Red Bull – Pull rod suspension detailed

Via Motorsport Magazin

From these images we can finally see some detail of the Red bull gearbox. Firstly the construction is carbon Fibre, which the team switched to mid way through 2009, in order to save weight over the old aluminium case.

Top wishbone location - via Motorsport Magazin

Then we can note the geometry of the wishbones, Red Bull followed high mounted wishbones since the RB5, the rear top wishbone (RTWB) being very high and near horizontal, being mounted to the ridge along to the top of the gearbox.

Differential - via Motorsport Magazin

Equally Red Bull have gone for a low differential, but the total effect is a very tall and bulky gearbox, albeit one that fits into the natural space created as the car tapers to the rear. But compared to Williams gearbox its clear to see where better airflow can be created at the tail of the car.

Pull Rod - via Motorsport Magazin

It’s rare to find pictures of the Red bull pull rod suspension. The low mounted mechanical parts normally covered by body panels and heat shielding. But here we can quite clearly see the pull rod leading down to the rocker. The pull rod is split to allow easy ride height changes by adding shims into the split and also allows the pull rod to be permanently mounted to the bearings on the rocker. When the rear wishbones are removed this lower part of the pullrod will remain with the gearbox. In turn the rocker operates the compliant elements of the rear suspension, the springs, dampers and heave elements.

Damper - Via Motorsport Magazin

The damper is clearly visible being mounted alongside the flanks of the gearbox case. The red anodized body and labels making it easy to spot. Note the rocker has a longer lever to operate the damper in comparison to the lever that the pull rod mounts to. This is to increase damper travel compared to wheel travel for greater wheel control.

rocker or Bell Crank - via Motorsport Magazin

Its not clear if the rocker works on a torsion bar t provide the rear springing, its believed Red Bull went away from torsion bars and individual wheel springs in 2009. Instead using the heave spring allied to the antiroll bar for a springless rear set up (read more at http://scarbsf1.wordpress.com/2010/12/03/spring-less-rear-suspension-a-quiet-revolution/). If a torsion bar is used it will need to run near vertically along the axis of the rocker.

Rocker to operate the Heave spring - via Motosport magazin

Not entirely visible is the heave control set up, this will consist of a Heave spring, damper andor bump rubbers, plus an inerter (not strictly for heave control but mounted in the same location). These run across the front of the gearbox, being mounted just above the clutch. We can see the splined end of the anti roll bar; the bar will have levers reaching forward to drop links that will provide the rear roll control.

Antiroll Bar location - via Motorsport Magazin

More on Pull Rods http://scarbsf1.wordpress.com/2010/10/10/red-bull-pull-rod-suspension-what-is-looks-like-how-it-benefits-aerodynamics/

Follow ScarbsF1 on Twitter

Red Bull – KERS installation detailed

via Motorsport Magazin

Having run KERS for Friday only in Melbourne, RBR will probably run the KERS system for the full weekend in Sepang. As RBR were not seen to use KERS on their qualifying laps, although they were unknown to be equipped with Renaults KERS raised rumours of a start only KERS. While a start only KERS is technically legal and has some technical advantages, it’s not thought such a system is planned for any team.
From images seen this in the team’s garage this morning we can see the KERS set up quite clearly. The actual set up is quite different to the image provided by Red bull in their Launch press pack. Which shows a far more conventional layout?

KERS control unit - Via Autosport.com

On the right hand side of the car, we can see a silver box with FIA anti-tamper seals; this is the KERS control unit (KCU). This controls the power exchange between the motor generator and the battery pack. The thick red cables carry the current in between these other devices. Running very hot from the current passing through it, the KCU will have a cool air feed from the sidepod ducting. Although not certain, the small radiator at the bottom of the other coolers is probably to cool the battery pack.

Possibly the KERS water cooling radiator - via Autosport.com

From the other side we can see the Battery pack, unusually this is mounted to the side of the gearbox. It is the rounded carbon fibre item, with the yellow warning sticker.

KERS Battery Pack - via Autosport.com

The other three KERS suppliers (Mercedes, Ferrari and Williams) all place this item beneath the fuel tank for better weight distribution and crash safety. Although McLaren did place theirs low down in the front of the sidepod in 2009. With the more rear biased mandatory weight distribution rule, this more rearwards location is not a handicap. It frees up fuel capacity and sits inside a dead area of space within the sidepod. You can see the same thick red cable emerging from the battery pack. Inside the carbon case will be an array of small lithium-Ion cells (Li-ion). These will run at high temperatures as the cells charge and discharge, as explained they will be cooled a dedicated water radiator and pump.

More on KERS: http://scarbsf1.wordpress.com/2010/10/20/kers-anatomy/

Follow ScarbsF1 on Twitter