Sauber C32 Ferrari

[Maxion]

More DRD pics:

[turbof1]

To be honest, comparing with everybody else, the teams who try out DRD still seem to have no clue if they have to extend the l-duct complete to the underside of the rear wing or leave a small gap. It all still looks like mid last season: guessing and more guessing.

[seinfeld]

how is their reliabilty? especially with those skinny sidepods? I wonder how they got away with that? did they go more cores, but go shorter in the width?

[JackHammer]

how is their reliabilty? especially with those skinny sidepods? I wonder how they got away with that? did they go more cores, but go shorter in the width?

They have the most testing km over the 5 days so far so it seems to be pretty good

[korzeniow]

To be honest, comparing with everybody else, the teams who try out DRD still seem to have no clue if they have to extend the l-duct complete to the underside of the rear wing or leave a small gap. It all still looks like mid last season: guessing and more guessing.

It's perfectly reasonable for me. The solution Sauber is evaluating now is easier and quicker to put on the car. You don't have to manufacture new rear wing main plate, no new beam wing.

You are carrying on your usual testing programe, quickly put the DRD solution for couple of run to check something, then you revert back to your normal programme.

It took Lotus couple of hours to remove this device, so when Kimi was testing this during Friday's FPs he ususally run the device on both sessions

[Forza]

[turbof1]

To be honest, comparing with everybody else, the teams who try out DRD still seem to have no clue if they have to extend the l-duct complete to the underside of the rear wing or leave a small gap. It all still looks like mid last season: guessing and more guessing.

It's perfectly reasonable for me. The solution Sauber is evaluating now is easier and quicker to put on the car. You don't have to manufacture new rear wing main plate, no new beam wing.

You are carrying on your usual testing programe, quickly put the DRD solution for couple of run to check something, then you revert back to your normal programme.

It took Lotus couple of hours to remove this device, so when Kimi was testing this during Friday's FPs he ususally run the device on both sessions

Mercedes went from this solution to the fully extended lotus one; surely the benefits you mentioned should also apply to them, but they choose not to. Furthermore, this is testing: now is the time to test such a difficult to remove device. During the season you cannot waste that time during free practice. I think this is more about checking which one is better. It should be reasonable to assume that they would have been able to have figured that one out with the young drivers test and during winter development. Apperently this device is much more complicated then meets the eye.

[Artur Craft]

A nice 6MB photo taken by somebody I know who visited the track(his internet nickname is Ellu):
http://www.flickr.com/photos/epstuart/8 ... 808987914/

Sauber is kind of following Red Bull on rear wing main plane's profile:
http://www.flickr.com/photos/epstuart/8 ... 808987914/

Also, this new wing appears to have the upper flap's trailing edge at height limit, this time.

[shelly]

Oh, so that's the reason of this unusual shape of main plate.

I think with this type of rear wing design they can stall a little bigger portion of rear wing than Lotus, assuming it works in the same way

I agree. It seems to me that the ears inlet on the sauber are much smaller

[R_Redding]

In Forzas first photo above (http://octanephotos.co.uk/gallery/cache ... 7d8520.jpg)

It looks like the exhaust flow is not sticking to its "coanda" channel ,but rather exiting at the side as can be seen from the scorch marks.

I wonder if the narrower sidepods are giving enough "over the top" downwash to help the effect , or wether the sidepods are producing turbulance in that area by not having as pronounced coke bottle shape as some of the other cars.

Rob

[sirexilon]

In Forzas first photo above (http://octanephotos.co.uk/gallery/cache ... 7d8520.jpg)

It looks like the exhaust flow is not sticking to its "coanda" channel ,but rather exiting at the side as can be seen from the scorch marks.

I wonder if the narrower sidepods are giving enough "over the top" downwash to help the effect , or wether the sidepods are producing turbulance in that area by not having as pronounced coke bottle shape as some of the other cars.

Rob

I think Sauber missed out in the Sidepods design. Everybody who used the coanda's last year from early on, found that they needed a flatter sidepod with a down wash over the coanda exhaust pipes, and Sauber came out with the original car launch design that Mclaren had and took out for a better version during the year.

Shame if they missed the point there. I like Peter's team even if I'm fan of another team.

[Artur Craft]

In Forzas first photo above (http://octanephotos.co.uk/gallery/cache ... 7d8520.jpg)

It looks like the exhaust flow is not sticking to its "coanda" channel ,but rather exiting at the side as can be seen from the scorch marks.

I wonder if the narrower sidepods are giving enough "over the top" downwash to help the effect , or wether the sidepods are producing turbulance in that area by not having as pronounced coke bottle shape as some of the other cars.

