Red Bull RB13 TAG Heuer

[F1NAC]

I dont know how would you channel air becase of front wheels wake to underside of floor. you are feeding floor from the front side.

http://oi58.tinypic.com/10nexhl.jpg

It makes sense to "seal" sides of the floor from dirty air produced by tyres

Venturi vortices in diffuser tend to pull a lot of air towards them. What you see bellow is on car with a very short wheelbase where front tyre wake is event more influential, and I would think that these vortices are a lot stronger in a 2017 F1 diffuser.
This is Cp +1 to -2, the usual span in F1 as well.

http://i63.tinypic.com/flfpro.jpg

Though, with new tyres, rears especially, as wide as they are I'm second guessing myself now...

Watching bhall's photo it looks like vortex is sealing floor and then just in front of rear tyre venturi vortex pulls that into diffuser area.

Ps greetings from neighbourhood (just saw that youre from Serbia )

[Vanja #66]

Pozdrav i od mene, komšija.

That seems to me like wrong direction of vortex circulation to be sucked inside diffuser and under the floor. Pure sealing makes more sense...

[bhall II]

Would you really want to seal the floor with a vortex or a skirt? It's one thing to seal a Venturi channels, another to seal the diffuser, but to seal the floor... Makes no sense to me. It is my understanding that a certain amount of air going into those diffuser vortices comes from outside the floor, or am I wrong?

The diffuser's edge vortices are fed by air flow over the floor. "Sealing" the floor prevents the diffuser from being overloaded.

EDIT: I'll come back to this, because I don't think the idea I've expressed--and not just here--is what I intended to express.

[FrukostScones]

I dont know how would you channel air becase of front wheels wake to underside of floor. you are feeding floor from the front side.

http://oi58.tinypic.com/10nexhl.jpg

It makes sense to "seal" sides of the floor from dirty air produced by tyres

Venturi vortices in diffuser tend to pull a lot of air towards them. What you see bellow is on car with a very short wheelbase where front tyre wake is event more influential, and I would think that these vortices are a lot stronger in a 2017 F1 diffuser.
This is Cp +1 to -2, the usual span in F1 as well.

http://i63.tinypic.com/flfpro.jpg

Though, with new tyres, rears especially, as wide as they are I'm second guessing myself now...

Watching bhall's photo it looks like vortex is sealing floor and then just in front of rear tyre venturi vortex pulls that into diffuser area.

Ps greetings from neighbourhood (just saw that youre from Serbia )

the vortex is maybe designed to move into the gap between the tyre and diffuser end, to seal it till the end?
It looks to me it s hitting the wheel and then trundles on inside...

fairly large gaps there this year.

[SR71]

I'm really in love with the RB13 side pods and the fact that they have almost zero horizontal surfaces. I believe this is to reduce lift in this area and bring as much air around the sides to the diffuser as possible.

I created the below image with some very rough section lines to show how there are almost zero horizontal surfaces on the sidepods, even at the very leading edge the surface is falling away.



This is in stark contrast to the main target: Mercedes. Mercedes side pod top surface is actually quite large and very horizontal.





I also believe RB's sidepods to be extremely small, perhaps smallest in the field. The analysis in the image below please consider the following things:

-The angles are not exactly the same, the Mercedes is taken more head on and therefore the car is fore-shortened much more (pink dotted lines)
-The mercedes image was taken slightly higher so shows more of the side pod top surface.

Given the above two considerations, it's amazing that the mercedes sidepod has so much surface showing. Theoretically given the angle differences between photos, if both cars had equal sidepod lenghts, Mercedes would be less visible.



The angular nature of the RB sidepod is very evident as well.

[tmoneyr007]

First time I've noticed the "channels" in the floor running along the side pods. Only on the left side? Angle, lighting, dirt?

"IF" They happened to run a floor with a difference on one side, would be a perfect opportunity to run floviz on the diffuser.

[shady]

Hmm

https://youtu.be/iuVRECsDbl4?t=261 - tag isnt working

Watch the RB13 at 4:22 the cars rake is flat, the drs is open. as the car passes in front of us the DRS closes (this generally is automatic as soon as the brake pedal is depressed) we have entered the braking phase, there is a moment before the car bounces back up to its raked position. There is a delay between the DRS closing (brake being applied, and should initiate pitch) and the car 'leveling off' slow the video to .25x

[jagunx51]

Venturi vortices in diffuser tend to pull a lot of air towards them. What you see bellow is on car with a very short wheelbase where front tyre wake is event more influential, and I would think that these vortices are a lot stronger in a 2017 F1 diffuser.
This is Cp +1 to -2, the usual span in F1 as well.

http://i63.tinypic.com/flfpro.jpg

Though, with new tyres, rears especially, as wide as they are I'm second guessing myself now...

