The third round of testing at Calspan will be conducted on 21-22 June 2007. Four constructions are scheduled to be tested:

+ Michelin 21x8-13 (radial)
+ Hoosier 20.5x7-13 R25A
+ Hoosier 20x7.5-13 R25A
+ Goodyear D2692 20x7-13

The test plan is similar to that used in the first two rounds of testing, with a few additions. These tires will be tested on rim widths of 6, 7 and 8 inches to measure the effects of rim width on the tire characteristics. The drive/brake tests will be conducted at a few non-zero slip angles to measure friction ellipse effects. The test plan also includes a tire wear study.

Students are welcome to attend the tests at the Calspan Tire Research Facility in Buffalo, NY. Please contact me at kasprzak@localnet.com to make arrangements.

All consortium members will receive the data on DVD a few weeks after the test is completed.

This text, and a full description of the Formula SAE Tire Test Consortium, can be found at http://www.millikenresearch.com/fsaettc.html

Very cool! Can't wait to see this stuff.

I made this a sticky - just to make sure everyone has a chance to see this (and get in on it if they haven't yet).

I figured I would leave it a sticky until after this round happens. I could leave it up longer...

We are interested in joining this, but I'm assuming we do not have to pay before the testing date to get all current data?

You can buy in whenever, at which point you get multiple DVDs of goodness from all testing to that point. When further testing is done, you get more. Its an F sweet deal.

Any chance of going to higher slip angles so we can actually see a peak? Or is the lack of a peak just from the low load?

You can see peaks in a lot of the data / fits, theyre just not very pronounced. Beats me why, as far as I'm aware 15 degrees is a lot of SA. But if the machine can do it, a little more would be cool.

By the way for anyone thinkin bout joining the TTC.. I'd say its one of the best investments you can make. Doesn't matter if you know much about vehicle dynamics or tires or suspension, or have any formal training with tire modeling. Just by lookin at the data, playing with all the non dimensional modeling in Matlab, etc.. you learn a ton.

So is that the new goodyear compound, two new hoosier sizes and then the michelins that auburn was running, correct?

quote:

Originally posted by Jersey Tom:
By the way for anyone thinkin bout joining the TTC.. I'd say its one of the best investments you can make. Doesn't matter if you know much about vehicle dynamics or tires or suspension, or have any formal training with tire modeling. Just by lookin at the data, playing with all the non dimensional modeling in Matlab, etc.. you learn a ton.

I definitely second that one. TTC data is just about the best 500$ you can spend on your car. The amount of understanding of your you can get from the data is phenominal, and you will definietly be able to make a stronger, lighter, and faster car.

Are the Michelin's the FBMW tire, or the custom ones Auburn runs? I understand they have different compounds that you can't get off the shelf.

quote:

Originally posted by redline987:
Are the Michelin's the FBMW tire, or the custom ones Auburn runs? I understand they have different compounds that you can't get off the shelf.

Could be i just thought whatever auburn has was the new michelin fsae tire or whatever.

I really hope its their new one, but 21 x 8 seems pretty F big!

Where did calspan come up with the idea to test rim widths and combined loading conditions?

If I remember right the rim widths has been an idea since before Round 1. I'm actually very curious to the effect of running wide rims on relatively narrower tread sections. For example looking at old F1 photos, all the Goodyears on really wide rims.

And I'll say from experience the 2692 on a 6 or 6.5 rim is not happy times. Can't get more than 5.5" of contact even at 8psi.

I very strongly second the idea to do sweeps beyond the peaks. I have been trying to do some simulations for my thesis and the software I am using allows for the input of Pacejka 96 coefficients but it searchs for a peak and crashes if there is no peak. I agree with Tom in that it is strange the peaks (or lack there of) seen in the previous data are hard to explain.

Olly
UNSW@ADFA

How were the decisions made on what testing should be conducted in this round?? Was the original data consulted as to which tyres the teams in the consortium would have liked tested?? I guess i would have thought it would have been very beneficial to see some avon tyres put through their paces considering the large number of teams running them around the world. I'm for sure interested in seeing the radial comparison but was this tyre even on the original selection?


Ash
Deakin University
Australia

This is the third round of testing, as far as I know the avon's were tested in the second round.

So, is the Michelin 21x8-13 the same as the 16/53-13? If it is then which tire is being tested in this size? According to the Michelin Motorsports brochure there are three tires in that size; the FR-2.0 (which is the newest slick), the S210 (slightly older slick), and the P220 (rain tire). If anyone can clarify which tire is being tested that would be great.

Dave

quote:

Originally posted by Dave_Dal:
So, is the Michelin 21x8-13 the same as the 16/53-13? If it is then which tire is being tested in this size? According to the Michelin Motorsports brochure there are three tires in that size; the FR-2.0 (which is the newest slick), the S210 (slightly older slick), and the P220 (rain tire). If anyone can clarify which tire is being tested that would be great.

Dave

Michelin NA has been developing an FSAE exclusive tire for a number of years. They have been developing it with Clemson and now Auburn and Georgia Tech. I have spoken with Michelin NA on a couple of occasions and they have been getting it ready to sell to the teams... it might be ready to sell now, I'm not sure as it has been several months since I last spoke to them.

quote:

Originally posted by Jersey Tom:
Its an F sweet deal.

Claude?

I have never known what this event is, and finally decided I should...someone fill me, and all the newbies in on what goes on, where, who, and what is available at what cost.
Thanks