RE: Front cross member braces from Ron Wood

[John Edwards <edwardsj@runecraft.com>]

Hitting the steel cable *will* create a noise and it will be "louder" than
hitting the bar as there will be more amplitude in the wave traveling
through the cable. Imagine the cable hung from a support by one end, hitting
it on the ground would result in the grpund absorbing the energy.

The difference is, the noise produced by the cable will have a much, much
lower frequency and hence outside the range of human hearing....

-----Original Message-----
From: Fry, Larry [mailto:LEF@chem-tronics.com]
Sent: 06 November 2001 14:27
To: Chris DeLong; kcollins1@socal.rr.com; scirocco-l@scirocco.org
Subject: RE: Front cross member braces from Ron Wood


Quite.   That's why you get vibrations(sound)from a plucked guitar string
only when it's stretched tight (solid).  
Put another way, strike a four-foot steel rod and it will "ring".  Strike a
four-foot length of steel chain and it won't.

Larry  sandiego16V 

-----Original Message-----
From: Chris DeLong [mailto:green536@hotmail.com]
Sent: Tuesday, November 06, 2001 12:32 AM
To: kcollins1@socal.rr.com; scirocco-l@scirocco.org
Subject: Re: Front cross member braces from Ron Wood


So you are saying Larry that resonant harmonics become more pronounced in a 
solid structure than they normally would be given a loose structure? Keep in

mind that harmonics are vibrations.

Chris DeLong
ICQ#45030867
Seattle, WA USA
'80 16V 'Rocco ragtop
'91 GLi 2.0 16V
'77 Rabbit 16V
'80 'Vert (parting out!)
'61 17 Window type II
'91 Vanagon
'78 Rabbit
'78 Rabbit (for sale)
'87 GTi 16V



>From: Kevin Collins <kcollins1@socal.rr.com>
>To: scirocco-l@scirocco.org
>Subject: Re: Front cross member braces from Ron Wood
>Date: Mon, 05 Nov 2001 22:35:24 -0800
>
>Larry wrote:
>
> > any device that stiffens the structure will increase felt vibrations.
>
>Really?  Hasn't happened in my case.  And thinking about it, I don't follow
>your logic - for instance, passenger cars have been built with increasing
>rigidivity and "stiffness" for the last 20 years or so - and the effect
>is just the opposite - to make them more solid, rattle-free, and long-
>lasting.  What am I missing?
>
>--
>Kevin Collins
>Huntington Beach, CA
>'86.5 16V 2.0
>'00 Passat GLS 1.8T
>
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>Email LIST problems to: scirocco-l-probs@scirocco.org.
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>


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