Renault R30

[marcush.]

they added the f-duct and it worked...which team could claim the same?
for sure Renault have found back to old quality and this shows that it was neither Briatore ,Symmonds nor Alonso were necessary incrdient to this soup.
in fact they may have been detrimental to the rise it seems.

[WiktorF]

Renault are doing so well, so some say Renault wants to buy back the team from Genii Capital...

What do you think about Renault's F-Duct in some next races?
We know that it will not be very usefull at Monza, but I've heard (I don't know acculy where ) that they won't use it in Singapore too...

[Neno]

Renault are doing so well, so some say Renault wants to buy back the team from Genii Capital...

What do you think about Renault's F-Duct in some next races?
We know that it will not be very usefull at Monza, but I've heard (I don't know acculy where ) that they won't use it in Singapore too...

Singapore is like Monaco high downforce track. there is unnecessary f-duct system. system will probably be used on all other tracks: Suzuka, Interlagos, Abu Dhabi, Korea

[marcush.]

montecarlo was deemed similar to hungary ,which was not true ..and montecarlo compares not really to anything else in F1 ,my opinion....

[Neno]

montecarlo was deemed similar to hungary ,which was not true ..and montecarlo compares not really to anything else in F1 ,my opinion....

monte carlo is very similar like singapore. very, very, high-downforce track, with many slow corners. in hungary you have many corner but not that slow, only two-four corners with shicane. sory for my bad english!

[Morteza]

Renault has done pretty well this season and their development pace has been incredible. They have easily surpassed Mercedes, and they are fighting with the top teams at the moment. Their F-duct system worked really well in Spa.

[747heavy]

detail on the rear wing endplate


larger version in HD of the photo with details here:
http://img266.imageshack.us/img266/8017/96694242.jpg

another interesting feature is the carbon strut which connect the engine with the monocoque. This will make the whole car more stiff in torsion, and is taking stress/load off the engine, which will be benefical for less internal friction loses.
So this engine is "just" semi-stressed.

[mx_tifoso]

Someone already posted it in the previous page.

[747heavy]

sorry Mx_Tifosi
please feel free to delete the post
the link will give access to a higher resolution version of the photo

[mx_tifoso]

The strut had already been noticed before, but it was on the other side. So I find it odd that there is one on each side, or interchangeable for clockwise and anticlockwise? Or perhaps it's just that I haven't paid enough attention.

What is this ? A normal splindle/arch ?

[747heavy]

I think they will have two (one on each side) to connect the pickup point of the top wishbone direct with the chassis, so that you don´t feed all the suspension loads throught the engine.
Makes life for the engine easier.

O.K. this is not a F1 car, but similar concept.
You see that the torsional stiffness decreases at the chassis/engine interface.
The struts will help to maintain a higher torsional stiffness in this area,
and also takes some bending load off the engine. - IMHO

You see these "struts" or subframes in some other cars (series), where the engines
are not designed to be fully stressed. Mainly with race engines which are based on production blocks/engines. Sure, this is not the case here.
But Renault uses this Struts in there F1 cars before, so maybe the engine is a bit sensible in regards of extra loading.

[PlatinumZealot]

So why do you believe it is mainly for torsional loading? I am interested as to why.

Torsion acts in a plane that is perpendicular to the length of the car. those bars are arranged to take load in the longitudinal direction, notice the fairly narrow angle of attachment. So I think those two bars are not for torsion. I think there for simple bending of the engine against and away from the chassis caused down-force acting over the length of the car. Think of standing on a skateboard.

[ringo]

Yep bending loads. Torsion is about the longitudinal axis.
That bar will only resist torsion effectively if it were in a diagonal or along a lateral axis.

[marcush.]

it very much looks like there is triangulation between these bars and the chassis
so there is surely a contribution to torsional rigidity as well? the old renault layout i think had those two bars almost paralell to the car centreline...so I agree these were just bending loads .

[747heavy]

can´t remember that I said "mainly", but
is a part with a larger cross-section for a given length more torsional stiff, then a part with a smaller cross-section for a given length?

The bars/struts increase the effective cross section - IMO
But I agree and have mentioned, that they help in bending as well.
And why do you test race car chassis for torsional stiffness, when bending is the most important mode - according to your downforce statement?