Hi Roger, Listers use MG TD TF spindles and modified MG upper and lower
trundels. The uprights are slightly modifed MG uprights made of 4130 steel.
We feel that these are the weakest link on the car and are crack tested at
least twice a year. regards, John
----- Original Message -----
From: "Roger Sieling" <Rogsie@telesistech.com>
To: <JWoesvra@aol.com>; <vintage-race@autox.team.net>
Sent: Tuesday, November 28, 2000 8:17 AM
Subject: Re: British parts failure update
> Jack,
>
> I am unfamiliar with what was used on the front of AC's and Listers. Is it
> something common, similar in concept to the Alford & Aldor upright/
spindle
> that was used on Standard 10's and adopted into Spitfires and Lotus and
damn
> near every small formula and sports racer from UK from the late 50 to
1970.
> I'm sure it is not that particular part but is this perhaps the larger TR
> parts or something off a Ford or large Austin? If memory serves me, the AC
> used a transverse leaf spring at each end. Are these Fiat Topolina parts
like
> Cooper used?
>
> Roger
>
> >>> <JWoesvra@aol.com> 11/28/00 07:34AM >>>
> In a message dated 11/24/00 10:57:17 AM Pacific Standard Time, JWoesvra
> writes:
>
> This whole thing started when I posted this message that came to me. I was
> hoping that some of you would comment on it. I have no idea whether there
is
> anything to it, but I think it is an interesting subject, and hence worthy
of
> review. Some how we got into a fuss again about who knows what "true
vintage
> racing" is.
>
> Jack Woehrle
>
> << My ex boss here in the USA (now retired) says the British had high
> tensile steel forgings that they either insisted on thru-hardening or
> lacked a good process of case hardening to retain a tough, malleable
> core. Apparently when they've reached fatigue they break instead of
bend.
> This was known here at the time he was involved with importation
> of engineless ACs for Shelby, which is why Phil Remington there
> specified US replacements for that car's spindles. All cars receiving
> their engines over here had this done, sort of a preemptive recall
> campaign. There was enough visual difference in the parts that some
> concours people have raised authenticity issues over the substitution.
> I think he said the originals were shipped back so probably only
> several carsets made the round trip for the whole of the production
> run! I think Brian Lister dealt with a similar spindle problem.
>
> But, and this is dead serious --there is a potential epidemic of
> failure parts awaiting us, I fear.. There should be some test lab
> which can section apart any unfailed test part and then with Tinius
> Olsen tester verify if that is a potential root cause of potential
> failure in the whole class of parts -- the answer being to then
> commission a new run of CNC parts. The alternative to CNC
> is to CAST replacements out of 17-3 Stainless casting alloy.
> That material, once simply heated to 1100 deg F. and air
> quenched is said to combine both 180,000 psi yield with
> good elongation (ductility) properties. I am NOT the expert
> but can furnish two people to amplify this if desired -- the one
> I mentioned, and another a metallurgist specializing in stainless.
>
> Larry Gallo >>
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