<VV> Fan belt tension

[Frank DuVal]

That makes more sense! I thought it was a friction issue. If the belt is 
glazed, it never stops squealing even if warm.

Frank DuVal

On 4/11/2012 9:23 PM, jvhroberts at aol.com wrote:
> Nah, they stop squealing because warm rubber has a higher coefficient 
> of friction. Just like tires!
>
> John Roberts
>
>
> -----Original Message-----
> From: Frank DuVal <corvairduval at cox.net>
> To: virtualvairs <virtualvairs at corvair.org>
> Sent: Wed, Apr 11, 2012 9:21 pm
> Subject: Re: <VV> Fan belt tension
>
> Interesting. The Car Talk guys say that belt squealing goes away after
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> the belt gets warm because the belt gets tighter. I always wondered if
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> that was true, as most things get larger when warmer. Maybe they were
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> thinking larger cross section= tighter belt. Maybe they weren't thinking!
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> Frank DuVal
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> On 4/11/2012 8:17 PM,jvhroberts at aol.com  <mailto:jvhroberts at aol.com>  wrote:
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> >    The belt expands thermally about 10x that of any of the metals the engine is
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> made of. It'll get looser as it gets warmer. Check your CTE tables for polymers,
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> and all will become clear.
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> >
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> >  The belt has problems because of the design. Stick shifts make things worse.
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> Looser belts stay on better, but wear out faster. That around the corner thing
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> might be fine for an econo car, but run a turbo to redline a bunch of times,
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> and, well, the result is obvious! After all, the fan on a water pumper is WAY
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> more massive than a Corvair fan, and they stay on, even without the viscous
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> clutch!
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> >  John Roberts
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