Red Bull RB9 Renault

[OO7]

Excepting for suspension and brakes and other systems. No mechanical motion parts are allowed on the body or chassis of the car. So it cannot be connected to the suspension.

It doesn't need to be, just needs to 'happen' to connect to the same piece of chassis that reacts the torsion bar/damper loads...

Exactly. Having said that, the question surrounding the tea tray of the RBR cars has existed since 2010. It is only this year that RB have introduced this oscillating stay, therefore they must have used other methods previously I would think.

[aral]

THe size rifling you need to get any meaningful vortex from hot turbulent open bore exhaust flow would have to be preeetty huge... I don't see it.. and then again, your exhaust has to be a CIRUCULAR cylinder. A rifled cylinder is not thin walled or circular.

Funny, I always thought that a gun barrel had a circular cross section. But rifling is just the provision of spiral grooving within a pipe. Not saying that RBR are doing this, but it is certainly possible to do this in a circular exhaust pipe. And if rifling can cause a bullet to spin, then it would certainly be able to create a vortex in the emitted gasses from an exhaust.

[miguelalvesreis]

THe size rifling you need to get any meaningful vortex from hot turbulent open bore exhaust flow would have to be preeetty huge... I don't see it.. and then again, your exhaust has to be a CIRUCULAR cylinder. A rifled cylinder is not thin walled or circular.

Funny, I always thought that a gun barrel had a circular cross section. But rifling is just the provision of spiral grooving within a pipe. Not saying that RBR are doing this, but it is certainly possible to do this in a circular exhaust pipe. And if rifling can cause a bullet to spin, then it would certainly be able to create a vortex in the emitted gasses from an exhaust.

Yes it Can! Used to be done to create a swirl effect on inlet manifolds to improve the cilinder filling

[stefan_]

Brazil 2013 - Wednesday (20.11.2013)



via AMuS

[dxpetrov]

^ Yes, it's been reported that RBR did voluntary deflection test for the front wings. Why would they do that atthe end of the season, if not maybe testing something for 2014...

[raymondu999]

[siskue2005]

^ Yes, it's been reported that RBR did voluntary deflection test for the front wings. Why would they do that atthe end of the season, if not maybe testing something for 2014...

No, all the teams can use FIA testing rigs to check their cars at the start of the weekend, before the official testing!

[siskue2005]

http://i14.photobucket.com/albums/a308/ ... 7ed7df.jpg

I am thinking, is the out wash endplate wing useful for 2014 as the wings won't be full span
Will we see in wash front wings like pre 2009 ?
Like this

[raymondu999]

Here's the proper thread: http://www.f1technical.net/forum/viewto ... =6&t=10845

[stefan_]

One of the last batches of tech pictures regarding the RB9.

Brazil 2013 - Thursday (21.11.2013)

[shelly]

AMuS The Secret of the Y250 vortex

Interesting picture - first time vortices get some coverage. But iirc what we saw is not the y250 vortex, it is the flap vortex. The y 250 is the one that runs low close to the ground towards the t-tray.

The Y250 vortex is created at the tip of the wing, designed to drive airflow along the axis 250mm from the centerline.

All the flows along this axis either drive under the floor to the diffuser or via the undercut of the sidepod.

The y250 vortex and the tip wing vortex are two different vortices:

front wing vortices - endplate vortices number 1,2,3; y250 vortex number 5 let us start from them.

hera we see that at the ned of 2011 rbr used an arched shape also at the y250 change of section, to house the vortex formed by the load difference between the central mandated section and the outer part of the front wing

What we saw in texas was the flap tip vortex - also the Piola drawing is accurate in representing it starting from the flap tip.

[PlatinumZealot]

THe size rifling you need to get any meaningful vortex from hot turbulent open bore exhaust flow would have to be preeetty huge... I don't see it.. and then again, your exhaust has to be a CIRUCULAR cylinder. A rifled cylinder is not thin walled or circular.

Funny, I always thought that a gun barrel had a circular cross section. But rifling is just the provision of spiral grooving within a pipe. Not saying that RBR are doing this, but it is certainly possible to do this in a circular exhaust pipe. And if rifling can cause a bullet to spin, then it would certainly be able to create a vortex in the emitted gasses from an exhaust.

This is what is meant by circular.



As per the bullet in a gun.. A bullet obstructs the path of gas through the barrel. and the gas is forced to escape around the bullet through the riffling. The swirl of gas plus whatever frictional effects between the rifling and the bullet causes the bullet to swirl. In an open three inch exhaust pipe this just aint gonna happen on any significant scale without really large fins for rifling no matter how you wish for it.

[aral]

As per the bullet in a gun.. A bullet obstructs the path of gas through the barrel. and the gas is forced to escape around the bullet through the riffling. The swirl of gas plus whatever frictional effects between the rifling and the bullet causes the bullet to swirl. In an open three inch exhaust pipe this just aint gonna happen on any significant scale without really large fins for rifling no matter how you wish for it.

Oh dear! So gas flow is not altered by surface shaping? Well then, all those who have developed the coanda are wrong? Most interesting.

[321apex]

Brake question to All.
Looking at RB pictures of wheel corners, I have a feeling that they are utilizing double hydraulic lines to each brake caliper to facilitate easier and more complete hydraulic system bleeding. The second line would be going back to the reservoir or brake master cylinder. This may be a necessary feature since they position their brake calipers in a horizontal position, which would make that routing more challenging in a classic sense.

Can anyone confirm this please. Thanks.

[DaveW]

... A bullet obstructs the path of gas through the barrel. and the gas is forced to escape around the bullet through the riffling. The swirl of gas plus whatever frictional effects between the rifling and the bullet causes the bullet to swirl.

I hesitate the disagree (because I really don't know). But I can't help thinking that Joseph Whitworth might have a different (less aero-biased) explanation.