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...
@ 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...
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...
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...
@ 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...
@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...
@ 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...
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"...
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...
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...
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]...
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...
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...
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...
o.k. I found another photo, which may helps to get the gist of the idea about how the "floating" spring/damper unit is working.
it is not exactly the same system as used on the Radical, but the principle is the same - IMHO
the "nik-link" ARB would come "on top" of it, but one isn't needed for...
Hi Golfpin
Glad to hear, that you found the photos useful.
Sorry I'm on a mobile, at the moment, and can't "draw" a sketch or something, but you have to think about the rocker having three "legs/arms", but you only see two in the photo.
The small pushrod, you see connects to the rockers...
Hi Golfpin
I may see this wrong, but I "think" the term fully floating spring/damper unit refers to the fact, that the spring and damper get "double actuated" [not sure if this is a good term], similar to concepts you find in some motor cycles.
In simple terms, both ends of the spring/damper...
o.k. - I know, that this isn't a damper/shock dyno
Nevertheless, it shows a quite typical "drive" application
motor --> belt drive --> (crank) shaft, which is supported by two off the shelf pillow blocks with roller bearings.
Something like this, is used in many damper/shock dynos too
You can...
