Cornering stifness

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Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Cornering stifness

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What does cornering stifness mean?

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Sebp
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Joined: 09 Mar 2010, 22:52
Location: Surrounded

Re: Cornering stifness

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Maybe this helps:

http://www.giyf.com/ :mrgreen:

http://en.wikipedia.org/wiki/Suspension_%28vehicle%29

http://en.wikipedia.org/wiki/Anti-roll

Basically, if your inner wheels have sufficient (however you want to define that) contact with the road surface, your cornering stiffness is good. The better your contact, the more lateral acceleration your car can cope with, the higher your maximum cornering speed (if the surface has no bumps :)).
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Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Sebp wrote:Maybe this helps:

http://www.giyf.com/ :mrgreen:

http://en.wikipedia.org/wiki/Suspension_%28vehicle%29

http://en.wikipedia.org/wiki/Anti-roll

Basically, if your inner wheels have sufficient (however you want to define that) contact with the road surface, your cornering stiffness is good. The better your contact, the more lateral acceleration your car can cope with, the higher your maximum cornering speed (if the surface has no bumps :)).
Thank you for the giyf :mrgreen: but I dont see that any of those links have anything to do with the iformation you have given me :D
Do you have a valid source?

Lycoming
Lycoming
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Joined: 25 Aug 2011, 22:58

Re: Cornering stifness

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That's not the definition I learned :wtf:

For small slip angles, the tire's lateral force increases linearly with slip angle. The slope of this relationship in the linear region is the cornering stiffness; steeper slope = higher cornering stiffness.

Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Lycoming wrote:That's not the definition I learned :wtf:

For small slip angles, the tire's lateral force increases linearly with slip angle. The slope of this relationship in the linear region is the cornering stiffness; steeper slope = higher cornering stiffness.
How about the non-linear region?

Lycoming
Lycoming
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Joined: 25 Aug 2011, 22:58

Re: Cornering stifness

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Then, it's non-linear and can't be described by a single value for slope? you can still determine a cornering stiffness value by taking slope out of the data between data points, but it's not a very useful thing to do outside of the linear region, wherein it has certain performance implications.

Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Lycoming wrote:Then, it's non-linear and can't be described by a single value for slope? you can still determine a cornering stiffness value by taking slope out of the data between data points, but it's not a very useful thing to do outside of the linear region, wherein it has certain performance implications.
If the non-linear region means the tire cant produce more lateral force due to too much slip angle right? And id ita really non-linear, how are people able to drift cars if its that unpredictable?

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Sebp
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Joined: 09 Mar 2010, 22:52
Location: Surrounded

Re: Cornering stifness

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How about this then:

http://www.mas.bg.ac.rs/istrazivanje/bi ... otovic.pdf

P.S.: Sorry, had the wrong definition in my head.
Last edited by Sebp on 31 Jan 2014, 09:19, edited 1 time in total.
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Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Yeah, but what does this have to do with the thing you just said? :mrgreen: :mrgreen:

Lycoming
Lycoming
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Joined: 25 Aug 2011, 22:58

Re: Cornering stifness

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non-linear does not necessarily mean unpredictable.

Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Lycoming wrote:non-linear does not necessarily mean unpredictable.
How can you predict something that doesnt go up/down linearly?

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Sebp
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Re: Cornering stifness

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As I said I got confused :oops:

Shame on me :D
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Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Sebp wrote:As I said I got confused :oops:

Shame on me :D
I am also confused :wtf: :wtf:
Shame on both of us :(

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Sebp
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Re: Cornering stifness

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Erunanethiel wrote:
Lycoming wrote:non-linear does not necessarily mean unpredictable.
How can you predict something that doesnt go up/down linearly?
You run loads of tests and establish a working mathematical model for your parameters.
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Erunanethiel
Erunanethiel
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Joined: 26 Oct 2013, 10:17

Re: Cornering stifness

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Sebp wrote:
Erunanethiel wrote:
Lycoming wrote:non-linear does not necessarily mean unpredictable.
How can you predict something that doesnt go up/down linearly?
You run loads of tests and establish a working mathematical model for your parameters.
No I mean when you are driving it, like drifters :mrgreen: