Tire Test Consortium (FSAE TTC) is a volunteer-managed organization of
member schools who pool their financial resources
to obtain high quality tire force and moment data targeted for Formula SAE
and Formula Student competitions.
The FSAE TTC's role is to gather funds from registering member schools, organize & conduct tire force & moment
tests and make the data available to individuals at member schools.
TTC is co-directed and managed by the following volunteers:
- Dr. Edward M. Kasprzak (EMK Vehicle Dynamics
LLC, Milliken Research Associates, and FSAE Design Judge) --
liaison with Calspan TIRF and MRA, tire test coordinator, data
distribution, secure forum registration
- Douglas Milliken (Milliken Research Associates,
FSAE Design Judge) -- FSAE TTC treasurer, member school registration,
donated this web space
- Dr. Bob Woods (University of Texas Arlington, FSAE
founding member) -- general project consultation, some liaison with
Seater (formerly of Washington State University) developed and maintains a
secure forum for dissemination of the test data and the open discussion of
all things FSAE TTC at http://www.fsaettc.org Individuals at TTC member
schools may request a forum username—instructions are on the opening
page of the above link. From
2009 through June 2016 this forum was hosted by Washington State
University. The FSAE TTC thanks
WSU for their involvement.
Trimble (University at Washington) was also an FSAE TTC co-founder and
director. The FSAE TTC thanks Denny for his considerable
contributions and wishes him well in his current endeavors.
the FSAE TTC is supported by:
Note: The FSAE TTC is not affiliated
with Milliken Research Associates, Inc. We thank FSAE Design Judge
Doug Milliken for donating this webspace and
agreeing to oversee TTC finances.
(schools) join the FSAE TTC at a cost of US$500 as per the conditions below.
In return, individuals from member schools are granted access to all tire
data measured by the FSAE TTC via individual usernames at the FSAE
TTC private forum. To date, seven rounds of testing have been
completed and additional tests may follow as time and finances allow.
data includes tire force/moments and spring rate info as described below,
for more technical detail please see the SAE
paper by Kasprzak and Gentz.
first round of testing at Calspan was conducted on 27-29
July 2005. Five constructions were tested:
- Hoosier 20x6-13 R25A
- Hoosier 20x7-13 R25A
- Hoosier 18x6-10 R25A
- Goodyear 20x6.5-13 R065
- Goodyear 20x7-13 R065
second round of testing at Calspan was conducted in early February
2006. Five constructions were tested:
- Goodyear 18x6.5-10
- Hoosier 20.5x7.0-13
- Hoosier 20.5x6.0-13
- Avon 7.2/20.0-13
- Avon 6.2/20.0-13
round of testing at Calspan was conducted in early
August 2007. Four constructions were tested on two or three rim
- Michelin 16/53-13 (radial, "B" compound)
- Hoosier 20.5x7-13 R25A
- Hoosier 20x7.5-13 R25A
- Goodyear D2692 20x7-13
round of testing at Calspan was conducted in mid-October
2009. Six constructions were tested, each on two different rim
- Dunlop 175/505R13
- Goodyear 20.0x7.0-13 “D2696”
- Hoosier 20.5x6.0-13 R25B
- Hoosier 20.5x7.0-13 R25B
- Hoosier 20.0x7.5-13 R25B
- Michelin 16/53-13 “Radial X S6B”
round of testing at Calspan was conducted in late-February
2012. Five constructions were tested, each on two different rim
- Continental 205 / 510 R13 M34
- Goodyear D2704
- Hoosier 20.5 x 7.0 - 13 R25B
- Hoosier 18.0 x 6.0 - 10 R25B
- Hoosier 6.0 / 18.0 - 10 LCO
round of testing at Calspan was conducted in early-May
2015. Six constructions were tested, each on two different rim
- Continental 205/510R13 (4914)
- Hoosier 20.5 x 6.0 13 R25B A2500 (Item 43127)
- Hoosier 20.5 x 7.0 13 R25B A2500 (Item 43163)
- Hoosier 18.0 x 7.5 10 R25B (Item 43105)
- Hoosier 18.0 x 6.0 10 R25B (Item 43101) –
- Hoosier 6.0 / 18.0 10 LCO C2000 (Item 41100)
– partial retest
round of testing at Calspan was conducted in March 2016.
These tests were a continuation of Round 6 and were funded by the Cooper
Tire & Rubber Company.
Four constructions were tested, each on two different rim widths:
- Avon 7.0/16.0-10
- Avon 6.2/20.0-13
- Avon 7.2/20.0-13
- Avon 8.2/20.0-13
was performed on rims obtained from Keizer Aluminum Wheels and Diamond
in Rounds 4-7 was much more extensive than in the first three rounds of
testing. Rounds 6 and 7 ran
identical test matrices. A full
description of the Round 6 test plan can be found in the guide to the Round 6 data . New in Rounds 6 & 7 are
low-speed transient tests and slip angle/ratio sweeps at multiple
members can download data from all rounds of testing via the FSAE TTC
secure forum http://www.fsaettc.org.
general, data is collected in a series of sweeps. Slip angle
sweeps--where the slip angle varies from near-zero to a maximum, through
zero to a minimum and back to zero--are used for lateral force data.
Slip ratio sweeps are used for tractive/braking data. Sweeps are
taken at fixed values of inclination angle, inflation pressure, road
velocity and normal load. A collection of sweeps at different values
of these set points composes the test matrix.
are conducted on the Calspan Tire Research Facility flat-belt tire
test machine using 120 grit belt paper and a velocity of 25 mph.