Watching bhall's photo it looks like vortex is sealing floor and then just in front of rear tyre venturi vortex pulls that into diffuser area.

Ps greetings from neighbourhood (just saw that youre from Serbia )

the vortex is maybe designed to move into the gap between the tyre and diffuser end, to seal it till the end?
It looks to me it s hitting the wheel and then trundles on inside...

fairly large gaps there this year.
http://www.f1fanatic.co.uk/wp-content/u ... 41x529.jpg
https://imgr1.auto-motor-und-sport.de/D ... 010226.jpg

Those tires !!! ............. looks like Dr. Jekyll of F1 cars

So huge.... [-o<

[jagunx51]

Hmm

https://youtu.be/iuVRECsDbl4?t=261 - tag isnt working

Watch the RB13 at 4:22 the cars rake is flat, the drs is open. as the car passes in front of us the DRS closes (this generally is automatic as soon as the brake pedal is depressed) we have entered the braking phase, there is a moment before the car bounces back up to its raked position. There is a delay between the DRS closing (brake being applied, and should initiate pitch) and the car 'leveling off' slow the video to .25x

1:33

EPIC =D> =D> =D>

[FW17]

There seems to be a difference in how the 2 teams are dealing with sealing of the floor

Red Bull sealing is along the floor edge
Ferrari trying to get it around the rear tyre

[Blackout]

[Vanja #66]

http://i.imgur.com/DfEgw7a.jpg
http://i.imgur.com/9ZjDdIs.jpg

The diffuser's edge vortices are fed by air flow over the floor. "Sealing" the floor prevents the diffuser from being overloaded.
EDIT: I'll come back to this, because I don't think the idea I've expressed--and not just here--is what I intended to express.

And the world makes sense again, thanks for that clarification.

the vortex is maybe designed to move into the gap between the tyre and diffuser end, to seal it till the end?
It looks to me it s hitting the wheel and then trundles on inside...

fairly large gaps there this year.

Large gaps indeed and I think those fences in front and on the inside of rear tyres are even more important this year...

This is in stark contrast to the main target: Mercedes. Mercedes side pod top surface is actually quite large and very horizontal.
...

The angular nature of the RB sidepod is very evident as well.

To be honest, it baffled me as well, Mercedes having sidepods that flat and generally large. Probably the overall positive effect of that downwash going to the coke bottle zone trumps the negatives. Still, RB13 is elegantly simple in this area...

First time I've noticed the "channels" in the floor running along the side pods. Only on the left side? Angle, lighting, dirt?

"IF" They happened to run a floor with a difference on one side, would be a perfect opportunity to run floviz on the diffuser.

http://www.f1fanatic.co.uk/wp-content/u ... 41x529.jpg

I think those are simply sandwich honeycombs in multiple thicknesses, visible on one side only due to light and shadows. You can make such a large flat panel rigid enough only by thickening it (i.e. increasing the area moment of inertia) if you don't want to add struts and brackets.

[Vanja #66]

http://img.f1today.eu/x/full/photos/58b ... 8788e7.jpg
http://img.f1today.eu/x/full/photos/58b ... 718355.jpg

That's quite a lot of twist on the front wishbone's pickup points. Compare to RB12:



That's Newey's work no doubt. Front wing's longer and less aggressive Y250 zone makes sense now, they are trying to get as much flow as possible under the sidepod intakes and perhaps a bit of it to the floor leading edge. To do so, they are using lower part of the airflow, maybe even a part of the one coming under the front wing, and are twisting wishbones and pickup points to bend it where they want to. Just like what Ferrari seems to be doing with chassis winglets and high sidepod intakes. Ferrari solution is using cleaner airflow with more energy, though...

[Mr.G]

There seems to be a difference in how the 2 teams are dealing with sealing of the floor

Red Bull sealing is along the floor edge
Ferrari trying to get it around the rear tyre

http://www.newsf1.it/wp-content/uploads ... ML2458.jpg
https://imgr1.auto-motor-und-sport.de/D ... 010225.jpg

Isn't the Ferrari solution better? It creates even bigger area for diffuser. Or am I wrong?

[FW17]

There seems to be a difference in how the 2 teams are dealing with sealing of the floor

Red Bull sealing is along the floor edge
Ferrari trying to get it around the rear tyre

http://www.newsf1.it/wp-content/uploads ... ML2458.jpg
https://imgr1.auto-motor-und-sport.de/D ... 010225.jpg

Isn't the Ferrari solution better? It creates even bigger area for diffuser. Or am I wrong?

Maybe better but you are moving more air, which could mean more drag.

RedBull has done this car based on data they had on the Renault ending of 2016, so they have been very careful to reduce drag.

As an when Renault up their horse power RedBull have more to gain as they would have the required downforce but with lot lesser drag