Because We can't send Rich Text, or HTML formatted messages, I have resent this
in normal plain test format. To view the text picture below, highlight that
section and change it to a fixedsys type font.
Rich
-----Original Message-----
From: Rich Atherton <gumby@connectexpress.com>
To: vees@erols.com <vees@erols.com>; alpines@autox.team.net
<alpines@autox.team.net>
Date: Saturday, May 30, 1998 7:52 PM
Subject: Re: locating rear susp
I had thought about this very thing a couple of months ago, but for a
different application, but it would work here as well The Idea is a modified
Panhard rod X 2. connected to opoist points (top and bottom) on a pivoting
plate which is attached to a bracket bolted or welded to the differential. It
won't do anything for wheel hop, but will provide an absolute position
(adjustable center point) for the rear axle. Rhudimentary picture below. If
you want a better one, email me personally and I'll send yo the picture I
created for this, we can't send attachment through the list. Here's the
Picture. panhard system exagerated in size here.
o~~~~~~~~~~~~~~~~~~~o
/ B \
||||||| | o |~~~~~~~~~~~~~~~~~o |||||||
||||||| ----- |||||||
||||||| / \ |||||||
|||||||==================| |==================|||||||
||||||| \ / |||||||
||||||| ----- |||||||
||||||| |||||||
The "o" represent panhard rod tie rod ends. The "B" is the pivot point in the
bracket. The plate is diamond shaped (not seen here) with a pivot at the top
and bottom. The can rotate around the center pivot "B". OK, as the axel drops,
the panhard rods rotate the plate but keep the axel exactly in the center.
Someone with autocad coutld work out the actual geometries, becasue there is
still a problem that needs to be worked out. If only one wheel rises, (the left
wheel for this argument) the entire axle will have to swing up in an arc
pivoting at "B" Obviosly, this isn't a good thing. So initially this pivot
point should be as vlose to axel center line as possible. It may be possible to
do this on the back side of the differential. The "o" connections at least at
the frame end will need to be rubber mounted like normal suspention mounts.
This will give "some" play.
Let me know what you think!!
Rich
BTW this is best viewed in Fixedsys font
-----Original Message-----
From: vees@erols.com <vees@erols.com>
To: alpines@autox.team.net <alpines@autox.team.net>
Date: Saturday, May 30, 1998 7:49 AM
Subject: locating rear susp
>Let me not be misunderstood. I'm not concerned with axle tramp (I
>mentioned I'd seen an interesting setup on Wally Swift's Alpine which
>involves use of horizontally mounted shocks subframe to axle - not sure
>what it does, but if you've seen Wally at an auto-x.....). My concern
>is with rear spring squirm. Although running Tiger leafs (stiffer), I'm
>looking for an elegant and simple method to prevent lateral movement of
>the rear wheels in turns (as in road race application). Panhard rod is
>a compromise because it allows the rear wheels to move in an arc with up
>and down movement of the body and a Watts linkage appears to allow no
>wheel arcing, but looks heavy, complicated and expensive. The A-arm
>(v-shaped assy mounted by brackets on the subframe to a single bracket
>on the differential housing) looks intriguing because it appears to
>arrest side-to-side axle movement, allow the wheels to move up and down
>only and, as a side benefit, resist tramp. Thoughts, analysis.....?
>
>Regards,
>
>Mike Veesart
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