Static and Dynamic (rolling) spring rate tests are run in conjunction with
the lateral force tests.
the details of the tests (specific loads, inclination angles, etc.)
are revised in each round of testing, but the spirit
of the tests remain unchanged.
Members may send a representative to witness any
future tests in person (interested parties please contact Dr.
Kasprzak for details). Video of some testing is available.
collected at 10-100Hz. Output channels include:
- Elapsed Time
- Road Velocity
- Slip Angle
- Inclination Angle
- Slip Ratio
- Normal Load
- Lateral Force
- Longitudinal Force
- Aligning Torque
- Overturning Moment
- Loaded Radius
- Effective Radius
- Wheel RPM
- Tire Pressure
- Tire Surface Temperature (3 locations on the tread)
- Ambient Temperature
- Road Surface Temperature
Data is provided
via the FSAE TTC private forum in both USCS
and SI units. Data is provided
in both ASCII (spreadsheet ready) and Matlab formats. Models of the
data or modeling tools donated by various users may be posted on the
private forum—they are not provided by the FSAE TTC.
OF THE DATA – FSAE TTC LICENSE AGREEMENT
the FSAE TTC data requires agreement to these terms. In short, individuals at member
schools are free to use this data in the design and construction of
their FSAE entries, other school projects and related academic
publication or presentation of the tire data must acknowledge Calspan
Corporation and the FSAE TTC. Individuals and
teams are prohibited from donating or selling the data to any other
individual, group, team or university, or posting it on the
internet. Membership is assigned to the registering school, not an
individual or team at that school.
Individuals not associated with a particular school may join the
FSAE TTC at the discretion of the directors. The data may not be used in any
DETAILS AND MEMBER SCHOOL REGISTRATION
remains open. Individuals at member schools can access data from
all five rounds of testing and any future tests conducted by the FSAE
TTC via individual usernames on the FSAE TTC private forum.
school registration involves completion of the Registration Form and
submission of the registration fee.
To access the data, individuals at a member school may request their
personal username at the FSAE TTC private forum.
are overseen by FSAE Design Judge Doug Milliken, who wrote the following:
Hello to FSAE/FS Teams from Doug Milliken:
At the request of Dr. Bob Woods (UTA), Dr. Edward Kasprzak (MRA) and Mr.
Denny Trimble (UW), I have agreed to keep track of funds to support force
and moment tire testing at Calspan. For their part, our good friends
at Calspan's Tire Research Facility have agreed to run the tests at a
special "student" rate.
Please read this entire note carefully before you send any money. If
there are any questions, please send to Dr. Kasprzak and then watch this
space for an update.
The "FSAE Tire Test Consortium" (FSAE TTC) will
operate as follows:
1. Schools (and any other interested parties) contribute to a common
fund. The contribution amount is currently fixed at US$500.00 .
2. From time to time I will update the account
spreadsheet that lists all the consortium finances. Open with
MS-Excel or the free Open Office
3. When sufficient funds have been collected, Dr. Kasprzak (and
others) will work with Calspan TIRF to test the tires and I will use money
from the fund to pay for the tests and other incidental expenses such as
mailing costs. This should run the bank account down to nearly a zero
balance (but see below).
4. At the completion of the tests, Dr. Kasprzak will make all
the data available to all the contributors. Raw tire data is rare and
quite valuable, I suggest that individual teams
nominate one person to keep the data private and secure (not posted on
5. Excess funds will be applied to future tire tests. When the
time comes to dissolve the FSAE TTC, remaining funds will be put toward
prizes given at the FSAE Competitions.
II. Joining the FSAE TTC
Payment must accompany registration. Due to problems with
electronic fund transfers I am only accepting checks / drafts. The
USA banking system does not "play nicely" with other parts of the
world. Problems have included
extra hidden fees (at originating banks and intermediate banks), incomplete
information supplied by my bank, and many other unique and time consuming
problems. For non-USA schools, please read the following
carefully--the check MUST be:
- Drawn on a USA bank (usually this means
that there is a USA bank name and address printed on the check).
- In US Dollars with US banking system
Routing and Account numbers.
An example of these features can be seen here:
Make the check payable to:
Douglas Milliken, c/o FSAE Tire Test Consortium
Include a printout of the FSAE TTC registration form so I can identify your
school and mail (post) to me at:
245 Brompton Road
Buffalo, NY 14221
Alternately, Western Union will transfer funds electronically--send to
Douglas Milliken at the address above.
Make the transfer in USD, paying all fees (so TTC receives the full
USD $500). Then email me the exact first and last
(family) names of sender and Control Number. You can verify the transfer by using
the Western Union "Track a
If your University requires it, we have prepared a price quote and an invoice (available on
and complete the Registration Form.
Submit this form to Dr. Kasprzak
. Your registration information will be included in
the online financial spreadsheet.
III. Contribution by Milliken
Research Associates, Inc.
MRA is pleased to donate the following to the FSAE TTC:
1. Handle the finances as described above.
2. Web space. Please watch for progress updates (financial
and technical) and answers to any questions.
3. Nondimensional coefficient models
of the tire data in Matlab, including a small program to expand the
coefficients back into data for plotting or for use in other
analysis. See Race Car Vehicle Dynamics
(and Race Car Vehicle Dynamics: Problems, Answers
and Experiments) Chapter 14 for more details.
to Doug Milliken and Milliken Research Associates, Inc. for providing the
space for this webpage.