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  1. Replies
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    This. All day long...! Ben

    This. All day long...!

    Ben
  2. Thread: Roll rates in RCVD

    by ben
    Replies
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    39,295

    So warp soft with tunable LLTD... Much as Z...

    So warp soft with tunable LLTD...

    Much as Z rubs people up the wrong way I actually have as big a problem with people denying something can be done by just stating "we were really smart yet didn't...
  3. Thread: Roll rates in RCVD

    by ben
    Replies
    104
    Views
    39,295

    So just to clarify Z on the aero tunnels acting...

    So just to clarify Z on the aero tunnels acting as balance beams. So if you move the longitudinal position of the U-bar attachment along the beam you change the roll stiffness distribution?

    Ben
  4. Thread: Roll rates in RCVD

    by ben
    Replies
    104
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    39,295

    Sorry Dyantune race tracks are not billiard table...

    Sorry Dyantune race tracks are not billiard table smooth. Far from it. The reality is that aero dominates so heavily in most categories that what would be considered "good" suspension characteristics...
  5. Thread: anti dive setup

    by ben
    Replies
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    44,713

    Great info as ever from Z. To answer the...

    Great info as ever from Z.

    To answer the anti-dive question from Jpusb in my own way; in my experience anything above 25% anti-dive tends to be perceived negatively by the driver. This is another...
  6. Thread: anti dive setup

    by ben
    Replies
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    44,713

    Excellent post Tim. Thank you. I think I had...

    Excellent post Tim. Thank you.

    I think I had the same epiphany looking at Z's diagram of jacking forces. I now genuinely don't think geometric roll centres are a good teaching tool at all. They...
  7. Thread: anti dive setup

    by ben
    Replies
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    44,713

    This is a great thread and discussion between...

    This is a great thread and discussion between three engineers I've had the pleasure of meeting in person (Tim, Claude and Geoff) and one I haven't in Z.

    I have to say in Z's favour that his...
  8. Thread: Sacli Suspension

    by ben
    Replies
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    4,706

    This looks like a textbook example of setting a...

    This looks like a textbook example of setting a very narrow design goal rather than a vehicle system level target.

    The camber control might be a good thing, but in the negative column is the extra...
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    It doesnt matter one iota. Nobody cares. We...

    It doesnt matter one iota. Nobody cares.

    We use the ride frequency to get a baseline value for the spring rate and then we move on. The final spring value is then refined after looking at load...
  10. Thread: Pitch point

    by ben
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    Do you not think some bias against Indian teams...

    Do you not think some bias against Indian teams is valid? If we can't criticise poor engineering and bizarre local regulations, which dominate the Indian comp more so than any other, without being...
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    Just checked, I joined on September 15, 2002! ...

    Just checked, I joined on September 15, 2002!

    Time does indeed fly... http://fsae.com/groupee_common/emoticons/icon_wink.gif

    Ben
  12. Replies
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    Sure, it will do "something." There are some...

    Sure, it will do "something." There are some traditional Coulomb friction forces at work which would be reduced, and more importantly the thicker the layer the less tread rubber that can be engaged...
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    I've been using OptimumT for the past few years,...

    I've been using OptimumT for the past few years, but prior to that I wrote my own fitting routines in Matlab using the optimisation toolbox. You can use Excel Solver to be honest too.

    The general...
  14. Thread: Suspension Design

    by ben
    Replies
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    100,231

    Z's last post: Mock someone for suggesting...

    Z's last post:

    Mock someone for suggesting Wikipedia as a reference.

    Link to Wikipedia article to support own view... ;-)

    Ben
  15. Thanks for the reply. My concern with this...

    Thanks for the reply. My concern with this approach is that you're assuming the model is correct therefore the tyre model that fills in the gaps must represent the tyre.

    Presumably if you...
  16. Thread: Suspension Design

    by ben
    Replies
    303
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    100,231

    Now your just being facile. Tennis is just...

    Now your just being facile. Tennis is just hitting a ball over a net - can I be a Grand Slam winner please?

    Understanding the underlying engineering concept is often a tiny part of the battle,...
  17. Thread: Suspension Design

    by ben
    Replies
    303
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    100,231

    Z: FSAE is an engineering competition with the...

    Z: FSAE is an engineering competition with the stated goal of creating a car for the weekend autocross racer. If the weekend autocross racer expects to see pushrod and rocker suspension because F1...
  18. Danny, Have you done any correlation of your...

    Danny,

    Have you done any correlation of your model against a flat-track tyre test of the same tyre?

    Regards,

    Ben
  19. Replies
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    University of Auckland:...

    University of Auckland: http://www.facebook.com/UoAfsae

    Nuts look flat-faced too:

    http://sphotos-f.ak.fbcdn.net/hphotos-ak-prn1/527029_449709078382470_2103869950_n.jpg

    Ben
  20. Replies
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    Happy Z presumably: ...

    Happy Z presumably:

    http://sphotos-e.ak.fbcdn.net/hphotos-ak-prn1/534818_409300165756695_2113586278_n.jpg

    Ben
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    I don't want to come across as harsh, but I fear...

    I don't want to come across as harsh, but I fear it might be difficult.

    I totally agree with Claude, Kevin, and Geoff. Each of these guys has, in there own way, contributed massively to the...
  22. Excellent post Geoff. Obviously FSAE-A isn't...

    Excellent post Geoff. Obviously FSAE-A isn't directly relevant to me so I won't offer a view there, but you've basically articulated why I left both the SAE and I Mech E as soon as I saw the...
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    Congrats to all. I had the pleasure of judging...

    Congrats to all. I had the pleasure of judging Chalmers on Friday. The level of race engineering knowledge they'd gathered from a considerable testing programme was impressive.

    The moral of this...
  24. Thread: Teams from India

    by ben
    Replies
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    141,197

    True, but more Fz means more cornering stiffness,...

    True, but more Fz means more cornering stiffness, which means less lateral sliding energy, which means you need (or can use, depending on your perspective) softer compounds...

    Which incidentally...
  25. Thread: Teams from India

    by ben
    Replies
    594
    Views
    141,197

    Hi Claude - good to catch up at Lime Rock this...

    Hi Claude - good to catch up at Lime Rock this weekend. Looking forward to Silverstone this week too.

    Without wanting to be a smart-arse tyre guy (too late I suspect... ;-) ) but I think at 132Kg...
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