Re: Re: French You Tube Seies

Hi Chris

This is from January/February 2016.
Think the other article may have been in the old Tech Torque, so it should be in the new one but I cannot open it.

TOC TECH
So, the article I mentioned in the last FP is sitting snugly up on the web site and Mick has added a few more from his own web archives.
I’ve now added two more articles to the TOC Tech section on the site. Remember: you go onto the site, click on the Technical Support button, then enter the TOC Tech section to find all these articles.
Here are the abstracts of the two latest pieces to go up on the site.

Article Title:
New improved silent blocs now available for TAs, including the Big 6
Abstract notes by:
Roger Williams
In the rush to get the Traction built certain parts had serious engineering flaws that were not addressed during its 23 year production life and the design of the silent bloc type suspension system is a good example of this. The principle of the design for the Normale/Légère type cars is that a splined pin connects the bottom suspension arm to the front and rear silent blocs that are bolted to the cradle. The splines in the broached tube that are ‘rubbered’ into the silent bloc housing and those in the bottom suspension
arm are parallel but the splined connecting pin is tapered. The splined connecting pin is knocked in from the rear and gets successively tighter as it passes through the bottom suspension arm and into the front silent bloc. The original splined connecting pins were splined over their full length but later there was an undercut section of approx 50mm with no splines where it passed through the bottom suspension arm. This reduced the engagement in the bottom arm by 60%
and caused the broaching at the outer edges of the bottom suspension arm to ‘bell mouth’.

I understand Roger Williams has retired and his son has taken over the business, if I had seen this before I had bought the silent blocks I would have looked into it.

Dave