Stressbar discussion...

[mr.utility at highstream.net (David Utley)]

I can agree with that.  See?  I -can- be agreeable...  Not always.  In fact, 
only today...  :-)

Thanks for the specifics...

  Regards,
    David

Quoting Dan Bubb <jdbubb@ix.netcom.com>:

> "Another point to consider is that if your outer strut tower is deflected
> outwards 0.20" by this 333
> lb force, then you just lost 0.5? of negative camber!  If it deflects 0.42"
> you have lost a full
> degree of negative camber. "
> 
> This is the quote. He doesn't state any measured deflection. He's only
> equating deflection to camber
> change. Both deflections, 0.20" and 0.42",  are hypothetical.
> I'm merely pointing out that if the chassis was so weak that it had that much
> deflection the extreme
> movement and resultant stresses (beyond the material yield point) would
> fatigue and crack the metal
> very quickly.
> The actual deflections can't be as high as his examples so the camber change
> due to deflection is
> proportionally much less.
> Just making the point that he's exaggerating the possible camber change due
> to deflection.
> Dan
> 
> 
> ----- Original Message -----
> From: "David Utley" <mr.utility@highstream.net>
> To: "Dan Bubb" <jdbubb@ix.netcom.com>
> Cc: <scirocco-l@scirocco.org>
> Sent: Friday, March 05, 2004 5:13 PM
> Subject: Re: Stressbar discussion...
> 
> 
> > I re-read the article, and I there is still something not right...  What
> read
> > said that --if-- it deflected .42", you would have a full degree of camber
> > loss.  In his situation, he saw .20".  Now did I misread something?
> >
> > LMK,
> >   David
> >
> > Quoting Dan Bubb <jdbubb@ix.netcom.com>:
> >
> > > > Quoting David Utley <mr.utility@highstream.net>:
> > >
> > >
> > > > Two questions that I erased and should not have...
> > > >
> > > >   1)  What is the source of your claim that his estimates are wrong
> for
> > > the
> > > > amount of deflection at the front strut tower?
> > > >
> > > >   2)  How is it that his example is 'ridiculous'?  I can understand
> that
> > > you
> > > > may not like/appreciate his example, so therefore why do you not
> > > appreciate
> > > > it, and furthermore, why is it ridiculous?
> > > >
> > > > Thanks for your time...
> > >
> > > The answer is the same for both questions.
> > > If the shock tower were moving .42" everytime the car hit max corner
> force
> > > the metal would fatique
> > > and crack in very few cycles. So, his pronouncment that you could get 1
> > > degree of camber deflect if
> > > a gross overstatement.
> > > Dan
> > >
> > > >
> > > > Quoting David Utley <mr.utility@highstream.net>:
> > > >
> > > > >
> > > > >
> > > > > Quoting Dan Bubb <jdbubb@ix.netcom.com>:
> > > > >
> > > > > > 0.2 degree!
> > > > > >
> > > > > > Also, this example has absolutely nothing to do with the analysis
> one
> > > > > would
> > > > > > do for a rear stress bar
> > > > > > on a Scirocco.
> > > > > > Dan
> > > > > >
> > > > >
> > > > > Neither did my example, which is on a Rabbit, if you remember.  But
> we
> > > are
> > > > > arguing about different things, too...  My experience was with the
> > > Neuspeed
> > > > > bar, which has poly inserts on the top...  You never did respond to
> > > that...
> > > > >
> > > > >
> > > > >
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: "David Utley" <mr.utility@highstream.net>
> > > > > > To: "Aaron" <aaron@brixtonhill.demon.co.uk>
> > > > > > Cc: "Scirocco Mailing List" <scirocco-l@scirocco.org>
> > > > > > Sent: Thursday, March 04, 2004 5:21 PM
> > > > > > Subject: Stressbar discussion...
> > > > > >
> > > > > >
> > > > > > >   Here is a link for some discussion on our topic, although it
> only
> > > > > deals
> > > > > > with
> > > > > > > the front...  I will post more pertinent sites as I find them...
> > > > > > >
> > > > > > >
> > > > >
> > >
> http://www.e30m3performance.com/myths/Strutbar_Theory/strut_bar_theory.htm
> > > > > > >
> > > > > > >
> > > > > > > --
> 
> 
> 


-- 
Regards,
David Utley
-----------
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