Off Panhard bar

[FHPREMACH at aol.com]

In a message dated 3/13/99 5:02:40 PM Pacific Standard Time,
bztruck at email.msn.com writes:

<< I agree a solid axle has no jacking. However, a lower rear roll center will
 make a car handle more consistently even with a solid axle. Given a choice,
 I would opt for a low roll center. >>
Hi, 
I have been following this string for a bit and thought I would pass on a
couple things. You might go and find a text with a Lotus Seven live axle
arrangement. they were controlled by two upper parallel links like the top of
a four link, and a triangle that attached to the chassis below the upper links
and ran to a bushing on the bottom of the pumpkin. Roll center was right at
the bushing height. Bushing were good unless the diff leaked, but were easy to
replace. The De Dion setup for Lotus was similar except they split the
triangle into two seperate links. Aloso of note is a setup called a Mumford
link. It was developed in England (of course) and can be best described as a
pair of Watts linkages joined together. It has the advantage of being able to
center the axle and allow for roll centers below ground or above by position
of the links. It is used on the cars built by Mallocck in the UK. Racecar
Engineering had a writeup on it some time ago. Also the book 750 Racer has a
bunch of info on it. It requires a strong frame, but has many good points,
including the fact that you can run the other links in a Ladder bar or four
link for traction control without affecting it. 
Fred