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Thread: Does Anyone Know What the Heck is Going on at Goodyear!?

  1. #11
    Member
    Join Date
    May 2008
    Location
    Deakin,VIC,Australia
    Posts
    88
    Originally posted by Claude Rouelle:
    " many tires on the market from 8" diameter to 15" and over "
    Claude, in reference to rule:
    T6.3 Wheels
    T6.3.1 The wheels of the car must be 203.2 mm (8.0 inches) or more in diameter.

    Would you consider this dimension to refer to the rim diameter or the outside diameter of the tire (I am feeling a little sleepy - tyre)? To me, the wheel consists of both the rim & tire as well as whatever connects the rim to the hub.

    The rule could read '203.2 mm (8.0 inches) or greater rim/tire size' to be clearer, or if the dimension is intended to relate to the outside diameter of the tire (surely not?) then it should read as such! It could open the floodgates to karting wheels with very interesting suspension & braking packages starting to appear!

    Ultimately a rules committee clarification, but a little discussion here couldn't hurt?

  2. #12
    Member
    Join Date
    Jan 2010
    Location
    Polytechnique Montréal
    Posts
    45
    Yeah, well, we just completed our design(are about to, putting fasteners and the electrical loom in the CAD as we speak).. with the Goodyears.

    Anyways, gonna have to look into other tire solutions. Also, we've managed to provide some adjustability on the chassis side so we should be able to figure something out. (sometimes being an anal team leader pans out )

    As a side note, anybody have an idea of how many Goodyears are still in stock?

    Tomorrow s gonna be a gold rush if any are left
    Paul Charbonneau
    Formule Polytechnique Montreal
    2009 - 2012 - Suspension Lead
    2012 - 2013 - Team Captain
    2013 - 2014 - Suspension and Electronics Lead

  3. #13
    Paul,

    We tried buying some new Goodyear tires before FS Spain and Goodyear Motorsport Germany told us there aren't anymore. Perhaps in the US/Canada there are still some sets. Some teams from Australia have also e-mailed us asking for tires, so apparently there aren't any in Australia anymore either.
    Stefan Nasello
    Queens University Racing - Project Manager 2009
    Rennstall Esslingen - Suspension Team 2010

    www.qfsae.com
    www.rennstall-esslingen.de

  4. #14
    Originally posted by Claude Rouelle:
    That being said, as a design judge, that is question I often asked to students: IF circumstances force you to switch from tire A to tire B, what would you change (or have changed) in the car suspension concept and in your car setup (spring, damper, ARB etc..). For some teams this hypothetical question does become a reality.
    This. Welcome to the rest of your lives, design for one thing then have to change at the last minute due to supply issues.

    This will be hard on the teams just starting testing for FSAE-A.
    Brent

    3rd world solutions for real world problems.

    UoA FSAE 2004-2008

  5. #15
    Senior Member
    Join Date
    Jun 2007
    Location
    Perth Western Australia
    Posts
    211
    Oh no, this is sad news.

    If any teams want to sell their current stock of 2704s to change to an alternative brand UWA would be interested in buying them from you.

    Pete

  6. #16
    Originally posted by dazz:
    <BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Claude Rouelle:
    " many tires on the market from 8" diameter to 15" and over "
    Claude, in reference to rule:
    T6.3 Wheels
    T6.3.1 The wheels of the car must be 203.2 mm (8.0 inches) or more in diameter.

    Would you consider this dimension to refer to the rim diameter or the outside diameter of the tire (I am feeling a little sleepy - tyre)? To me, the wheel consists of both the rim & tire as well as whatever connects the rim to the hub.
    </div></BLOCKQUOTE>

    I believe the rule is clear. To put it simply, the wheel is the metal part and the tire is the rubber part. Tires are mounted on wheels, and the wheel does not include the tire.
    Dr. Edward M. Kasprzak
    President: EMK Vehicle Dynamics, LLC
    Associate: Milliken Research Associates, Inc.
    Co-Director: FSAE Tire Test Consortium
    Lecturer: SAE Industrial Lecture Program
    FSAE Design Judge

  7. #17
    Way back whenever, the 8" wheel diameter rule was introduced to specifically rule out the use of 5" and 6" go kart tyres. I seem to remember it was part of the 'anti go kart' movement that introduced the 2" suspension rule.

    So, Ed is right. 8" minimum diameter refers to the wheel, not including the tyre.

    Cheers

    Pat
    The trick is ... There is no trick!

  8. #18
    Originally posted by Edward M. Kasprzak:
    To put it simply, the wheel is the metal part and the tire is the rubber part. Tires are mounted on wheels, and the wheel does not include the tire.
    I'm just a curious non-native English speaking guy: How do you call a tire mounted on a wheel? Wheel assembly?

    In German there are two words that can refer to the wheel (the metal/CFRP part). One of them refers to the wheel only ("Felge") while the other ("Rad") may refer to the tire & wheel assembly but also to the wheel of a carriage/horse buggy. Moreover, the word for tire ("Reifen") often refers to the tire & wheel assembly, not to the tire alone.
    Tilman Schröder
    GETracing Dortmund, alumnus
    University of Technology Dortmund, Germany

  9. #19
    Senior Member
    Join Date
    Mar 2008
    Location
    Brighton, MI
    Posts
    677
    The wheel would be a rim, a tire would be a tire, and a wheel would be a tire + rim + gas(maybe) + stem plus liner plus flap, etc...

  10. #20
    Originally posted by BillCobb:
    The wheel would be a rim, a tire would be a tire, and a wheel would be a tire + rim + gas(maybe) + stem plus liner plus flap, etc...
    Hmm, obviously Forgot the word rim ...
    Tilman Schröder
    GETracing Dortmund, alumnus
    University of Technology Dortmund, Germany

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