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Recent content by TC3000

  1. TC3000

    Identification of a part connected between the wheel and axle of a trailer

    as the others have said, it's very likely a part of the braking system. The shaft operates a cam, which then pushes the brake shoes apart. It used to be a quite "common" solution for airpressure operated truck brake systems many years ago, not sure what the current state of the affairs is in...
  2. TC3000

    Spring rates, weight distribution and other things

    @ yoshi just to clarify some things, which you may have gotten in the wrong context. yes, I agree, that structural stiffness will change over time, due to a couple of reasons, the worst effect would be down to corrosion ( which may is a contributor to your front firewall/master cylinder example...
  3. TC3000

    Front Suspension - Geometry hardpoints

    to add a picture, to what Greg & Brian have allready said, take a look below: Here you have shown some elements (red & green), which can be seen as the "links" of a suspension. At the ends, of these links you have points (the small spheres) where they would connect to either the...
  4. TC3000

    Spring rates, weight distribution and other things

    just some things which I noticed by reading his (xhead's) posts The wheelrate is normally the bar/spring rate multiplied by the SQUARE of the linkage/motion ratio. Also be aware/careful how this ratio is expressed/calculated. He says it's 1.1 (wheel/spring), why others may use the inverse...
  5. TC3000

    Spring rates, weight distribution and other things

    @ yoshi (I haven't read the whole thread on the other forum in detail, just scanned over it, reading parts in detail, while skipping others) Yes, I know, that xhead, meant this to be a method to "get you in the ball park", and the other guy seemed happy with the end result too, so everybody...
  6. TC3000

    Spring rates, weight distribution and other things

    @yoshi IMHO - there are a couple of things which got overlooked/brushed under the carpet in xheads explainations. He makes a couple of assumptions, that may not always are true (more often then not IMO), like that you can assume a DI of 1, in heave and pitch, meaning that there is no heave...
  7. TC3000

    Radius of gyration

    @ GG No Problem with being precise, you are correct, that moving the battery all the way to the rear, may doesn't help with MoI or has the potential to make it worth. In terms of reduction in k, Boris should move it to the CG position, so that the mass*r^2 contribution vanishes, and only the MoI...
  8. TC3000

    Radius of gyration

    O.K. - I just looked up the other "rule of thumb" formula MoI_z = 0.1296*mass[kg]*wheelbase[m]*overall length[m] ---> the 0.1296 is a regression coefficient (fudge factor) to fit a curve onto the measured data of 56 German production cars ( Rau et.all), but this approach is a bit "dated"...
  9. TC3000

    Radius of gyration

    G'day Boris, I think, you may mixing/confusing two different terms here. yaw radius of gyration (often labeled k) and a measure, which is known as the Dynamic Index in yaw (DI). The often as "rule of thumb" cited DI=1 for a full sized sedan, is not the same as a yaw radius of gyration of 1 m^2...
  10. TC3000

    VW DCC semi-active dampers

    to see the difference between a "fully active" and a "adaptive" (sometimes called semi-active) system, you may want to take a look at the following presentation, which compares Tenneco's "active" (ACOCAR) and their "adaptive" (DDC, CES etc.) systems, under different conditions...
  11. TC3000

    VW DCC semi-active dampers

    Hi Jason, Please remember, that such a system is not "active", it doesn't supply energy to the suspension. It's a form of an "adaptive" damper control, which can vary the energy disipation in the suspension, according to some parameters. AFAIK the VW system comes from Monroe [Tenneco]...
  12. TC3000

    How does this suspension work?

    Now, I may see this wrong, but from what I gather, you may have a "secondary" effect at play here. I don't think, that you actually "preload" your anti roll / sway bar with what you do, but you may get a effect, which feels like "having a bigger bar", and from your comments, there seems to be a...
  13. TC3000

    "new" roll/sway bar concept

    I apologize for the rather poor/none technical quality of the illustration (Excel is all I have on this machine), but I hope nonetheless that it helps to illustrate the principle function of the "NIC-LINK" , and the underlying idea/concept. In a nutshell, where a conventional ARB/swaybar makes...
  14. TC3000

    "new" roll/sway bar concept

    you are welcome golfpin - glad to hear, that you got something useful out of it. in regards to your other inquiry, about heave &/or 3rd springs, you may want to take a look at his images and I'm sure you have come across the typical Formula Vee layout before, this is one way, to implement a...
  15. TC3000

    "new" roll/sway bar concept

    small addition: I think, this should clear it up, where the "nik-link" connects and how it is supposed to work.
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