Redbull and traction control.
Discussion
http://www.gptoday.com/details/view/454973/F1_2013...
Interesting stuff. Love the technical battles that the designers undertake.
Interesting stuff. Love the technical battles that the designers undertake.
budgie smuggler said:
Is KERS controlled by the ECU? Wondered if you could use the energy recovery mode to put some drag on the rear axle momentarily to stop the wheels spinning up.
Interesting thought. After all, if the wheels are spinning then energy is being wasted - may as well try to recover some of that energy... 
MartG said:
It looks to me that the tyre marks alternate from side to side, as if the diff is repeatedly swapping which side get the most power, possibly caused by a slightly bumpy track and the car bouncing slightly on its suspension ?
That's pretty much what I thought when I saw it. Grenoble said:
Only when the back seats are down.
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Moving on…
If I may be forgiven, I will repeat a post made in another forum, which immediately followed publication of the same interesting picture, here presented by _Batty_ (above):
cosicave said:
"Recap…
BrightLampShade said:
I wonder if you are allowed some form of traction control on the KERS?
cosicave said:
No form of Traction Control is not allowed. i.e. No system may be designed to measure wheel rotation so as to regulate the power train at any stage. This applies equally to braking.
Below is an edited comment I made in another thread in this forum. In view of Captain's reference to 'Scarbs' (which I've not yet had chance to read) it would now seem especially relevant to this thread:
Quote Originally Posted by cosicave
…
* Most likely and slightly technical: Notice that the car has not travelled in an precisely straight line. To accommodate turning, front and rear wheels have a differential which allows 'outer' wheels to travel further than 'inner' wheels. (If a car goes around in a circle, the inner wheels follow a tighter radius than the outers). Since it is the rear wheels which are driven, the rear differential forms part of the power train (transmission) and will deliver power very slightly unequally, depending upon how it is set up and depending on the tightness of the curve being taken.
* Also possible, and something which could add to the effect described above: If the track surface does not offer precisely the same resistance to each wheel at the point where the effect begins, it can set up a harmonic in the tyre which feeds back through the power train, causing a small oscillation; and can manifest itself in the way seen. …
It seems most probable to me the effect we've been discussing is a combination of the above.
It would also seem worth mentioning that just such an effect would most likely be triggered by a sudden jolt in the power train, such as might be associated with deployment of KERS. If considered beneficial, the effect might be further exploited by reducing or removing damping of KERS delivery in order to deliberately encourage such a jolt*.
*Drive trains (transmissions) are more than up to the job of coping with such jolts to the system because they must be strong enough to cope with wheels bouncing over curbs, etc., where almost instantaneous and very large differences in torque can occur – far greater than the 10%–15% increase associated with KERS.
Below is an edited comment I made in another thread in this forum. In view of Captain's reference to 'Scarbs' (which I've not yet had chance to read) it would now seem especially relevant to this thread:
Quote Originally Posted by cosicave
…
* Most likely and slightly technical: Notice that the car has not travelled in an precisely straight line. To accommodate turning, front and rear wheels have a differential which allows 'outer' wheels to travel further than 'inner' wheels. (If a car goes around in a circle, the inner wheels follow a tighter radius than the outers). Since it is the rear wheels which are driven, the rear differential forms part of the power train (transmission) and will deliver power very slightly unequally, depending upon how it is set up and depending on the tightness of the curve being taken.
* Also possible, and something which could add to the effect described above: If the track surface does not offer precisely the same resistance to each wheel at the point where the effect begins, it can set up a harmonic in the tyre which feeds back through the power train, causing a small oscillation; and can manifest itself in the way seen. …
It seems most probable to me the effect we've been discussing is a combination of the above.
It would also seem worth mentioning that just such an effect would most likely be triggered by a sudden jolt in the power train, such as might be associated with deployment of KERS. If considered beneficial, the effect might be further exploited by reducing or removing damping of KERS delivery in order to deliberately encourage such a jolt*.
*Drive trains (transmissions) are more than up to the job of coping with such jolts to the system because they must be strong enough to cope with wheels bouncing over curbs, etc., where almost instantaneous and very large differences in torque can occur – far greater than the 10%–15% increase associated with KERS.
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