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Type: Posts; User: Zac C

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    If I remember correctly I think the D2697 was a...

    If I remember correctly I think the D2697 was a casualty of a directive to make most of the sportscar line REACH compliant. As far as I know that directive is still in place and the FSAE stuff is...
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    Vehicle Dynamics Openings at Goodyear

    For anyone interested, there are a few openings in the Vehicle Dynamics group at Goodyear. There is a lot of opportunity here for someone that wants to dig into instrumented vehicle testing, indoor...
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    Bill, unless a team has done something on their...

    Bill, unless a team has done something on their own, the only physical F&M data that exists on these tires was collected at TIRF by the FSAE TTC. We certainly did a lot of modeling and lab testing as...
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    Maybe I should finally get around to dumping the...

    Maybe I should finally get around to dumping the stash of K&C data I've collected on various FSAE cars over the years. Even among the "good" cars (event winners) there were interesting things that...
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    Yeah, I've used data from both types of machines,...

    Yeah, I've used data from both types of machines, as well as some one offs that various OEMs made before K&C rigs were available as a turnkey solution. I'd agree with your assessment. In terms of...
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    You probably need to make something either...

    You probably need to make something either shorter or longer.



    The car will flip and you'll (probably) kill your driver.
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    As far as I know there's only one person that's...

    As far as I know there's only one person that's had extensive experience with both the MTS and ABD machines. His take is that both machines are more or less equivalent in terms of capabilities. The...
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    depends on the FSAE car. I've been to FSAE test...

    depends on the FSAE car. I've been to FSAE test sessions where a golf-kart had FTD until after lunch.

    I'm not sure a bike or motorcycle would do very well on a typical FSAE course though. It'd do...
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    25+ foot coils of brake line aren't difficult to...

    25+ foot coils of brake line aren't difficult to find. just supply your own fittings and bobs your uncle.
  10. Thread: Custom Wheels

    by Zac C
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    Claude, I understand why you're doing it, but...

    Claude,
    I understand why you're doing it, but your constant harping on people to fully identify who they are and where they are from on this forum is getting to be an order of magnitude more...
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    It might be time for some of you boys to start...

    It might be time for some of you boys to start shaving.
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    If only there was someone out there that has done...

    If only there was someone out there that has done multiple K&C tests on event winning cars...

    If I get some free time in the next week or so I'll run through my database and post some hard numbers...
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    As a good insulator, rubber doesn't have any...

    As a good insulator, rubber doesn't have any coulombs.
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    MX data can pretty easily be processed into a...

    MX data can pretty easily be processed into a pneumatic scrub value, which represents the lateral location of the normal force vector. If you plot pneumatic scrub vs. slip angle for a pretty big...
  15. You still aren't actually thinking about the...

    You still aren't actually thinking about the problem.
  16. and if you actually understood the practical...

    and if you actually understood the practical application of theory you would realize that T/theta = kt = JG/L. You are going down a rabbit hole of non-value added analysis.

    you need to stop...
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    pa - jay - ka

    pa - jay - ka
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    You want chapter 4.3.2 of pacejka's book. A...

    You want chapter 4.3.2 of pacejka's book. A google search turned up this on the front page:

    http://www.rmcet.com/lib/E-Books/Mech-auto/Tyre_and_Vehicle_Dynamics.pdf
  19. Thread: Avon Tires

    by Zac C
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    I would agree with this assessment. My experience...

    I would agree with this assessment. My experience has been that at any given competition, 75+% of the field will show up with a car closer to the 'complete basket case' end of the spectrum than...
  20. Thread: Avon Tires

    by Zac C
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    I don't know anything about the current Avon's or...

    I don't know anything about the current Avon's or the new compound. The Avon hillclimb tires that a few teams were running 5-6 years ago had good initial grip for stuff like autocross but would start...
  21. For maximum confusion, I recommend the username...

    For maximum confusion, I recommend the username 'Jersey Tim'
  22. Thread: Leaf Springs

    by Zac C
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    Corvettes didn't really have a trunk between 1963...

    Corvettes didn't really have a trunk between 1963 and 1997. There's just some space behind the seats where you can stash things. Using a leaf spring vs a traditional lower control arm doesn't free up...
  23. Thread: Leaf Springs

    by Zac C
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    GM ran this setup for decades on the rear...

    GM ran this setup for decades on the rear suspension of the Corvette.
  24. The full data set is not publicly available....

    The full data set is not publicly available. Those numbers also only represent what 'good' teams typically achieve, not an optimal target to shoot for.
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    Personally I'm surprised that Indian teams are...

    Personally I'm surprised that Indian teams are still using outdated clincher technology. If you want to be a baller you need to roll on proper hand sewn tubulars like the pros.
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