[urq] Re: Tubular contro arms, any interest??

[JShadzi at aol.com]

Sure, my point was that if you build the CA to the design you posted, and its build from a quality steel, it will be very strong, you could try adding in engineered weakness to help it crumple and fail in a controleld way, but that would require a lot of testing that I don't thing is practical for a part like this.

One other thing I wanted to mention, for my use, a part like this is mainly useful for suspension alignment considerations, I'd love to see it capable of reasonable caster changes, and camber changes up to 3 degrees if possible.  Also leveling of the CA arm and basic geometry changes.  I'd be interested in heim joints on the bushing side to eliminate any slop there.

Javad

>Granted, it would be sold as an "off road use" item.
>
>FEA and some testing on my own car (navigational rally and/or ice racing event) and I hope to have something ready for next UPG meeting.
>
>Martin
>
>www.quattro.ca
> ---------- Original Message ----------------------------------
>From: JShadzi at aol.com
>Date:  Fri, 13 Feb 2004 09:55:43 EST
>
>>Understood WRT strenght, the stock arms are carefully desinges to crumple and 
>>self destruct at more or less the slightest impact, but I dont' imagine 
>>you'll be able to design the same feature in the CA's you're buiding, and say you 
>>did, I'd expect a considerable amount of testing before I'd put them on my own 
>>car.  
>>
>>Withstanding rigorous testing, the only option IMO is to make the design 
>>strong to rule out failure during the normal course of use.  I think for all 
>>practical purposes this part should be considered a race piece, it wouldn't be 
>>practical to think it will have the same saftey features as the stock pice, which 
>>works exceptionally well.
>>
>>Javad
>>
>>
>>In a message dated 2/13/2004 4:21:52 AM Pacific Standard Time, 
>>Martin at quattro.ca writes:
>>Hi,
>>
>>Heim joints at bushings end is another alternative, actually it was my 
>>initial thought and Assebly A.. ;), this would provide the small caster adjustments 
>>for the few that want it... 
>>However those would be slightly more expensive and transfer more shock into 
>>the chassis.
>>
>>The idea is not to make these stronger than stock, one reason is that when 
>>you hit a curbe you want a weak link to brake before all the force is transfered 
>>into the sub-frame and chassis...
>>
>>Let me make the first samples and test fit them... shouldn't take long, maybe 
>>couple of weeks.
>>
>>I'll let everyone know of the results and costs invloved.
>>
>>Thanks!
>>Martin Pajak
>>
>>Pajak Performance Parts
>>www.quattro.ca
>>
>>
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