Lotus E20 VD

[madly]

from automotorundsport.de

FrukostScores - most of your pictures are posted earlier. Please edit post and remove redundant photos.

[FrukostScones]

from automotorundsport.de

FrukostScores - most of your pictures are posted earlier. Please edit post and remove redundant photos.

done, nice name you gave me

[madly]

From AMUS:
"I hope we have the technology ready for use as soon as possible. We should again gather important data with which we can work in the summer," said Grosjean. "On tracks like Spa, Monza, but Austin and Singapore with longer straights it should help us much."

@Frukost -

[mike]

I'm still trying to make sense of it.


(Click to enlarge)

every1 should take a good look at this, the outlet is clearly the central slit on the lower profile!
since there is no flow vis on the slit of new rear wing but lots of it on the old wing. so either they paint every bit except the central slit or air is coming out to blow it off!!

[superdread]

every1 should take a good look at this, the outlet is clearly the central slit on the lower profile!
since there is no flow vis on the slit of new rear wing but lots of it on the old wing. so either they paint every bit except the central slit or air is coming out to blow it off!!

Or it is the wake of the middle pylon, as it starts at the front of said pylon and not at the slit (although picture isn't that clear).

I slightly suspect that they go to so much trouble to stall less than a third of the wing.
(Wouldn't the flow just migrate sideways, so maybe hampering overall performace but no separation?)

[bhall]

That middle pylon is razor-thin; it wouldn't cause the significant separation we've seen.

Moreover, there's absolutely no reason for that pylon to be there unless the team is venting something with it. It doesn't appear robust enough to provide support, and it's wasteful if it only serves as part of a fluidic switch for a DDRS. In the latter case, it makes much more sense to duct air through the end plates, just like Mercedes.

[mike]

every1 should take a good look at this, the outlet is clearly the central slit on the lower profile!
since there is no flow vis on the slit of new rear wing but lots of it on the old wing. so either they paint every bit except the central slit or air is coming out to blow it off!!

Or it is the wake of the middle pylon, as it starts at the front of said pylon and not at the slit (although picture isn't that clear).

I slightly suspect that they go to so much trouble to stall less than a third of the wing.
(Wouldn't the flow just migrate sideways, so maybe hampering overall performace but no separation?)

middel pylon on the mclaren 2 years ago didn't create near as much wake as the 1 on the lotus. if you look closer you'll see the slit on the top profile has flow vis, where as the bottom bit has been blown off from the air of the tube.

[Timstr]

Has it been discussed here whether this device is linked to cooling? I think it is.
Many seem to think the channel is only fed by the roll-hoop inlets, but I think there's also a link with the sidepods, extracting air from under the engine cover (if this is not the case, how is the sidepod being cooled with that channel in the way).

My theory is that this device regulates the air flow under the engine cover.
Internal aerodynamics are a large contributor to drag.
Drag is shed by reducing the internal flow when on straights. DRS activated via opening holes in the endplates.
The default is for sidepod air to exit via the central channel, but when DRS is activated, that flow is diverted to an area resulting in a smaller pressure gradient and thus less drag inducing flow under the engine cover.

[aleks_ader]

clearly! its a rear wing stall duct. I m preaty sure. Sry later i will eplain a bit furder now i have no enough time.

[amouzouris]

is it possible that since the slits on the rear wing are banned...they are using that pylon to blow the underside of the middle of the rear wing and stalling it?? it would probably be activated by a fluidic switch linked with the drs...when it is not in use the air comes out below the monkey seat...and maybe used for cooling...and when the drs is open some air is flowing through that pylon stalling the central section of the rear wing...

[PlatinumZealot]

I don't think the pylon is used at all.

Is anybody thinking what I am thinking?

because I think I know how it works. Sometimes you have to think not only out of the box, but beyond the outside of the box.

[superdread]

I revise my previous statements to:
The slit in the pylon is used to stall the middle third of the rear wing by creating a large crossflow (low internal drag of the system) effectively enlarging the wake of the pylon. This seemingly doesn't sweep the main flow to the side (as flowvis-stripes remain straight next to the wake area).

Such a system only makes sense if coupled to the DRS, as passive systems are impossible to tune to be effective over a whole race distance (at least a passive system that only reacts to speed i.e. dynamic or total pressure).

I don't think the pylon is used at all.
Is anybody thinking what I am thinking?
because I think I know how it works. Sometimes you have to think not only out of the box, but beyond the outside of the box.

Sure, it's magic.

[PlatinumZealot]

I see you aren't taking it seriously. I have an explanation coming up.

[Huntresa]

If they dont use the pylon why is it there ? You wouldnt add such a thing if it did nothing... They are prob just blowing the 15cm in the middle of the RW.

[PlatinumZealot]

The reason they use the pylon is because they moved the hydraulics from the end-plates. The pylon houses the hydraulics.
In other words the air channels are in the end plates so there is no space for the hydraulics in the end-plates.