traction control and wet weather

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rghai6
rghai6
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Joined: 29 Nov 2007, 16:07
Location: Mumbai, India

Re: traction control and wet weather

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nae wrote:
computer controlled cars
??!!?? :shock: :roll:

we have them already, there is no need for the 'variable human component' as it is

it is entirely feasible to have a car drive itself round the race track, lap after lap
like a metronome , wouldn't be a sport tho just a exercise for universities

http://www.topgear.com/content/news/stories/2398/

and thats harder as this are ment to be processed as they happen

oh and whilst i am thinking , if you follow the logic that a diff is part of traction control then so is a tyre, a wheel bearing etc, as for with out them there would be no traction
While we are on the topic of driver less racing cars, the BMW Jeremy drove (or atleast sat in) in Season 10 Episode 8 of Top Gear was driverless (and is another example apart from the DARPA rally of things to come, hopefully not soon in F1).

Description of Top Gear Season 10 Episode 8 on Wikipedia

Also was it a mere coincidence that this was the episode where Hammond drove the R27 Renault and also Hamilton featured on the show :evil:
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bizadfar
bizadfar
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Joined: 03 Jan 2007, 15:51

Re: traction control and wet weather

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jaho101 wrote:
bizadfar wrote:hmm i think you should the Indy 300 from a couple years ago.... exactly that just happened and there was majority of the field pileup on the s/f......... [-X
Did the race end 200 miles early?
listerally on the rolling start or a few laps from the start.

It was just massive fog, you couldn't see anything, worse than spa 98...

Belatti
Belatti
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Joined: 10 Jul 2007, 21:48
Location: Argentina

Re: traction control and wet weather

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Check this out!
http://www.motorauthority.com/news/safe ... #more-5404

Now that TC is gone, would be this allowed:

Mount TC wheel sensors to feed a led row in the steering wheel. Let´s say 5 leds in red is full wheelspin and 0 led is none. When driver pushes the accelerator he would "see" the feedback his ass isn´t feeling...

This is like replacing the silicon based TC-CPU with a carbon based HUMAN-CPU :wink:
"You need great passion, because everything you do with great pleasure, you do well." -Juan Manuel Fangio

"I have no idols. I admire work, dedication and competence." -Ayrton Senna

Conceptual
Conceptual
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Joined: 15 Nov 2007, 03:33

Re: traction control and wet weather

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Belatti wrote:Check this out!
http://www.motorauthority.com/news/safe ... #more-5404

Now that TC is gone, would be this allowed:

Mount TC wheel sensors to feed a led row in the steering wheel. Let´s say 5 leds in red is full wheelspin and 0 led is none. When driver pushes the accelerator he would "see" the feedback his ass isn´t feeling...

This is like replacing the silicon based TC-CPU with a carbon based HUMAN-CPU :wink:
I'm pretty sure that any warning lights are also strictly prohibited by the new regs.

Chris

Jersey Tom
Jersey Tom
166
Joined: 29 May 2006, 20:49
Location: Huntersville, NC

Re: traction control and wet weather

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No need. More LEDs would be more of a distraction.

First.. there is no such thing as "full" wheelspin. It ranges from none, to infinity. And usually infinity LED's dont fit in compact areas. Regardles of how fast the tire is spinning you're always generating thrust. There is an optimum amount of wheel slip you want for the most, but that changes tire to tire, with load, with camber, blah blah blah.

Beyond that, the driver's primary and best feedback for wheelspin is his ears and eyes. Once you feel a car out you have a good idea for how fast the engine should be rev accelerating. You can really easily hear if your rear tires are losing grip or starting to spin.

In terms of oversteer, it's all in the eyes and perceiving vehicle rotation.
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

Sulman
Sulman
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Joined: 08 Apr 2008, 10:28

Re: traction control and wet weather

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TC in this sense really is the emperor's new clothes. It'll be no problem at all for the drivers. In six months we won't even be discussing it's absence.

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Ciro Pabón
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Joined: 11 May 2005, 00:31

Re: traction control and wet weather

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Jersey Tom wrote:No need. More LEDs would be more of a distraction.
Yes, I've heard that, after Hamilton "fiasco", launching the car at Bahrain, McLaren is considering to simplify the steering wheel even more:

All new McLaren steering wheel. It will be ready in time for Cataluña. Notice the new ergonomic screen, top center: it is useful to warn the driver when he's about to crash another car from behind.
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Ciro

mx_tifoso
mx_tifoso
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Joined: 30 Nov 2006, 05:01
Location: North America

Re: traction control and wet weather

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The new McLaren steering wheel now offers a horn, which will mostly be for Hamilton's use when he attempts to 'signal' backmarkers to get out of his way, even though he is actually racing for positions against them (like the situation in Bahrain with Fisichella and Sato).
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Ciro Pabón
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Joined: 11 May 2005, 00:31

