate air holes in and around the roll hoop. Hole for the airbox, a separation above that for??, then 2 holes bellow it for cooling.

If the whole "blown flap" theory is true, then I suspect that the topmost section is ducting through the fin into the wing, where it's then released via what looks like a small slit that runs across the back, near the leading edge.

Some of us were talking about this via PM's - my thinking now is that the flow of air would be continuous, without any sort of control other than the speed of the car. At lower speeds, the airflow acts just like a blown flap would on a plane, allowing a steeper angle for the wing without the boundary layer separating and stalling. But then at high speeds, the effect of the blown flap is overcome and the wing then stalls. The point at which that happens could be adjusted then for each circuit as needed by limiting the maximum flow of air to the wing slots.

Of course, I don't know if physics really works that way, but it sounds good to me.

Checkered sent me these links, which are pretty interesting...

http://en.wikipedia.org/wiki/Blown_flap
http://www.tu-braunschweig.de/Medien-DB ... ngsten.pdf

...and this one, which made me laugh since I'd never have put the two together...

http://www.dyson.com/fans/

[De Jokke]

http://www.autosport.com/news/report.php/id/81193

interview with paffet

dunno what to think...

[ringo]

There are separate air holes in and around the roll hoop. Hole for the airbox, a separation above that for??, then 2 holes bellow it for cooling.

If the whole "blown flap" theory is true, then I suspect that the topmost section is ducting through the fin into the wing, where it's then released via what looks like a small slit that runs across the back, near the leading edge.

Some of us were talking about this via PM's - my thinking now is that the flow of air would be continuous, without any sort of control other than the speed of the car. At lower speeds, the airflow acts just like a blown flap would on a plane, allowing a steeper angle for the wing without the boundary layer separating and stalling. But then at high speeds, the effect of the blown flap is overcome and the wing then stalls. The point at which that happens could be adjusted then for each circuit as needed by limiting the maximum flow of air to the wing slots.

Of course, I don't know if physics really works that way, but it sounds good to me.

Checkered sent me these links, which are pretty interesting...

http://en.wikipedia.org/wiki/Blown_flap
http://www.tu-braunschweig.de/Medien-DB ... ngsten.pdf

...and this one, which made me laugh since I'd never have put the two together...

http://www.dyson.com/fans/

Yeah, the flap blowing concept was what i was alluding to, just never had a name for it. My idea was working in the opposite way though. To reduce lift and drag without stalling the wing. Only desirable on the straights.
The flap blowing requires a jet, i doubt these cars can provide that kind of force to the injected air.
Flap blowing to increase downforce though was around in the old days on race cars, i can't remember how long ago, neither do i remember the power requirement to pump the air behind the wing.

[Tbox]

http://www.autosport.com/news/report.php/id/81193

interview with paffet

dunno what to think...

It's difficult?

[horse]

Q. So no green paint tomorrow?

GP: You never know.

There was green paint today, the little liar!

[Pup]

The flap blowing requires a jet, i doubt these cars can provide that kind of force to the injected air.
Flap blowing to increase downforce though was around in the old days on race cars, i can't remember how long ago, neither do i remember the power requirement to pump the air behind the wing.

I bet you could get a pretty strong jet of air coming out of that slot. You've piqued my interest on the older cars. Any idea where you've heard that?

I suppose this isn't much different from what the split wing elements are doing anyway - the lower element sending air to the rear of the upper one.