Rob

I agree that the exhaust gases doesn't seem to be going perfectly where Sauber would want to, as the scorch marks suggests.

However, this doesn't look to be related to downwash over it. The plume is going down, it just seems to be, laterally, not going in the desired path. The plume should go straight to seal the diffuser gaps, with the tire, and not go laterally towards the center of the car.

About the turbulence, this is exactly what Sauber design should mostly avoid unlike the kinds of Ferrari, for instance.

Turbulence in airflow occurs when the viscosity(the shear forces, which acts tangentially to it, between layers of airflow) is no longer enough to hold the airflow layers together, so separations happens.

Coanda effect is the name given to the behaviour of a fluid flow to follow, as it's path, the shape of a body's surface nearby.

If the shape of the body is not smooth, ie, if it requires the flow to have a big change in it's direction, then the force necessary to do so will exceed the force holding the fluid layers together and the separation occurs. The boundary layer will remain attached to the body's surface as this region have much less velocity(nearly 0) than the remaing part of the flow, but it will separates from the adjacent layers.

Ferraris sidepods and cokebottle require the flow to make a big change in direction while Sauber's doesn't. Ferrari have, or had, many problems with correlating it's wind tunnel data to the actual aerodynamic result on "open field"

Due to Reynold's numbers issues, you can easily have correlation problems between wind tunnel data and actual race enviroment result.

My modest guess is that the simulating tools, which Ferrari is using, are giving them some wrong perceptions in that area(calibration needed, eventhough now Ferrari is using Toyota's wind tunnel which have a very good reputation). I wouldn't be surprised at all if that big empty space(underneath the exhaust pipe exit) is having some turbulence in it. If the sidepod was tighter(especially like the C32's), it could be a marvelous packaging.....

Anyway, it's all guess work now. After Melbourne/Sepang/China we, maybe, can have a clearer picture of which design might be the best.

Sauber was saying on twitter that it was working on aerodynamic evaluation and setup work the entire 2 days. They are not even looking for laptimes, which I like. Better to have innovative aero to test with at this stage, than be already this early kind of "ready" and looking for laptimes and long stint tests as some other teams seems to be doing(Mercedes, for instance)

Additionally, so far, trackside observers, as well as Hulkenberg himself, were reporting that the Sauber car maintain it's characteristics of high downforce. That, together with the inherent low drag that the car might have, makes me quite positive about C32 untill now.

If not in the remaing 2 days of this week's test, I'm sure Sauber will show what it is capable in the final Barcelona test, next month.

[bhall]

Oh, so that's the reason of this unusual shape of main plate.

I think with this type of rear wing design they can stall a little bigger portion of rear wing than Lotus, assuming it works in the same way

I think you're in the ballpark here.

I think... (UPDATE: But, I was likely wrong. Not the first time that's happened, either.)

Teams would use the biggest, most downforce-producing rear wings allowed by the rules were it not for the huge drag penalty they bring at higher speeds. A passive DRS - still upset that the term "VD" didn't catch on, by the way - will allow teams to run larger wings at higher angles of attack than would otherwise possible, because the system "stalls" the wing at and beyond the speed in which it becomes a hindrance to performance instead of an enhancement, i.e. along straights and through high-speed turns where the diffuser alone provides sufficient downforce. I believe the new Sauber wing, coupled with passive DRS, is an example of this.

If it works, the only remaining factor limiting the size and AoA of rear wings, aside from the rules, will be their ability to quickly shed and regain downforce when "normal" DRS is deployed. Those events need to occur as quickly as possible to avoid upsetting the balance of the car. I think that's probably why this new wing resembles some of the low-downforce designs from the old formula.

[Chuckjr]

F1 test 02 - Barcelona - day 1
http://www.motorsport-magazin.com/image ... 472647.jpg

Hands down the Sauber is the dark horse this year. What a stellar car. Seriously. Well done Peter. Absolutely outstanding work.

I really hope that car throws a gigantic monkey wrench into the titanic battle we are about to experience in 2013. =D> =D>

[Huntresa]

F1 test 02 - Barcelona - day 1
http://www.motorsport-magazin.com/image ... 472647.jpg

Hands down the Sauber is the dark horse this year. What a stellar car. Seriously. Well done Peter. Absolutely outstanding work.

I really hope that car throws a gigantic monkey wrench into the titanic battle we are about to experience in 2013. =D> =D>

Maybe it could drop its monkey seat in the pathway of Vettel going thrun Eua Rogue