FSAE Tire Test Consortium -- Round 8

[DougMilliken]

This post is to announce Round 8 testing:

+ Testing at Calspan TIRF is scheduled for Monday July 30th - Wednesday August 1st.

+ After gauging student interest, reviewing the tires currently used at Formula SAE/Student events and talking with the tire manufacturers (including some not represented below), the following tire constructions have been chosen:

Hoosier 43070, 16.0 x 6.0 - 10, R25B (free-rolling only, no drive/brake data)
Hoosier 43070, 16.0 x 6.0 - 10, LCO (free-rolling only, no drive/brake data)
Hoosier 43075, 16.0 x 7.5 - 10, R25B (free-rolling only, no drive/brake data)
Hoosier 43075, 16.0 x 7.5 - 10, LCO (free-rolling only, no drive/brake data)
Continental 43329, 205/470R-13 (free-rolling & drive/brake)
Goodyear 2704, 20.0X7.0 13 (free-rolling & drive/brake)

+ The test plan will be nearly identical to Rounds 6 & 7.

+ TTC members are welcome to attend the tests in person. If you are interested, please contact Dr. Kasprzak. Calspan is located in Buffalo, New York, USA.

+ Data will be posted to fsaettc.org (http://fsaettc.org) as soon as possible after the tests.

We will provide updates on the private forum as they become available.

As always, thanks to all that make the TTC possible.

[coleasterling]

Hi Doug, this is awesome! Can you give more detail about why you can't drive the small Hoosier 10's? Along with that, is there any possibility of testing 8" tires free-rolling, the same as the small 10's?

[DougMilliken]

... why you can't drive the small Hoosier 10's?

The minimum spindle height (minimum loaded radius) at TIRF is 7.85 inches (19.95cm) so these tires might just reach the roadway--but only at a very light load and with no lateral tread flex. Same problem occurred with the 10" Avons from Round 7 (similar tire OD). To test free rolling only, the main spindle is locked and an offset spindle (made from a boat trailer spindle) is attached. There is at least one thread about small diameter tires on the TTC secure site.

It should be possible to test 8" tires on the same offset adapter. Do you know how many teams are using these?

[coleasterling]

Thanks! As far as I know, there aren't any teams running 8's right now. With the release of the new, nominally 16" diameter tires, it may mean there won't be any in the future, either. Most of the 8" tire options are nominally 15", with an actual rolling diameter of 15.5" or so. I was mainly just curious as to the capabilities of the setup.

[shmahoog]

Can't wait to see the data! What rim widths did you use on the 16" Hoosiers?

[DougMilliken]

6" & 7" for the 6.0 wide tires. 7" & 8" for the 7.5 tires.