Re: alfa-digest V9 #224

[Robert Wilkinson <wilk@domain.elided>]

I have followed this thread with interest.  While I have no comment on the
issue of IRS "purity" with or without swaybars, etc., I submit that the
main advantage of IRS is a favorable sprung/unsprung weight ratio (see
examples below).  De Dion is pretty good in this regard as well.  Fred Puhn
makes this point in his book on handling:

solid axle:  3.54
De Dion: 4.00
IRS:  4.55
De Dion, inboard brakes:  5.66
IRS, inboard brakes:  6.69

(all with coil, not leaf, springs)

Bob Wilkinson
72 Spider
64 Corvair conv.
72 Jag XJ6
00 Audi A6
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