CM category suspension design

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mep
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Joined: 11 Oct 2003, 15:48
Location: Germany

Re: CM category suspension design

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There are some michelin (FSAE) tire datas available in the net. I think we could use them to make a topic where we talk about how to use tyre datas.
I made a quick search for them but could not find them in second but thats no problem I have the excel file on my pc and already did start to make some charts.

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delacf
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Joined: 23 Feb 2010, 01:32

Re: CM category suspension design

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Thanks, 747heavy
mep wrote:There are some michelin (FSAE) tire datas available in the net. I think we could use them to make a topic where we talk about how to use tyre datas.
I made a quick search for them but could not find them in second but thats no problem I have the excel file on my pc and already did start to make some charts.
That would be great. AVON provides all the information you can imagine for the FSAE (spring rate, Pacejka Coefficients and Rig data).

http://www.avonracing.com/Downloads.aspx

Is a pity that (AVON) not continuing to provide the Formula Ford. Dunlop does not give much information.

Regards, delacf

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747heavy
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Joined: 06 Jul 2010, 21:45

Re: CM category suspension design

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some of the Michelin Formula SAE data - not the interesting ones :wink:

http://www.michelinman.com/media/en-US/ ... ackage.pdf

maybe you find this interesting / helpful

http://www.optimumg.com/OptimumGWebSite ... nTrack.pdf
http://www.optimumg.com/OptimumGWebSite ... arison.pdf

and a nice Good Year add. I know it´s aimed at Formula SAE, but holds a lot of truth for most motor sport disciplines.
I´m sure that when the time comes for you, you will remember parts of it (most likely in the middle of the night :lol: ).

Image
Last edited by 747heavy on 03 Oct 2010, 18:16, edited 1 time in total.
"Make the suspension adjustable and they will adjust it wrong ......
look what they can do to a carburetor in just a few moments of stupidity with a screwdriver."
- Colin Chapman

“Simplicity is the ultimate sophistication.” - Leonardo da Vinci

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747heavy
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Joined: 06 Jul 2010, 21:45

Re: CM category suspension design

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nothing you will need straight away, but maybe useful for later.

http://www2.ee.ic.ac.uk/cap/publication ... rm_tyr.pdf
http://www.theoryinpracticeengineering. ... deling.pdf

worth to have a quick read here
http://www.millikenresearch.com/TTC_SAE_paper.pdf

also worth to have a look here, you will find some interesting discussions going on, on the topic of tire data, how to use them (or not) and suspension design.
http://fsae.com/eve/forums/a/frm/f/125607348


this book is worth a read to start getting an understanding about the tire / car / road interaction. It´s written in a way, that you will understand most of it, even if you are not an tire engineer.

http://www.sae.org/images/books/toc_pdfs/R351.pdf

Also worth to have a read here, the blog of our foum member Jersey Tom, he may will be able to guide/help you, if you ask him nicely, as I think he knows more about tires, then most others here.

http://fsae1000.blogspot.com/2009/04/am ... -data.html

Another person worth to ask/contact, especially, when it comes to Dunlop tires is UrBen, also a valued member of this forum. He maybe able to help with some informations about the Dunlop FF tires.

Another quick and easy read on the subject (nothing magic, but worth the time)
http://www.formulastudent.de/academy/pa ... cle/tyres/
Last edited by 747heavy on 03 Oct 2010, 18:18, edited 2 times in total.
"Make the suspension adjustable and they will adjust it wrong ......
look what they can do to a carburetor in just a few moments of stupidity with a screwdriver."
- Colin Chapman

“Simplicity is the ultimate sophistication.” - Leonardo da Vinci

marcush.
marcush.
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Joined: 09 Mar 2004, 16:55

Re: CM category suspension design

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oh man I´m loving it .best add for years.. :mrgreen:

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

Re: CM category suspension design

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I'll give you one guess as to who made that ad :)
Grip is a four letter word. All opinions are my own and not those of current or previous employers.

marcush.
marcush.
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Joined: 09 Mar 2004, 16:55

Re: CM category suspension design

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JT ...thanks for the little hint...it was obvious that only someone who has true passion for this sport and has gone through it all could come up with this ...

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delacf
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Joined: 23 Feb 2010, 01:32

Re: CM category suspension design

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\:D/

[-o< [-o< [-o< 747heavy [-o< [-o< [-o<

Thanks

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747heavy
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Joined: 06 Jul 2010, 21:45

Re: CM category suspension design

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some simple calculations, which you may find useful at on etime or the other. (maybe not :wink: ).

P.S.:
Take the proposed 1:3 bump/rebound damping force split with a grain of salt.
This is not set in stone, and in recent times the ratio for non aero cars is often closer to 1:1 or at times 1.5:1 (higher bump damping).
For cars which strong aero performance dependent on ground clearnce (ride hight) or in applications where you want to bypass/circumvent a minimum ride height rule (imposed by the regulations) things are a bit different.
Excessive rebound damping will lead, most often, to a loss in tire grip (acceleration perfomance/power down).

The higher rebound damping approach you will find in older publication/textbooks is partly derived from road cars (here you use it mainly for comfort reasons) and also, more important due to limitations in older damper designs, where you had practical limits as how much bump damping you could generate without other detrimal effects. The advent of new damper arcitectures ( through shaft dampers, spool valves etc) has done much in this respect.


http://www.theoryinpracticeengineering. ... meters.pdf
"Make the suspension adjustable and they will adjust it wrong ......
look what they can do to a carburetor in just a few moments of stupidity with a screwdriver."
- Colin Chapman

“Simplicity is the ultimate sophistication.” - Leonardo da Vinci