<VV> Fan belt tension

[jvhroberts at aol.com]

 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 

the belt gets warm because the belt gets tighter. I always wondered if 

that was true, as most things get larger when warmer. Maybe they were 

thinking larger cross section= tighter belt. Maybe they weren't thinking!



Frank DuVal



On 4/11/2012 8:17 PM, jvhroberts at aol.com wrote:

>   The belt expands thermally about 10x that of any of the metals the engine is 

made of. It'll get looser as it gets warmer. Check your CTE tables for polymers, 

and all will become clear.

>

> The belt has problems because of the design. Stick shifts make things worse. 

Looser belts stay on better, but wear out faster. That around the corner thing 

might be fine for an econo car, but run a turbo to redline a bunch of times, 

and, well, the result is obvious! After all, the fan on a water pumper is WAY 

more massive than a Corvair fan, and they stay on, even without the viscous 

clutch!

>

>

>

>

> John Roberts

>

>

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