Re: traction control and wet weather

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:)

Yes, I've heard Hamilton makes signals with his hands to other drivers: the number of fingers he shows you is the number of times he has changed the engine... ;)
Ciro

modbaraban
modbaraban
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Joined: 05 Apr 2007, 17:44
Location: Kyiv, Ukraine

Re: traction control and wet weather

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If you look under the screen you'll find 3 interesting buttons (between Ron sing and Ron and Anthony sing together buttons). Those three are to be used to call a 'pull-me-out' tractor, a medical car, and a safety car. Nice! 8)

Belatti
Belatti
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Joined: 10 Jul 2007, 21:48
Location: Argentina

Re: traction control and wet weather

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Guys please grow up!

Jersey Tom: be more practical man, full wheelspin means car acceleration = 0 or less...
Appart from that there are newbie drivers, test drivers, drivers who may test differen accelerator stiffness configuration, etc.

Chris: remember that in test sessions you don´t need to comply with all the rules...
"You need great passion, because everything you do with great pleasure, you do well." -Juan Manuel Fangio

"I have no idols. I admire work, dedication and competence." -Ayrton Senna

Jersey Tom
Jersey Tom
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Joined: 29 May 2006, 20:49
Location: Huntersville, NC

Re: traction control and wet weather

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Full wheel spin means car accel = 0? Well then you will never have full wheelspin.

Spinning wheels ALWAYS produce drive thrust. Difference between slide and peak grip is small sometimes, very large other times (really wet). But that % wheel slip for peak grip changes with the track surface, the load, the conditions... you wouldn't really be able to program it ahead of time.
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

Belatti
Belatti
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Joined: 10 Jul 2007, 21:48
Location: Argentina

Re: traction control and wet weather

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First you said there is such a thing like wheelspin ranges from none, to infinity.
Now you say that Spinning wheels ALWAYS produce drive thrust, thus there is no infinity...

Believe me men, what I´m saying is very easy to achieve, you just take a range of "delta speed" and traduce that into an indicator.
"You need great passion, because everything you do with great pleasure, you do well." -Juan Manuel Fangio

"I have no idols. I admire work, dedication and competence." -Ayrton Senna

Jersey Tom
Jersey Tom
166
Joined: 29 May 2006, 20:49
Location: Huntersville, NC

Re: traction control and wet weather

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Dude..

Wheel spin is just a measure of difference in relative speed. There's no upper bound on it. Wheel can technically be spinning as fast as it wants.

A spinning wheel though still provides drive thrust.

http://code.eng.buffalo.edu/dat/sites/tire/img55.gif

That is a typical plot of longitudinal force vs wheel slip. There's a peak, but you still get thrust while spinning. Sometimes a little less than peak, sometimes a lot.

My point is, if you had LEDs set up, you would have a damn well impossible time implementing some optimum slip routine with the current setup. And on launch you don't have time to be BS'in with LEDs. You have to be focused ahead of you and on the rest of the grid.

That, and as I said, the BEST feedback the driver can get is from his eyes and ears.
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

Belatti
Belatti
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Joined: 10 Jul 2007, 21:48
Location: Argentina

Re: traction control and wet weather

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I say this:
Belatti wrote:Appart from that there are newbie drivers, test drivers, drivers who may test differen accelerator stiffness configuration, etc.
And you say this:
Jersey Tom wrote: My point is, if you had LEDs set up, you would have a damn well impossible time implementing some optimum slip routine with the current setup. And on launch you don't have time to be BS'in with LEDs. You have to be focused ahead of you and on the rest of the grid.

That, and as I said, the BEST feedback the driver can get is from his eyes and ears.
Its OK, you dont have to agree, but still think that there are drivers who suck on wet without TC, who can test accel configurations IN A PRIVATE TEST SESSION, WITHOUT CARS IN FRONT OF HIM.

You say:
Jersey Tom wrote: A spinning wheel though still provides drive thrust.
I KNOW!
Jersey Tom wrote:There's no upper bound on it.
I say: you (the engineer) set the bounds: you can discriminate the little thrust (lower bound) long slip and the upper bound (when the car is not really accelerating fast => very big difference between wheel spin * wheel radius vs car lonitudinal speed)
If you dont like LEDs you can use LCD display, you can attach a throttle position indicator ass seen on TV if you want, too, maybe some drivers could take conclusions onboard without having to wait entering pits to look at telemetry.

Some drivers prefers stiffer pedals than others, some prefers short or long pedal travel, that settings are important if you want to master 700HP INXS in the wet.

Afterall its just a suggestion :wink:
"You need great passion, because everything you do with great pleasure, you do well." -Juan Manuel Fangio

"I have no idols. I admire work, dedication and competence." -Ayrton Senna